| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 332144000 | PHASE MODULATOR | 32 |
| 20080297270 | Driver circuit of optical modulator - A drive signal generation unit generates first and second drive signals for driving first and second phase modulators of a DQPSK optical modulator. First and second regeneration circuits regenerate the first and second drive signals with respect to clock signals. The first and second phase modulators are driven by the regenerated first and second drive signals. The amplitude of the first drive signal is adjusted by a first attenuator. The clock signal for the second regeneration circuit is applied after attenuated by a second attenuator. The delay time caused by the first attenuator is the same as the delay time caused by the second attenuator. | 12-04-2008 |
| 20090160572 | COMMUNICATION APPARATUS - A communication apparatus has a local oscillator which performs phase modulation based on a phase component of a baseband signal and outputs a phase modulated signal, a controlling circuit which is supplied with an integer portion included in an amplitude component of the baseband signal and generates and outputs a controlling signal based on a size of the integer portion, a subtractor which is supplied with the integer portion and the controlling signal, subtracts a value of the controlling signal from the integer portion, and outputs a result, a MASH (Multi-stAge-noise-Shaping) circuit which is a second-order delta-sigma modulation means supplied with a fractional portion of the amplitude component, an order of the MASH circuit being switchable between a first order and a second order based on the controlling signal, and an amplifier which sets a voltage value based on an output of the MASH circuit and an output of the subtractor, multiplies the voltage value and the phase modulated signal, and outputs a result. | 06-25-2009 |
| 20090309670 | Switched Bands Phase Shifter - A multiband phase shifter (MBPS) consists of at least two band phase shifters (BPSs). Each BPS has characteristic operating bandwidth such that the respective central frequency of the operating bandwidth of any such BPS is different than the other central frequencies of the other operating bandwidth associated with other BPS respectively. The MBPS input signal can be switched to any of the BPS while a switch controller controls the switching. | 12-17-2009 |
| 20100026407 | MODULATOR - It is possible to restrain distortions generated in a mixer. A modulator includes a local signal source that generates an in-phase local signal, a multiplier that multiplies an in-phase baseband signal (I) and the in-phase local signal by each other, a phase inverter that receives the in-phase local signal from the local signal source, and inverts the phase thereof, an anti-phase multiplier that multiplies an anti-phase baseband signal (−I) (signal equivalent to a signal obtained by inverting the phase of the in-phase baseband signal (I)) and an output from the phase inverter (anti-phase local signal) by each other, and an adder that adds an output from the multiplier and an output from the anti-phase multiplier to each other. The addition by the adder of a leak component (carrier leak) which is the in-phase local signal leaked from the multiplier, and the signal which is the output from the phase inverter leaked from the anti-phase multiplier to each other results in zero. In other words, the leak component output from the multiplier is cancelled. | 02-04-2010 |
| 20100109788 | Driver circuit - In a driver circuit | 05-06-2010 |
| 20100176893 | MODULATION DEVICE AND PULSE WAVE GENERATION DEVICE - Provided is a modulation device including a signal selection circuit selecting two carrier signals from a plurality of carrier signals having the same frequency and the same phase difference according to a defined control signal and outputting the selected carrier signals, and a phase interpolator adjusting the phase in smaller units than the phase difference between the plurality of carrier signals according to the control signal and modulating the frequency or the phase of the carrier signal into a baseband signal based on the carrier signals selected by the signal selection circuit to generate a carrier wave signal. | 07-15-2010 |
| 20100231314 | RADIO FREQUENCY PWM & PPM MODULATOR - The present invention relates in general to transferring the envelope information of a polar modulated signal to a varying pulsewidth signal, while the phase modulation is direct transferred to the phase modulation of this PWM signal. Accordingly, the resultant signal is a PWM-PPM-signal. Such a signal can efficiently amplified by use of switching amplifying stages. By the present invention four pre-distorted baseband signals are applied basically to 4 linear RF mixers and a two adders, which are, the only needed external RF building blocks to build the modulator according to the invention. That is, the basic idea of the invention resides in the way of modulation of the four baseband signals and the way of combining of the RF modulated signals. | 09-16-2010 |
| 20100231315 | WIDEBAND PHASE MODULATOR - An apparatus for phase modulation includes a delay locked loop configured to generate from a reference signal a plurality of phase shifted signals, each of the phase shifted signals being locked to the reference signal and having a different phase shift from the other phase shifted signals with respect to the reference signal, and a multiplexer configured to select one of the phase shifted signals. | 09-16-2010 |
| 20100244976 | Clock Spreading Systems and Methods - Clock spreading systems and methods are disclosed. In one embodiment of the invention, a clock spreading system is provided in an integrated transceiver system that comprises a base band control system and a transceiver coupled to the base band control system. The clock spreading system provides a spread clock output signal derived from a clock reference signal for clocking one of the base band control system and the transceiver. The clock spreading system is configured to provide a periodic phase modulated spread clock output signal during receiving of data in a receive mode and a pseudo-random phase modulated spread clock output signal during transmitting of data in a transmit mode. | 09-30-2010 |
| 20100295628 | Apparatus, method and computer program - An apparatus, method and computer program, the apparatus including: a modulator including a first input for receiving a data signal and a second input for receiving an output signal from a phase locked loop wherein the modulator is for modulating the output signal from the phase locked loop using the data signal and providing the modulated signal to an output for connection to an amplifier; and a phase shifter configured to result in a predetermined phase shift to the modulated signal. | 11-25-2010 |
| 20110057739 | BI-PHASE MODULATOR APPARATUS AND METHOD - A bi-phase modulator including a driver and a mixer. The driver includes a prescaler having an input for receiving a signal and an output for outputting a baseband signal. The mixer includes a mixer having an input coupled to the output of the prescaler for receiving the baseband signal output by the prescaler. The baseband signal output by the prescaler drives the mixer so as to output a modulated waveform from an output of the mixer. | 03-10-2011 |
| 20110227662 | HYBRID MODULATION METHOD FOR PARAMETRIC AUDIO SYSTEM - A parametric audio system that permits greater control over the bandwidth of a modulated signal. The system includes a carrier signal generator for generating a carrier signal, at least one audio signal source for generating at least one audio signal, and a modulation component for generating an envelope signal based on the at least one audio signal, modulating the phase of the carrier signal based on a predetermined function to generate a first modulated signal, and multiplying the envelope signal and the first modulated signal to generate a second modulated signal. By selection of the predetermined function, the modulation component can alter the spectrum of the second modulated signal, thereby permitting greater control over the bandwidth of the second modulated signal. | 09-22-2011 |
| 20120062331 | SYSTEM, METHOD AND APPARATUS FOR AN OPEN LOOP CALIBRATED PHASE WRAPPING PHASE MODULATOR FOR WIDEBAND RF OUTPHASING/POLAR TRANSMITTERS - A device article and method for an open loop calibrated phase wrapping phase modulator. A tapped delay line may provide a coarse resolution for one or more phases of a signal. A phase multiplexer may receive one or more coarse phases from the tapped delay line and select a coarse phase to send to the digitally controlled delay line. A digitally controlled delay line may provide a fine resolution to the coarse phase from the phase multiplexer. | 03-15-2012 |
| 20120146740 | SEMICONDUCTOR DEVICE - The present invention provides a semiconductor device. In the semiconductor device, a signal distributor distributes a high frequency signal generated by an oscillator and inputted to an input part to first and second signals and outputs the same from first and second output parts respectively. A modulator modulates a baseband signal with the first signal and outputs the same therefrom. An offset adjustment unit compares the second signal and the first signal that leaks from the output of the modulator to thereby adjust an offset of the baseband signal. The signal distributor includes a first capacitive element provided between the input part and the first output part, and a second capacitive element provided between the first output part and the second output part. The electrostatic capacitance of the first capacitive element is larger than that of the second capacitive element. | 06-14-2012 |
| 20120200367 | WIDE BAND POLAR MODULATOR - Some aspects of the present disclosure provide for polar modulation techniques that utilize an 180° phase shift module disposed downstream of a VCO-DCO. In some embodiments, this configuration allows a polar modulator to use the VCO-DCO to achieve small phase shifts (e.g., less than or equal to) 90°), while carrying out 180° phase shifts in the 180° phase shift module downstream of the VCO-DCO. | 08-09-2012 |
| 20120229227 | VECTOR MODULATOR USING TIME DELAY AND PHASE SHIFTER - An vector modulator using a time delay and a phase shifter is disclosed, the vector modulator including a time delay ( | 09-13-2012 |
| 20130154755 | METHOD AND APPARATUS FOR IMPROVED HIGH ORDER MODULATION - Methods, systems and software are provided for high order signal modulation based on improved signal constellation and bit labeling designs for enhanced performance characteristics, including decreased power consumption. According to the improved signal constellation and bit labeling designs for enhanced performance characteristics, designs for 8-ary, 16-ary, 32-ary and 64-ary signal constellations are provided. According to an 8-ary constellation, improved bit labeling and bit coordinates are provided for a 1+7APSK signal constellation. According to a 16-ary constellation, improved bit labeling and bit coordinates are provided for a 6+10APSK signal constellation. According to three 32-ary constellations, improved bit labeling and bit coordinates are provided for a 16+16APSK signal constellation and two 4+12+16APSK signal constellations. According to two 64-ary constellations, improved bit labeling and bit coordinates are provided for an 8+16+20+20APSK signal constellation and a 12+16+16+20APSK signal constellation. | 06-20-2013 |
| 20130154756 | METHOD FOR THE PHASE MODULATION OF A CARRIER SIGNAL TRANSMITTED FROM A TRANSMITTER TO A CONTACTLESS TRANSPONDER, AND DEVICE FOR IMPLEMENTING SAME - A method for phase modulation of a carrier signal from a transmitter to a contactless transponder in which data is coded as consecutive symbols, each corresponding to a predefined number of carrier cycles, and in which a symbol time is at least two cycles of the carrier signal includes, at the transmitter, spreading a phase jump of a symbol in relation to a preceding symbol over a first part of the symbol time. The establishment of the phase jump is completed in the first part of the symbol time. The periods of the cycles are constant during a second part of the symbol time. | 06-20-2013 |
| 20130234803 | HIGH-FREQUENCY, HIGH-SPEED PRECISION DIGITAL BI-PHASE MODULATOR AND METHOD FOR BI-PHASE MODULATION - Embodiments of digital high-speed bi-phase modulator and method for bi-phase modulation are generally described herein. In some embodiments, the digital high-speed bi-phase modulator comprises a high-speed digital divider, a high-speed digital multiplexer, and matched signal paths provided between the divider and the multiplexer. The high-speed digital divider is configured to receive a carrier signal and generate complementary output signals. The high-speed digital multiplexer is configured to switch between the complementary output signals and generate a bi-phase modulated output at a carrier frequency (f | 09-12-2013 |
| 20140070902 | BINARY BI-PHASE SHIFT MODULATOR - A binary bi-phase shift modulator having an input piezoelectric transducer and an output piezoelectric transducer connected in series between a radio frequency input and a radio frequency output. A fixed DC pole voltage having a first polarity is connected to one of the transducers. A DC switched pole voltage is connected to the other transducer which switches between the pole voltage of the first polarity arid a pole voltage of the opposite polarity m accordance with a dinar data signal The polarity of the radio frequency input relative to the radio frequency output varies as a function of the polarity of the DC switched pole voltage. | 03-13-2014 |
| 332145000 | Including amplitude modulator | 11 |
| 20080246550 | Selective envelope modulation enabling reduced current consumption - A modulation system includes an amplitude modulation path and a phase modulation path coupled to the amplitude modulation path. One of the amplitude modulation path and the phase modulation path receive a reduced current such that the reduced current reduces power consumption by the system. Preferably, the amplitude modulation path receives the reduced current. The amplitude modulation path has a first set of components and a second set of components. The first set of components consumes less power by using slower operation. The second set of components consumes less power by effectively not operating, or being turned off. | 10-09-2008 |
| 20090039974 | POLAR MODULATION APPARATUS - Provided is a polar modulation apparatus capable of performing power limit with a simple configuration even when controlling a transmission power and increasing the transmission signal output power control range. A polar modulation device ( | 02-12-2009 |
| 20090072921 | Polar Modulation Without Analog Filtering - This disclosure relates to systems and methods for polar modulation without analog filters. Digitals filters, a second order hold interpolator and a reconfigurable third order noise shaper can be used instead of the analog filters used in conventional polar modulators. The polar modulator receives either receives the input in polar coordinates or converts the signal into polar phase and amplitude components. The phase and amplitude components are processed separately using digital signal processing components including digital filters, PLL, interpolator and noise shaper. The processed phase and amplitude components are then mixed to generate the modulated signal. | 03-19-2009 |
| 20090079511 | Polar Modulation Transmission Circuit and Communication Device - A transmission circuit for outputting transmission signals with a low distortion and a high efficiency over a wide range of output power is provided. A signal generation section ( | 03-26-2009 |
| 20090251231 | POLAR FEEDBACK ARCHITECTURE - Polar feedback architecture. A polar modulator, as may be implemented within a transmitter module, of a communication device includes feedback. This feedback involves monitoring of phase information and magnitude/amplitude information of an output signal generated by the polar modulator. The output signal can be a radio frequency (RF) signal such as may be transmitted via a communication channel within a communication system. A baseband processing module processes the monitored phase information and magnitude/amplitude information to perform adjustment of a phase modulator and/or other components within the polar modulator. | 10-08-2009 |
| 20100321126 | Method of Modulating A Carrier to Transmit Power to a Device, and Modulator Adapted to do the Same - A receiver for recovering timing and data information from a signal, comprising an envelope detector for demodulating the signal; to produce a demodulated signal; a filter for filtering the demodulated signal to remove or attenuate amplitude variations due to the timing information so as to produce a data signal; and a timing recovery circuit for forming a difference between time aligned versions of the demodulated signal and the data signal so as to recover the timing information. | 12-23-2010 |
| 20110163822 | POWER AMPLIFIER - A power amplifier that amplifies an RF modulation signal containing an amplitude modulation component and a phase modulation component, including a polar modulator that outputs an amplitude component signal that is the amplitude modulation component of the RF modulation signal, a direct current power supply that outputs a direct current voltage, a pulse modulator that pulse-modulates the amplitude component signal, a pulse amplification circuit that amplifies a pulse modulation signal, a combining circuit that adds a direct current voltage that is outputted from the direct current power supply to an output signal of the pulse amplification circuit, a low pass filter that smoothens an output signal of the combining circuit, and an RF amplifier that not only amplifies the RF modulation signal, but also amplitude-modulates the amplified signal with an output signal of the low pass filter and outputs the resultant signal. | 07-07-2011 |
| 20110187473 | METHOD AND SYSTEM FOR POLAR MODULATING QAM SIGNALS WITH DISCONTINUOUS PHASE - Aspects of a method and system for polar modulating QAM signals with discontinuous phase may include amplifying a signal via a plurality of amplifiers such that a combined gain of the plurality of amplifiers comprises a coarse amplitude gain and an amplitude offset gain. A gain of one or more of the plurality of amplifiers may be adjusted to set the coarse amplitude gain, and a gain of one or more remaining ones of the plurality of amplifiers may be adjusted to set the amplitude offset gain. The setting of the coarse amplitude gain and/or said amplitude offset gain may be adjusted dynamically and/or adaptively. The signal may be generated by phase-modulation of a radio-frequency carrier. The combined gain of the plurality of amplifiers may be controlled based on a desired amplitude modulation. The plurality of amplifiers may be integrated within an integrated circuit (IC) or chip. | 08-04-2011 |
| 20120105166 | GENERATOR OF A MODULATED RADIOFREQUENCY SIGNAL, METHOD FOR CALIBRATING THE GENERATOR, AND MAGNETIC RESONANCE IMAGING SYSTEM - A generator of a high-power modulated signal, a method for calibrating the generator, and a magnetic resonance imaging system. The generator includes means for generating a sinewave signal phase-shifted by a first variable value relative to a phase reference and a sinewave signal phase-shifted by a given fixed value added to a second variable value relative to the phase reference, the second variable value opposite to the first variable value relative to the phase reference, the variable values representative of the modulation of the radiofrequency signal, the two sinewave signals being of constant amplitude, two amplifiers each amplifying one of the sinewave signals in a congested regime, and a fixed phase shifter with a value equal to the given value of the means to generate the two sinewave signals, the fixed phase shifter coupling the signals originating from the two amplifiers to deliver the modulated radiofrequency signal. | 05-03-2012 |
| 20120112847 | POLAR MODULATION TRANSMISSION CIRCUIT AND POLAR MODULATION TRANSMISSION METHOD - Disclosed is a polar modulation transmission circuit wherein distortion components resulting from variations between individual amplifiers are compensated for with few man-hours, and deterioration in signal quality is effectively suppressed. A frequency converter ( | 05-10-2012 |
| 20180026581 | Piezoelectric Resonance Controlled Terahertz Wave Modulators | 01-25-2018 |
| 332146000 | Including discrete semiconductor device | 1 |
| 20100225409 | IQ-Modulation - The present disclosure relates to I/Q modulation circuits, devices, and methods. | 09-09-2010 |
