Entries |
Document | Title | Date |
20080284487 | Passive Mixer And High Q RF Filter Using A Passive Mixer - A passive mixer include a switching architecture configured to generate differential in-phase (I) and differential quadrature-phase (Q) signals using differential components of the in-phase (I) and quadrature-phase (Q) signals operating on transitions of an approximate 25% duty cycle signal. | 11-20-2008 |
20080303579 | MIXER WITH CARRIER LEAKAGE CALIBRATION - A mixer circuit. The mixer circuit comprises a double-balanced mixer and a carrier-leakage calibration cell. The double-balanced mixer has first and second input pairs whereby the first input pair receives the first differential input signal. The carrier-leakage calibration cell receives the second differential input signal and a differential calibration current and generates first and second output voltages to the second input pair of the double-balanced mixer. | 12-11-2008 |
20080315940 | Mixing device for plural digital data having different sampling rates - A method of mixing a first digital data having a first sampling rate and a second digital data having a second sampling rate includes converting the second digital data, by using a first coefficient obtained by multiplying a sampling coefficient with a volume coefficient for the second digital data, to produce a converted second digital data which has the same sampling coefficient as the first digital data, converting the first digital data, by using a volume coefficient for the first digital data, to produce a converted first digital data and mixing the converted second digital with the converted first digital data. | 12-25-2008 |
20090058495 | CIRCUIT ARRANGEMENT FOR SIGNAL MIXING - A circuit arrangement for signal mixing. One embodiment provides a circuit arrangement for mixing an input signal with at least one carrier signal. The circuit arrangement includes a current source and a current sink. The current source and the current sink have a mixer core coupled between them which provides cross-coupling between mixer input connections and mixer output connections. | 03-05-2009 |
20090085642 | PASSIVE MIXER HAVING TRANSCONDUCTANCE AMPLIFIER WITH SOURCE DEGENERATION CAPACITANCE - A passive mixer includes a transconductance amplifier having a source degeneration capacitance. The transconductance amplifier has an input for receiving an input signal and an output for outputting a current signal. A multiplier is provided for mixing a local oscillator signal with the current signal so as to provide an output signal at an output of the passive mixer. A capacitive load is connected to the output of the passive mixer. | 04-02-2009 |
20090251196 | MOSFET Parametric Amplifier - A circuit includes an input terminal adapted to receive an input voltage, a MOSFET having its drain terminal and its source terminal connected together, a first switching arrangement configured to be controlled by a first clock signal and adapted to selectively couple the gate terminal to the input terminal, and a further switching arrangement configured to be controlled by a further clock signal in timing relationship with the first clock signal and adapted to selectively couple the source terminal and a first voltage which is capable of pulling carriers out of a channel when the first switching arrangement is not coupling the input terminal to the gate terminal. | 10-08-2009 |
20090261886 | MIXER CIRCUIT, COMMUNICATION DEVICE, AND ELECTRONIC EQUIPMENT - A mixer circuit includes a grounded-gate amplifier disposed between an input node and a first node, and first through nth (n denotes an integer equal to or greater than 1) series transistor rows disposed between the first node and a second node, each of the first through nth series transistor rows includes two or more transistors coupled in series between the first node and the second node, and the transistors constituting the first through nth series transistor rows are controlled by first through mth (m denotes an integer equal to or greater than 2) control signals. | 10-22-2009 |
20090261887 | SYSTEM FOR REDUCING SECOND ORDER INTERMODULATION PRODUCTS FROM DIFFERENTIAL CIRCUITS - A passive CMOS differential mixer circuit with a mismatch correction circuit for balancing the electrical characteristics of the two output paths. Once the output paths of the differential circuit are balanced, or matched as closely as possible, second order intermodulation product generation can be inhibited or at least reduced to acceptable levels. The mismatch correction circuit receives a digital offset signal, and generates one or more voltage signals to be selectively applied to the signal paths of the passive differential mixer circuit. The voltage signals can be adjusted back gate bias voltages applied to the bulk terminals of selected transistors to adjust their threshold voltages, or the voltage signals can be adjusted common mode voltages applied directly to a selected signal path. Since the differential mixer circuit is passive, no DC current contribution to noise is generated. The switching transistors of the mixer circuit can be maintained at minimal dimensions to reduce switching signal drive loading, resulting in lower power consumption and higher operating frequencies than if larger switching transistors were use | 10-22-2009 |
20090267676 | MULTI-INPUT MIXER, MIXER DEVICE, AND MIXING METHOD - A mixer device includes a differential circuit, a transconductance circuit, and a selecting circuit. The differential circuit receives a differential input signal and generates a differential output signal. The transconductance circuit is coupled to the differential circuit, receives a plurality of radio frequency input signals, and determines to mix at least one of the radio frequency input signals with the differential input signal according to an enable signal. The selecting circuit receives a control signal and generates the enable signal according to the control signal. | 10-29-2009 |
20090289687 | MIXER HAVING CONTROLLABLE LOAD WITH REDUCED EQUIVALENT LOAD VALUE DURING SWITCHING TRANSIENTS OF LOCAL OSCILLATING SIGNAL - A mixer has a controllable load, a signal mixing module, and a controller. The controllable load is controlled by a control signal to change an equivalent load value thereof. The signal mixing module has an output port coupled to the controllable load and an input port coupled to an input signal, and is used for mixing the input signal with a local oscillation signal. The controller is coupled to the controllable load, and is used for generating the control signal to reduce the equivalent load value of the controllable load during switching transients of the local oscillation signal. | 11-26-2009 |
20090289688 | SIGNAL ADJUSTING CIRCUIT - A signal adjusting circuit is provided. The signal adjusting circuit includes a first operational unit, a second operational unit, an auto-gain controller (AGC), a first clamp circuit, and a second clamp circuit is provided. The first operational unit performs an operation to a digital signal and a first gain value, to obtain a first adjusting signal. The second operational unit performs an operation to the digital signal and a second gain value, to obtain a second adjusting signal. The AGC generates a third gain value according to the first adjusting signal. The first clamp circuit receives and restricts the third gain value between a first upper limit and a first lower limit for generating the first gain value. The second clamp circuit receives and restricts the third gain value between a second upper limit and a second lower limit for generating the second gain value. | 11-26-2009 |
20090309646 | RANDOM NUMBER GENERATION DEVICE - A random number generation device includes: a first source region; a first drain region; a first channel region provided between the first source region and the first drain region; a first insulating film provided on the first channel region; and a first gate electrode provided on the first insulating film. The first insulating film has a trap capturing and releasing a charge, and a tensile or compressive stress is applied in a direction of a gate length to at least one of the first channel region and the first insulating film. | 12-17-2009 |
20100026367 | DOUBLE-BALANCED SINUSOIDAL MIXING PHASE INTERPOLATOR CIRCUIT AND METHOD - A double-balanced sinusoidal mixing phase interpolator circuit comprises: a double-balanced gain stage having a first input for receiving a first phasor clock, a second input for receiving a second phasor clock, and a phase interpolator (PI) output, wherein the double-balance gain stage includes (i) a first gain stage having a positive input side and a negative input side for the first phasor clock and (ii) a second gain stage having a positive input side and a negative input side for the second phasor clock; and a sinusoidal digital-to-analog (DAC) stage coupled to the double-balanced gain stage and configured to implement sinusoidal weighting of positive and negative sides of differential DAC current for the first phasor clock and positive and negative sides of differential DAC current for the second phasor clock, wherein the sinusoidal weighting provides uniformly spaced phase steps in the phase interpolator (PI) output. | 02-04-2010 |
20100079189 | MINIATURIZED DUAL-BALANCED MIXER CIRCUIT BASED ON A DOUBLE SPIRAL LAYOUT ARCHITECTURE - A miniaturized dual-balanced mixer circuit based on a double spiral layout architecture is proposed, which is designed for use to provide a frequency mixing function for millimeter wave (MMW) signals, and which features a downsized circuit layout architecture that allows IC implementation to be more miniaturized than the conventional star-type dual-balanced mixer (DBM). The proposed miniaturized dual-balanced mixer circuit is distinguished from the conventional star-type DBM particularly in the use of a double spiral layout architecture for the layout of two balun circuit units. This feature allows the required layout area to be only about 15% of that of the conventional star-type DBM. | 04-01-2010 |
20100090745 | Octave-range, watt-level, fully-integrated CMOS switching power mixer array for linearization and back-off-efficiency improvement - Power mixer arrays for providing watt-level power in mobile systems. In one embodiment, a fully-integrated octave-range CMOS power mixer that occupies only | 04-15-2010 |
20100109746 | SAMPLING MIXER, FILTER DEVICE, AND RADIO DEVICE - A sampling mixer includes TAs (transconductance amplifiers), an in-phase mixer section connected to the TA and the TA, an opposite-phase mixer section connected in parallel with the in-phase mixer section, and a signal generator for generating a control signal for the in-phase mixer section and the opposite-phase mixer section respectively. The IIR filter using signals that underwent a current conversion by using the different transconductances is constructed, so that the filter characteristic can be designed by a weighting of the transconductance in addition to a capacitance ratio. As a result, the wide-band filter characteristic and the band-pass filter characteristic can be obtained, and deterioration of the receiving sensitivity can be suppressed by designing the filter characteristic suitable for the radio communication system. | 05-06-2010 |
20100141325 | METHOD AND ARRANGEMENT FOR A LINEAR MIXER - A combination mixer arrangement comprising a first mixer and a second mixer coupled in parallel between first and second input ports and an output port. The mixers are arranged to be driven simultaneously by an input signal provided at the second input port. They are de-coupled, so a bias voltage applied at the first input port provides dc bias simultaneously for the mixers to enable gain expansion of the first mixer responsive to an increase in said input signal and thereby an improved linearity for the combination mixer arrangement. | 06-10-2010 |
20100171542 | RECONFIGURABLE MIXER WITH GAIN CONTROL - A frequency mixer or modulator circuit that is reconfigurable through electronic programming among active and passive operation, and/or harmonic and sub-harmonic operation, and/or up-conversion and down-conversion, and/or no-overlap, off-overlap, and on-overlap mixing, and/or upper-sideband modulation and lower-sideband modulation. In one example, the frequency mixer or modulator circuit also includes automatic gain control. | 07-08-2010 |
20100207678 | MIXER ARCHITECTURE - This invention relates to a device, a method, a system, wherein at least two mixer units are associated with at least two different mixer frequencies, and wherein each of said mixer units comprises a first input configured to receive at least one input signal to be mixed, and wherein at least one amplifier is coupled to said at least two mixer units, wherein each of said at least one amplifier is coupled to at least two outputs of at least two different mixer units of said at least two mixer units. | 08-19-2010 |
20100295597 | MIXER WITH HIGH LINEARITY AND LOW OPERATING VOLTAGE - A mixer with high linearity and a low operating voltage is provided. The mixer includes a transconductor and a switch circuit. The transconductor receives a differential voltage signal and outputs a differential current signal accordingly. The transconductor includes a first resistor, a second resistor, a differential amplifier, a first current source and a second current source. The switch circuit includes a first switch, a second switch, a third switch, and a fourth switch. The first and second switches are coupled to a first input of the differential amplifier, while the third and fourth switches are coupled to a second input of the differential amplifier. The first and third switches are mutually coupled to provide an output of the mixer, while the second and fourth switched are mutually coupled to provide another output of the mixer. Each of the first, second, third and fourth switches determines whether to allow the differential current signal to pass through according to a differential control signal. | 11-25-2010 |
20100295598 | ADAPTIVE RADIO TRANSCEIVER WITH A LOCAL OSCILLATOR - An exemplary embodiment of the present invention described and shown in the specification and drawings is a transceiver with a receiver, a transmitter, a local oscillator (LO) generator, a controller, and a self-testing unit. All of these components can be packaged for integration into a single IC including components such as filters and inductors. The controller for adaptive programming and calibration of the receiver, transmitter and LO generator. The self-testing unit generates is used to determine the gain, frequency characteristics, selectivity, noise floor, and distortion behavior of the receiver, transmitter and LO generator. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or the meaning of the claims. | 11-25-2010 |
20100295599 | Transmit Architecture for Wireless Multi-Mode Applications - In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands are provided. Multiplexing circuitry is coupled to the plurality of baluns where the upconversion unit is coupled to each balun through the multiplexing circuitry. The multiplexing circuitry is configured to multiplex the radio frequency signal from the upconversion unit to one of the plurality of baluns based on a wireless band being used. | 11-25-2010 |
20100321085 | System and Method For Direct Digitization of NMR Signals - A magnetic resonance imaging (MRI) system includes a transmitter that produces an RF excitation pulse that is applied to a subject positioned in the MRI system to induce emission of at least one of an NMR signal and an ESR signal therefrom, and that produces a reference signal indicative of the phase of the RF excitation pulse. A first analog-to-digital converter has an input for receiving the reference signal that is synchronous with the RF excitation pulse. One or more additional analog-to-digital converters/processors have inputs for receiving the at least one of NMR signals and ESR signals produced by a subject placed in the MRI system and produce one or more complex digital signals therefrom. A normalizer is connected to receive and normalize the digital reference signal and a mixer is connected to receive the normalized digital reference signal and the digital signal. Accordingly, the mixer is operable to multiply the normalized complex digital reference signal with the complex digital signal. | 12-23-2010 |
20100327939 | MIXER CIRCUIT - A double balanced mixer circuit comprising a differential pair of first amplifier elements responsive to an RF differential input signal, double differential pairs of second amplifier elements responsive to an LO differential input signal, and differential output terminals connected with the second amplifier paths. Coupling elements provide first and second parallel DC connections between DC voltage supply rails for the first and the double second amplifier paths respectively and a series RF connection of the first and second amplifier paths between the supply rails so as to produce a mixed differential amplified signal at the differential output terminals. The coupling elements include respective transmission lines in the first amplifier paths connected between one of the DC voltage supply rails and respective ones of the first amplifier elements and a common transmission line connected between the other of the DC voltage supply rails and both the first amplifier elements. | 12-30-2010 |
20110001539 | MIXER-TRANSCONDUCTANCE INTERFACE - Techniques for providing an efficient interface between a mixer block and a transconductance (Gm) block. In an exemplary embodiment, the output currents of at least two unit cells of the transconductance block are conductively coupled together, and coupled to the mixer block using a single conductive path. For a differential signal, the conductive path may include two conductive leads. Within the mixer block, the single conductive path may be fanned out to at least two unit cells of the mixer block. At least one Gm unit cell may be selectively enabled or disabled to control the gain setting of the mixer-transconductance block. The techniques may further be applied to transceiver architectures supporting in-phase and quadrature mixing, as well as multi-mode and/or multi-band operation. | 01-06-2011 |
20110001540 | COMBINED MIXER AND BALUN DESIGN - A circuit with inputs for first (LO) and second (IF) unbalanced signals at respective first and second frequencies, also comprising a mixer for the first and second input signals to produce a third signal (RF) at a third frequency at an output port. The mixer comprises first and second transistors which are cross-coupled to each other. Output terminals of the transistors are connected to the output port, and the mixer also comprises a first impedance connected to ground. The mixer, by means of the transistors and the first impedance is an active balun for the first input signal (IF), and the input port for the second signal (LO) comprises a second impedance, so that the first and second impedances together act as a passive balun for the second signal (LO). | 01-06-2011 |
20110063013 | MIXER CIRCUIT - The present invention discloses a mixer circuit for mixing two input signals by source-coupled MOS transistors and outputting a mixed result. A duty cycle controlling MOS transistor is connected to a source of each source-coupled MOS transistor in series. A duty cycle controlling pulse is applied to a gate of the duty cycle controlling MOS transistor. The duty cycle controlling pulse has a phase shift of −90 degrees with respect to a controlling pulse applied to the gate of the source-coupled MOS transistor connected with the duty cycle controlling MOS transistor in series. An AND-combination of the duty cycles of the two controlling pulses applied to the gates of the two MOS transistors connected in series can be controlled at 25%. Comparing to the conventional mixer circuit having a switch control duty cycle of 50%, the present invention achieves the effects of increasing the gain and reducing the noise figure. | 03-17-2011 |
20110074487 | OPTICAL MODULATOR DRIVE CIRCUIT - A modulator drive circuit provides a modulator drive signal, representative of a data waveform, to modulate an optical signal for transport across a network infrastructure. The modulator drive circuit includes a broadband Bias-T circuit insensitive to the frequency range of the data waveform. The Bias-T circuit provides for an adjustable bias level to maintain proper operation of a modulator used to modulate the optical signal. One or more modulator drive circuits may be provided on a single substrate. | 03-31-2011 |
20110089990 | Control Loop for Amplification Stage - There is disclosed a method and apparatus for generating an output signal comprising a replica of an input signal, comprising the steps of: generating a replica signal representing the low frequency content of the input signal; generating an error signal representing an error in the replica signal; combining the replica signal with the error signal to generate an output signal; and wherein the step of generating the error signal further includes the steps of: generating a delay signal being a delayed version of the input signal; and determining a difference between the output signal and the delay signal which difference is the error signal. | 04-21-2011 |
20110187437 | Radio-Frequency (RF) Amplifier Circuits and Related Techniques - A power combining and outphasing system and related techniques for simultaneously providing both wide-bandwidth linear amplification and high average efficiency is described. Providing linear amplification encompasses the ability to dynamically control an RF output power level over a wide range while still operating over a wide frequency bandwidth. The system and techniques described herein also operate to maintain high efficiency across a wide range of output power levels, such that a high average efficiency can be achieved for highly modulated output waveforms. | 08-04-2011 |
20110221505 | Distributed, diode mixer circuit - A distributed, diode mixer circuit includes a plurality of passive diode mixer cores including at least first and second passive diode mixer cores including doubly-balanced diodes in symmetrical balanced configuration forms, each mixer core having a pair of differential reference nodes driven by the reference signal and a pair of differential nodes driven by the data signal and a reactive impedance network including one or multiple reactive elements or transmission lines connected between the like nodes of each the first and second mixer cores. | 09-15-2011 |
20110221506 | Phase-combining circuit and timing signal generator circuit for carrying out a high-speed signal transmission - A phase-combining circuit for combining cyclic timing waveforms that have been phase-controlled by control signals based on three or more input signals of different phases, has a weight signal generating circuit and a weighting circuit. The weight signal generating circuit generates weights according to the control signals, and the weighting circuit gives the weights to the respective input signals, with a positive or negative polarity for each one signal. | 09-15-2011 |
20110221507 | SAMPLING MIXER, FILTER DEVICE, AND RADIO DEVICE - A sampling mixer includes TAs (transconductance amplifiers), an in-phase mixer section connected to the TA and the TA, an opposite-phase mixer section connected in parallel with the in-phase mixer section, and a signal generator for generating a control signal for the in-phase mixer section and the opposite-phase mixer section respectively. The IIR filter using signals that underwent a current conversion by using the different transconductances is constructed, so that the filter characteristic can be designed by a weighting of the transconductance in addition to a capacitance ratio. As a result, the wide-band filter characteristic and the band-pass filter characteristic can be obtained, and deterioration of the receiving sensitivity can be suppressed by designing the filter characteristic suitable for the radio communication system. | 09-15-2011 |
20110234292 | LOW NOISE MIXER - One embodiment relates to a mixer for providing a mixed output signal. The mixer includes a radio-frequency (RF) stage, first and second power dividers, and first and second frequency-conversion stages. The RF stage includes a first differential pair. The first power divider is coupled to a first transistor of the first differential pair, and the second power divider is coupled to a second transistor of the first differential pair. The first frequency-conversion stage, which is adapted to provide a first converted-frequency signal, includes a second differential pair coupled to the second power divider and a third differential pair coupled to the first power divider. The second frequency-conversion stage, which is adapted to provide a second converted-frequency signal, includes a fourth differential pair coupled to the second power divider and a fifth differential pair coupled to the first power divider. Other techniques are also provided. | 09-29-2011 |
20110279164 | MULTIPHASE MIXER - Disclosed is a mixer able to simultaneously suppress self-mixing and low-order harmonic response in a charge sampling circuit. Specifically disclosed is a multiphase mixer provided with a transconductance amplifier ( | 11-17-2011 |
20110285450 | Managing Heat Dissipation While Testing A Power Device - According to certain embodiments, an apparatus comprises port interfaces, charge storage devices, and a charge combiner coupled to a circuit board. Each charge storage device is associated with a port interface. Each port interface receives a current of charge from a device under test and pumps the charge to an associated charge storage device at a predetermined rate. Each charge storage device stores the charge from an associated port interface. The charge combiner combines the charge from the charge storage devices to yield a combined charge and feeds the combined charge to an output regulator. | 11-24-2011 |
20110291734 | CONFIGURABLE CALCULATING CIRCUIT AND RECEIVER HAVING A PLURALITY OF CONFIGURABLE CALCULATING CIRCUITS - A configurable calculating circuit includes a multiplexer, a mixer and an accumulator. The multiplexer is for receiving input signals including at least a first and a second input signals, and selectively outputting at least one of the input signals. The mixer is for mixing a selected input signal outputted from the multiplexer with a local oscillation signal to generate a mixed signal. The accumulator is for accumulating the mixed signal to generate an accumulated signal. When the configurable calculating circuit is operated under a first mode, the multiplexer selects the first input signal, and the accumulator performs a first accumulating operation upon the mixed signal; and when the configurable calculating circuit is operated under a second mode, the multiplexer selects the second input signal, and the accumulator performs a second accumulating operation, different from the first accumulating operation, upon the mixed signal. | 12-01-2011 |
20120001674 | WAFER SCALE SPATIAL POWER COMBINER - A plurality of power amplifiers are integrated into a semiconductor substrate and coupled to a corresponding first plurality of antennas on an adjacent first microwave substrate. A second microwave substrate carries a second plurality of antennas coupled to a combining network. The second microwave substrate is separated from the first microwave substrate to allow a free space combination of RF energy propagated by the first plurality of antennas. | 01-05-2012 |
20120007650 | MULTIPLE E-PROBE WAVEGUIDE POWER COMBINER/DIVIDER - A power combiner/divider having a waveguide, a plurality of amplifiers disposed on a supporting structure, a plurality of probes, each one having a first end electrically coupled to an output of a corresponding one of the plurality of amplifiers and a second end projecting outwardly from the supporting structure and into the waveguide. The probes are disposed in a common region of the waveguide. The region has a common electric field maximum within the waveguide. A first portion of the probes proximate the sidewalls have lengths different from a second portion of the probes disposed in a region distal from the sidewalls of the waveguide. The waveguide is supported by the support structure. The power combiner is a monolithic microwave integrated circuit structure. | 01-12-2012 |
20120013387 | WIDEBAND BALUN HAVING A SINGLE PRIMARY AND MULTIPLE SECONDARIES - An RF transmitter capable of transmitting over a wide range of frequencies includes a mixer, a wideband high-Q balun, a first driver amplifier and a second driver amplifier. The balun has a single primary winding and two secondary windings. A differential output of the mixer is coupled to the primary winding. A first of the two secondary windings is coupled to drive the first driver amplifier. A second of the two secondary windings is coupled to drive the second driver amplifier. One driver amplifier is used when transmitting at lower frequencies whereas the other driver amplifier is used when transmitting at higher frequencies. By appropriate sizing of the inductances of the secondary windings and by switching out one of the secondary windings at certain times, the balun is tunable to operate over the wide frequency range while having a high quality factor Q, thereby facilitating reduced power consumption while simultaneously meeting performance requirements. | 01-19-2012 |
20120013388 | METHOD FOR MIXING A COMPLEX DIGITAL SIGNAL WITH A REFERENCE SIGNAL, MIXER AND DIGITAL-TO-ANALOGUE CONVERTER USING THE METHOD - Method and mixer using the method for mixing a complex digital input vector with an oscillator reference signal based on a separation of the mixing process in mainly two processing steps, to with a first step in which a set of n real part values V | 01-19-2012 |
20120019304 | Mixer for Canceling Second-Order Inter-Modulation Distortion and Associated Transconductor Circuit - A transconductor circuit used in a mixer for canceling second-order inter-modulation distortion includes a first transistor and a second transistor, of which the base (gate) ends coupled to a first input end and a second input end, for receiving a differential input signal; and a negative feedback circuit, of which the input end coupled to the emitter (source) ends of the first transistor and the second transistor, of which the out end coupled to the base (gate) ends of the first transistor and the second transistor, for adjusting the voltage of the base (gate) of the first transistor and the second transistor according to the difference between a reference voltage and the detected voltage of the emitter (source) of the first transistor and the second transistor. | 01-26-2012 |
20120019305 | HARMONIC REJECTION OF SIGNAL CONVERTING DEVICE AND METHOD THEREOF - A signal converting device includes: a reference signal-mixing circuit arranged to generate a reference mixing output signal according to an input signal, a reference gain, and a reference local oscillating signal; a plurality of auxiliary signal-mixing circuits, each arranged to generate an auxiliary mixing output signal according to the input signal, an auxiliary gain, and an auxiliary local oscillating signal; and a combining circuit arranged to combine the reference mixing output signal and a plurality of the auxiliary mixing output signals to generate an output signal, and at least one of the auxiliary signal-mixing circuits is configured by the corresponding auxiliary gain to compensate phase imbalances between the reference mixing output signal and each of the auxiliary mixing output signals to reduce a power of a harmonic component in the output signal. | 01-26-2012 |
20120056658 | LCL High Power Combiner - A combiner includes N coaxial cables each configured to connect to a respective output of N radio frequency power amplifiers, where N is an integer greater than one. Each of the N coaxial cables is configured to receive an amplified radio frequency signal from a respective one of the N radio frequency power amplifiers. A board includes capacitances and is configured to connect to each of the N coaxial cables and combine the radio frequency signals. The N coaxial cables and the capacitances provide N inductance and capacitance combinations. A connector is configured to connect an output of the board to a load. | 03-08-2012 |
20120062304 | IMPROVED MIXER CIRCUIT - The invention discloses a mixer circuit ( | 03-15-2012 |
20120105126 | DEVICE AND METHOD FOR STORING AND RETRIEVING OR FOR INCREASING PERSISTENCE TIME IN MEMORY STORAGE FOR ONE OR MORE BINARY DIGITS THROUGH STOCHASTIC RESONANCE - The present invention refers to a device for storing and retrieving one or more binary digits or for increasing persistence time of memory storage for one or more binary digits through Stochastic Resonance, comprising:
| 05-03-2012 |
20120126877 | DEMODULATION MIXING FOR A NEAR FIELD COMMUNICATIONS (NFC) DEVICE - An in-phase, quadrature phase (IQ) mixer for a near field communications (NFC) device is disclosed that includes a signal provider that provides an in-phase (I) mixing signal and a quadrature phase (Q) mixing signal so that the period of the I mixing signal is equal to a period for the Q mixing signal. A controller is configured to control the signal provider so that the average of the I mixing signal over two periods is minimized and the average of the Q mixing signal over two periods is also minimized. The controller is also configured to control the signal provider so that the average propagation delay for the I mixing signal and the Q mixing signal is minimized individually and relative to each other. | 05-24-2012 |
20120161844 | FLEXIBLE LOW NOISE, HIGH LINEARITY, HIGH FREQUENCY, LOW POWER, FULLY DIFFERENTIAL MIXER AND CLASS AB POST-MIXER AMPLIFIER SYSTEM FOR SDR APPLICATIONS - A post-mixer amplifier device which receives and processes signals for use in a software-defined radio integrated circuit is provided. The post-mixer amplifier device includes but is not limited to a voltage amplifier having first and second inputs and a first output, a positive signal output connected with the first output of the voltage amplifier, and a positive signal input connected with a first bipolar junction transistor along a first pathway. The first bipolar junction transistor includes but is not limited to a first collector connected with a the first input of the voltage amplifier and a first emitter connected with an second output of the push-pull unity gain follower and forming a first current feedback pathway. The first bipolar junction transistor is driven with a passive resistive load. | 06-28-2012 |
20120187999 | INTERPOLATION CIRCUIT - An interpolation circuit adapted to receive a plurality of inputs is provided. The inputs include a first input group and a second input group. The interpolation circuit includes a first selecting channel, a second selecting channel, and an interpolation unit. The first selecting channel receives the first input group and outputs a first input of the first input group according to a selecting signal. The second selecting channel receives the second input group and the first input and outputs a second input of the second input group according to the selecting signal. The first selecting channel and the second selecting channel respectively output the first input or the second input. The interpolation unit is coupled to the first selecting channel and the second selecting channel, and receives the first input and the second input, and accordingly performs an interpolation to output an interpolation result. | 07-26-2012 |
20120200333 | MULTIPLIER CIRCUIT - A multiplier circuit including; a 90 degrees coupler that divides an input signal into a first input signal and a second input signal of which phase difference of a base wave is 90 degrees; a first transistor that receives the first input signal and outputs a first output signal including at least a doubled wave and a tripled wave of the first input signal; a second transistor that receives the second input signal and outputs a second output signal including at least a doubled wave and a tripled wave of the second input signal; and a combiner that restrains leakage of the first output signal or the second output signal from one of the first transistor and the second transistor to the other, combines the first output signal and the second output signal, and outputs an output signal of the tripled wave. | 08-09-2012 |
20120212282 | METHODS, CIRCUITS AND SYSTEMS FOR MODULATING SUPPLY VOLTAGE TO A POWER AMPLIFIER - Disclosed are methods, circuits and systems for modulating supply voltage to a power amplifier. An input voltage signal may be received and used to drive a switching regulator (or the like), which regulator may be adapted to modulate (convert) battery supply voltage into a supply voltage of an amplifier. An output signal combining stage may include a signal combiner which may be adapted to combine a modulated battery supply voltage (i.e. modulated by the input voltage) with a residual error correction signal (RECS). The residual error correction signal may be based on an estimate of the switching regulator characteristics. The estimate may be at least partially based on feedback from an output of the regulator. The estimate may be at least partially based on a prediction model of the switch regulator. | 08-23-2012 |
20120249212 | EXTERNAL MOUNTED AMPLIFIERS WITH ACTIVE INTERFERENCE CANCELATION USING DIVERSITY ANTENNAS - A system includes a first external mounted amplifier (EMA) having a first low-noise amplifier (LNA) coupled to a first antenna, a second EMA having a second LNA coupled to a second antenna, a first splitter coupled between the first antenna and the first LNA, a first phase shifter coupled to the first splitter, and a second mixer coupled to the first phase shifter. The first LNA is operable to receive a first input signal from first antenna. The second LNA is operable to receive a second input signal from second antenna. The first splitter is operable to derive a first sampling signal from first signal. The first phase shifter is operable to shift the phase of first sampling signal to create a second cancelation signal. The second mixer is operable to mix a second input signal derived from second signal with second cancelation signal to create a second output signal. | 10-04-2012 |
20120256676 | MIXER CIRCUIT - A driver circuit for supplying a drive signal to a mixer circuit comprising a first and second circuit branch and an operational amplifier. The first circuit branch receives an input signal and a bias signal. The second circuit branch receives the input signal. The operational amplifier has a first input connected to a junction node of the first circuit branch and a second input connected to a junction node of the second circuit branch. The operational amplifier is arranged to provide an operational amplifier output signal a second component of the second circuit branch so that a voltage at the junction node of the second circuit branch is equal to a voltage at the junction node of the first circuit branch. The voltage is dependent on the input signal and providing the drive signal. | 10-11-2012 |
20120268190 | LOCAL OSCILLATOR CLOCK SIGNALS - An apparatus and method for generating complementary periodic signals for a mixer circuit is provided. The apparatus comprises first and second generation circuits each for generating a periodic signal with a transition time on each rising edge different than a transition time on each falling edge. Each of the first and second generation circuits has an output for supplying its periodic signal to a mixer such that each rising edge of a periodic signal from one of the circuits crosses each falling edge of a periodic signal from the other of the circuits at a crossing point below a turn on voltage of the mixer. | 10-25-2012 |
20120280742 | 670 GHZ SCHOTTKY DIODE BASED SUBHARMONIC MIXER WITH CPW CIRCUITS AND 70 GHZ IF - A coplanar waveguide (CPW) based subharmonic mixer working at 670 GHz using GaAs Schottky diodes. One example of the mixer has a LO input, an RF input and an IF output. Another possible mixer has a LO input, and IF input and an RF output. Each input or output is connected to a coplanar waveguide with a matching network. A pair of antiparallel diodes provides a signal at twice the LO frequency, which is then mixed with a second signal to provide signals having sum and difference frequencies. The output signal of interest is received after passing through a bandpass filter tuned to the frequency range of interest. | 11-08-2012 |
20120293234 | PULSE SHAPER CIRCUIT WITH REDUCED ELECTROMAGNETIC EMISSION - In one embodiment, a circuit-based apparatus that operates on an input data stream includes delay-line circuitry that characterizes the input data stream, modified over time. A plurality of integrators provide a plurality of integrated signals in response to the delay-line circuitry, and a plurality of weighting amplifiers amplify the plurality of integrated signals by a plurality of respective time-varying weighting factors to provide weighted signals. A signal-combining circuit combines the weighted signals. The circuit-based apparatus also includes a plurality of parallel signal-processing circuit paths that couple the weighted signals to the signal-combining circuit. By combining the weighted signals from the parallel signal-processing circuit paths, the signal-combining circuit provides a signal representative of the input data stream. | 11-22-2012 |
20120299632 | SIMULTANEOUS SIGNAL INPUT MATCHING AND LINEARIZATION - An amplifier, mixer, and method for input impedance matching and linearization. The transconductor includes a first differential transistor and a second differential transistor, including a first differential source and a second differential source electrically connected at a source node. The transconductor includes a pair of transmission lines including a first line of the pair of transmission lines electrically connected to the first of the two differential voltage inputs and a second line of the pair of transmission lines electrically connected to the second of the two differential voltage inputs. The pair of transmission lines is electrically connecting the two differential voltage inputs at a common node. The transconductor also includes a linearization unit including one or more linearization transistors. The one or more linearization transistors include a linearization gate electrically connected to the common node. The linearization unit is configured to supply a virtual ground at the source node. | 11-29-2012 |
20130002333 | Receiver side combining in LINC Amplifier - A new method of combing signals of equal magnitude using the space-time (ST) 2×1 code at the receiver in a linear amplification with nonlinear components (LINC) is provided to obviate the combiner power loss and isolation requirements inherent in using traditional methods. | 01-03-2013 |
20130063199 | PROGRAMMABLE COMPLEX MIXER - Disclosed is a programmable complex mixer. In accordance with the embodiments of the present invention, it is possible to control an output by programming paths and signs of internal signals in a complex mixer to reduce a processing bandwidth, power consumption, and a chip area in a transceiver, thereby improving performance of a transceiver. | 03-14-2013 |
20130088277 | GENERATION OF BAND-LIMITED NOISE WITH TUNABLE CREST FACTOR - A method for generating a signal having a defined bandwidth and a desired crest factor is disclosed. The signal is composed of a number of individual sinusoidal signals, each having an amplitude and a frequency. The method includes determining an exponent to be used in a specific exponential function and corresponding to the desired crest factor, the exponent being determined based on an a priori known relationship between crest factor and exponent; calculating a phase value for each sinusoidal signal using the specific exponential function and the previously determined exponent; and superposing the sinusoidal signals to obtain the signal having the desired crest factor, whereby the phases of the individual signals are maintained. | 04-11-2013 |
20130135029 | ARCHITECTURE OF FUTURE OPEN WIRELESS ARCHITECTURE (OWA) RADIO SYSTEM - This invention relates to an open wireless architecture (OWA) radio frequency (RF) transceiver architecture including RF front-end system. Specifically, the invention relates to an OWA RF front-end utilizing non-broadband RF hardware to support wide range frequency bands and broad transmission bandwidth for future wireless communications. | 05-30-2013 |
20130135030 | Systems, Circuits and a Method for Generating a Configurable Feedback - A system can generate a configurable feedback. The system includes a number of circuitries that are coupled to a number of drivers and connected to each other in a chain via a single-wire connection. Control circuitry is connected to the plurality of circuitries and adapted to output configuration data to at least one circuitry of the plurality of circuitries to configure a feedback signal to be delivered by the plurality of circuitries to the control circuitry via the single-wire connection. | 05-30-2013 |
20130162319 | Active Hybrids for Antenna System - In various embodiments, a differential phase generating hybrid can comprise a first input port in communication with a first active splitter, a second input port in communication with a second active splitter, a first active combiner that can be configured to receive a first signal from the first active splitter and a second signal from the second active splitter. The differential phase generating hybrid can further comprise a second active combiner that can be configured to receive the first signal from the first active splitter and the second signal from the second active splitter. The differential phase generating hybrid can further comprise a first output port to provide a first composite signal from the first active combiner, and a second output port to provide a second composite signal from the second active combiner. The size of the differential phase generating hybrid can be independent of an operating frequency. | 06-27-2013 |
20130169341 | DETECTING RESPONSES OF MICRO-ELECTROMECHANICAL SYSTEM (MEMS) RESONATOR DEVICE - A system for detecting responses of a MEMS resonator device includes first and second signal sources, a signal divider and a frequency mixer. The first signal source provides a first signal and the second signal source provides a second signal that electrostatically drives the MEMS resonator device, causing mechanical vibration. The signal divider divides the first signal into a probe signal and a local oscillator (LO) signal, the probe signal being applied to the MEMS resonator device and reflected by a capacitance of the MEMS resonator device. A reflection coefficient is modulated onto the reflected probe signal at the mechanical resonance frequency by variations in the capacitance induced by the mechanical vibration of the MEMS resonator device. The frequency mixer mixes the reflected probe signal and the LO signal and outputs an intermediate frequency (IF) signal, which represents modulation of the reflection coefficient, providing an image of the mechanical vibration. | 07-04-2013 |
20130241625 | Multiway Lossless Power Combining and Outphasing Incorporating Transmission Lines - A power combining and outphasing system and related techniques for simultaneously providing both wide-bandwidth linear amplification and high average efficiency is described. Providing linear amplification encompasses the ability to dynamically control an RF output power level over a wide range while still operating over a wide frequency bandwidth. The system and techniques described herein also operate to maintain high efficiency across a wide range of output power levels, such that a high average efficiency can be achieved for highly modulated output waveforms. | 09-19-2013 |
20130249618 | SEAMLESS COARSE AND FINE DELAY STRUCTURE FOR HIGH PERFORMANCE DLL - A clock synchronization system and method avoids output clock jitter at high frequencies and also achieves a smooth phase transition at the boundary of the coarse and fine delays. The system may use a single coarse delay line configured to generate two intermediate clocks from the input reference clock and having a fixed phase difference therebetween. The coarse delay line may have a hierarchical or a non-hierarchical structure. A phase mixer receives these two intermediate clocks and generates the final output clock having a phase between the phases of the intermediate clocks. The coarse shifting in the delay line at high clock frequencies does not affect the phase relationship between the intermediate clocks fed into the phase mixer. The output clock from the phase mixer is time synchronized with the input reference clock and does not exhibit any jitter or noise even at high clock frequency inputs. Because of the rules governing abstracts, this abstract should not be used to construe the claims. | 09-26-2013 |
20130278320 | MIXER FOR MIXING INPUT SIGNAL WITH MULTIPLE OSCILLATING SIGNALS HAVING DIFFERENT PHASES AND RELATED MIXING METHOD THEREOF - A mixer includes a transformer and a mixing circuit. The transformer is employed for receiving an input signal to generate a differential output. The mixing circuit is coupled to the transformer, and employed for mixing the differential output with N oscillating signals having different phases to generate a plurality of mixed output signals, wherein N is greater than 2. | 10-24-2013 |
20130300489 | ADAPTABLE MIXER AND LOCAL OSCILLATOR DEVICES AND METHODS - An adaptable mixer device is operable in a first mode and a second mode and includes a first set of mixer units operable in the first mode and a second set of mixer units operable in the second mode. The second set of mixer units includes at least one mixer unit that is common to both the first set of mixer units and the second set of mixer units. The second set of mixer units also includes a plurality of mixer units that are not in the first set of mixer units. Similarly, the first set of mixer units including a plurality of mixer units that are not in the second set of mixer units. | 11-14-2013 |
20130300490 | RETURN-TYPE CURRENT-REUSE MIXER - A return-type current-reuse mixer having a transconductance/amplification stage, a mixing stage, and a high-pass and a low-pass filter network. The transconductance/amplification stage has a current-reuse CMOS topology wherein an input frequency signal is converted into a frequency current, low-frequency components are removed from the frequency current by the high-pass filter network, the frequency current is fed into the mixing stage, modulation occurs in the mixing stage, and then an intermediate-frequency signal is generated and output. Once high-frequency components are removed from the intermediate-frequency signal by the low-pass filter network, the intermediate-frequency signal is sent again for input into the transconductance/amplification stage, then amplified in the transconductance/amplification stage and output. The mixer transconductance/amplification stage employs a current-reuse technique. The input frequency and the output intermediate-frequency signal share a common transconductance/amplification stage. The mixer reduces power consumption, simplifies the circuit topology, and provides high conversion gain. | 11-14-2013 |
20130314142 | PHASE-COMBINING CIRCUIT AND TIMING SIGNAL GENERATOR CIRCUIT FOR CARRYING OUT A HIGH-SPEED SIGNAL TRANSMISSION - A phase-combining circuit for combining cyclic timing waveforms that have been phase-controlled by control signals based on three or more input signals of different phases, has a weight signal generating circuit and a weighting circuit. The weight signal generating circuit generates weights according to the control signals, and the weighting circuit gives the weights to the respective input signals, with a positive or negative polarity for each one signal. | 11-28-2013 |
20140028372 | FREQUENCY MIXING CIRCUIT AND METHOD FOR SUPPRESSING LOCAL OSCILLATION LEAKAGE IN FREQUENCY MIXING CIRCUIT - Embodiments of the present invention disclose a frequency mixing circuit and a method for suppressing local oscillation leakage in the frequency mixing circuit, where a mixed input signal and a local oscillation signal are involved, and local oscillation leakage can be effectively reduced by using a frequency mixing circuit whose structure is simpler and is easier to be implemented. The frequency mixing circuit includes a direct current bias circuit, where the direct current bias circuit includes a direct current bias voltage source used for reducing a local oscillation current. The frequency mixing circuit is mainly applied to frequency mixing, and especially to a case where an intermediate frequency signal is mixed with a local oscillation signal to output a radio frequency signal. | 01-30-2014 |
20140049309 | UP-CONVERSION MIXER HAVING A REDUCED THIRD ORDER HARMONIC - An up-conversion mixer includes a mixer cell having at least one output node configured to generate an output. The up-conversion mixer further includes a first cascaded transconductance input stage coupled to the mixer cell, the first cascaded transconductance input stage configured to receive an input signal and to reduce a third order harmonic of the output. The up-conversion mixer further includes a second cascaded transconductance input stage coupled to the mixer cell, the second cascaded transconductance input stage configured to receive the input signal and to reduce a third order harmonic of the output. | 02-20-2014 |
20140055189 | MIXER CIRCUIT, SEMICONDUCTOR DEVICE, RECEIVING CIRCUIT, RECEIVING DEVICE, AND COMMUNICATION DEVICE - According to an embodiment, a mixer circuit includes first transistors each having a charge storage layer, a second transistor, a group of first nodes, and an output node. The first transistors as a pair receive a differential signal having a first frequency. The second transistor receives a signal having a second frequency. The group of first nodes makes the charge storage layer of at least any one of the first transistors store charge during non-operation period during which the differential signal having the first frequency and the signal having the second frequency are not mixed and reduces loss of the charge during operation period during which those signals are mixed, to adjust a threshold voltage of at least any one of the first transistors from outside. The output node outputs a signal resulting from mixing the differential signal having the first frequency and the signal having the second frequency. | 02-27-2014 |
20140062574 | CONTROLLING OUTPUT POWER OF MULTIPLE-INPUT SINGLE-OUTPUT (MISO) DEVICE - Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency, and/or amplitude characteristics of the desired time-varying complex envelope signal. In another embodiment, a time-varying complex envelope signal is decomposed into a plurality of constant envelope constituent signals. The constituent signals are amplified equally or substantially equally, and then summed to construct an amplified version of the original time-varying envelope signal. Embodiments also perform frequency up-conversion. | 03-06-2014 |
20140070866 | MIXER AND ASSOCIATED SIGNAL CIRCUIT - A mixer for providing a mixed signal by mixing an input signal and an oscillation signal, comprising a follower and a switch. The follower is arranged to conduct a driving contribution from a bias terminal to an output terminal following a signal at an input terminal, wherein the input terminal and the bias terminal are respectively coupled to the input signal and the oscillation signal, and the output terminal is arranged to output the mixed signal. The switch is arranged to selectively conduct the output terminal to a reference level in response to alternating of the oscillation signal. An associated signal circuit is also disclosed. | 03-13-2014 |
20140070867 | CIRCUIT FOR COMBINING SIGNALS - Signals generated by an array of photodiodes are applied to the inputs of corresponding edge detection circuits. Each edge detection circuit generates an output that changes state in response to a detected edge of the photodiode generated signal. The edge detection circuits may be formed by toggle flip-flop circuits. The outputs of the edge detection circuits are logically combined using exclusive OR logic to generate an output. The exclusive OR logic may be formed by a cascaded tree of exclusive OR circuits. | 03-13-2014 |
20140091848 | DIRECT SAMPLING CIRCUIT AND RECEIVER - A sampling circuit is provided that includes a first sampling circuit that shifts a frequency, at which a gain of a frequency characteristic is maximized, to a lower frequency side, and a second sampling circuit that shifts the frequency, at which the gain of the frequency characteristic is maximized, to a higher frequency side. The sampling circuit also includes an output section provided in an output side of the first sampling circuit and an output side of the second sampling circuit, and outputs a sum or a difference between an output from the first sampling circuit and an output from the second sampling circuit. | 04-03-2014 |
20140091849 | WIDEBAND DOUBLE BALANCED IMAGE REJECT MIXER - A double balanced image reject mixer (IRM) can be configured to comprise: a common radio frequency (RF) port; four mixer devices, each comprising an intermediate frequency (IF) port, an RF port and an local oscillator (LO) port; and a four-way, in-phase splitter/combiner. The four-way, in-phase splitter/combiner can be connected between the RF common port and the RF port of each of the four mixer devices. A method of performing spurious suppression and image reject mixing in a double balanced IRM, can comprise: directly in-phase combining radio frequency (RF) output signals of four mixer devices located in the double balanced IRM; and phase pairing local oscillator (LO) signals and intermediate frequency (IF) signals such that the combination of the phases of the respective IF and LO signals can result in substantially equal phase RF signals at the RF ports of all four mixer devices. | 04-03-2014 |
20140159796 | MIXER - A mixer includes a first node to which an intermediate frequency (IF) signal is input; first and second transistors that respectively have control terminals supplied with local signals having mutually opposite phases and output terminals connected to the first node; a first filter that is connected between the output terminal of the second transistor and the first node and suppresses passage of the IF signal; a second node to which the IF signal is input; third and fourth transistors that respectively have control terminals supplied with local signals having mutually opposite phases and output terminals connected to the second node; a second filter that is connected between the output terminal of the fourth transistor and the second node and suppresses passage of the IF signal; and a combiner combining a signal output from the first node and a signal output from the second node. | 06-12-2014 |
20140176224 | Mixer Circuit - A switching circuit is linearized by using a capacitor to apply a drive voltage to an FET, wherein the drive voltage is independent of the signal switched by the switching circuit. | 06-26-2014 |
20140210542 | POWER SPLITTER AND COMBINER - An electronic device is described, the device including a first circuit arranged to transfer a signal with a first predetermined phase shift, a second circuit, connected in series with the first circuit, arranged to transfer a signal with a second predetermined phase shift, and a resistance connected in parallel with the first and second circuits, wherein the first circuit includes a first capacitance connected between a first pair of nodes, a second capacitance connected between a second pair of nodes, and a first transformer having a first winding connected between the first pair of nodes and a second winding connected between the second pair of nodes. | 07-31-2014 |
20140247083 | RECEIVING DEVICE - A receiving device includes a dividing circuit, N pieces of internal circuits, and an averaging circuit. The dividing circuit is configured to divide an input signal into N pieces of divided signals (where N is an integer of two or larger), and the N pieces of internal circuits are configured to receive and process the N pieces of divided signals. The averaging circuit is configured to receive N pieces of output signals from the N pieces of internal circuits, averaging the output signals, and output an averaged signal. | 09-04-2014 |
20140266390 | TRANSCONDUCTANCE CIRCUIT AND FREQUENCY MIXER - The present invention provides a transconductance circuit and a frequency mixer. The transconductance circuit includes: a first transistor, a second transistor, a first impedor, a second impedor, a first input network, and a second input network, where a gate of the first transistor is connected to a source of the second transistor through the first input network and the first impedor; and a gate of the second transistor is connected to a source of the first transistor through the second input network and the second impedor. The present invention can enable a current that passes through a transconductance circuit to be reused between a first transistor and a second transistor, thereby improving the gain efficiency of the transconductance circuit and improving performance of the transconductance circuit. | 09-18-2014 |
20150070071 | HARMONIC REJECTION MIXER ARRANGEMENT - It is disclosed a mixer arrangement for complex signal mixing comprising a first harmonic rejection mixer, and a second harmonic rejection mixer. Each of the harmonic rejection mixers comprises mixer unit cells wherein each mixer unit cell comprises a differential input, transconductance elements corresponding to the differential input, and a switching network arranged to switch signals from the transconductance elements to a differential output, and the first and the second harmonic rejection mixers have mutual quadrature phase relationship. The first and the second rejection mixer share a plurality of mixer unit cell, each comprising an input for receiving a signal to be mixed, an input for receiving control signals derived from a local oscillator signal, and one output for each of the first and second harmonic rejection mixers. A radio circuit comprising such a mixer arrangement and a communication apparatus comprising such a radio circuit are also disclosed. | 03-12-2015 |
20150295554 | SIGNAL CONVERSION WITH GAIN IN THE FORWARD PATH - A system and method of frequency conversion or demodulation can be used in wireless environments. A demodulator or frequency converter can include a forward mixer path including an amplifier, a first mixer, a first input, a second input, and a first output. The forward mixer path can be configured to receive a first radio frequency signal at the first input, receive an oscillator signal at the second input and provide a baseband signal. The first mixer can configured to provide a gain. | 10-15-2015 |
20150341014 | Broadband Integrated RF/Microwave/Millimeter Mixer with Integrated Balun(s) - A broadband radio frequency, microwave, or millimeter mixer system may include a balun and a mixer. The balun may have an unbalanced port; a balanced port; a first and a second inductor tightly and inversely magnetically coupled to one another; and a third inductor which is not magnetically coupled to the first or the second inductors. The mixer may be connected to the balanced port of the balun. The balun, including its three inductors, and the mixer may all be integrated onto a single substrate that forms an integrated circuit. | 11-26-2015 |
20160056764 | Method and Apparatus to Detect LO Leakage and Image Rejection using a Single Transistor - LO leakage and Image are common and undesirable effects in typical transmitters. Typically, thirty complex hardware and algorithms are used to calibrate and reduce these two impairments. A single transistor that draws essentially no de current and occupies a very small area, is used to detect the LO leakage and Image Rejection signals. The single transistor operating as a square law device, is used to mix the signals at the input and output ports of the power amplifier (PA). The mixed signal generated by the single transistor enables the simultaneous calibration of the LO leakage and Image Rejection. | 02-25-2016 |
20160079922 | MIXER CIRCUIT - A mixer circuit includes a single-ended to differential converter, first and second transistors, first to fourth inductive transmission lines, and a mixer. The first and second transistors receive a differential input voltage signal pair from the single-ended to differential converter and generate a differential input current signal pair. The mixer mixes the differential input current signal pair with a differential oscillatory voltage signal pair. The first and second inductive transmission lines are configured such that an equivalent input impedance seen into the first and second transistors matches an equivalent output impedance seen into the first single-ended to differential converter. | 03-17-2016 |
20160112007 | Multiple-Input Multiple-Output Low-Noise Block Downconverter and Low-Noise Module - A low-noise block downconverter (LNB) is disclosed. The low-noise block downconverter comprises a first input module, for outputting a first intermediate frequency (IF) signal after receiving a first polarization signal via a first input end; a second input module, for outputting a second IF signal after receiving a second polarization signal via a second input end; a first output module, coupled to the first input module, for amplifying the first IF signal; and a second output module, coupled to the second input module, for amplifying the second IF signal, such that the LNB selectively outputs a first user signal or a second user signal. | 04-21-2016 |
20160126893 | QUADRATURE MIXER ARRANGEMENT - A quadrature mixer arrangement is disclosed, which is adapted to translate an input signal by a translation frequency. The mixer arrangement is operated at a clock rate that equals the translation frequency times an oversampling rate, wherein the oversampling rate is not a multiple of four. The mixer arrangement comprises a sequence generator, at least one pair of mixers, and one or more correction networks. The sequence generator generates an in-phase mixer translation sequence and a quadrature-phase mixer translation sequence based on the oversampling rate. The in-phase mixer translation sequence is a time-discrete representation of a translation frequency sinusoidal function sampled at the clock rate, and the quadrature-phase mixer translation sequence is a time-discrete representation of the translation frequency sinusoidal function phase-shifted by π/2 plus a phase deviation and sampled at the clock rate, wherein the phase deviation is a function of the oversampling rate. Each pair of mixers comprises an in-phase mixer and a quadrature-phase mixer, each adapted to translate a respective input signal based on the respective translation frequency. The one or more correction networks are adapted to, based on the oversampling rate and the phase deviation, compensate for the phase deviation by adjusting at least one of the in-phase mixer input signal, the quadrature-phase mixer input signal, the in-phase mixer output signal, and the quadrature-phase mixer output signal. | 05-05-2016 |
20160181981 | SWITCHING CIRCUIT | 06-23-2016 |
20160190988 | MIXER - A mixer includes a transconductance unit, a gain boost unit, a mixing module and a buffer. The transconductance unit converts a differential input voltage signal pair into a differential input current signal pair. The gain boost unit generates an auxiliary current signal pair that constitutes a portion of the differential input current signal pair. The mixing module mixes a remaining portion of the differential input current signal pair with a differential oscillatory voltage signal pair to generate a differential mixed voltage signal pair. The buffer performs buffering on the differential mixed voltage signal pair. | 06-30-2016 |
20160197583 | BALANCED UP-CONVERSION MIXER | 07-07-2016 |
20170237399 | ALTERNATING ANTI-PARALLEL DIODE MIXER STRUCTURE | 08-17-2017 |