Patent application number | Description | Published |
20080278250 | System and method for increasing frequency tuning range - System and method for increasing the frequency tuning range of a RF/microwave LC oscillator. An electronic communications device includes a controller to regulate the operation of the electronic communications device, a modem coupled to the controller, a radio frequency unit coupled to the controller and to the modem, an oscillator coupled to the controller and to the radio frequency unit, and an amplifier coupled to the radio frequency unit. The oscillator produces a timing and reference signal for the radio frequency unit based on control information from the controller. The oscillator includes a multi-tap inductor that may controllably alter its effective inductance to change the timing and reference signal provided to the radio frequency unit. | 11-13-2008 |
20090168387 | Packaged Integrated Circuits Having Inductors and Methods to Form Inductors in Packaged Integrated Circuits - Packaged integrated circuits having inductors and methods to form inductors in packaged integrated circuits are disclosed. An example method comprises forming a substrate having a first trace and a contact, attaching an integrated circuit to the substrate over the first trace, and electrically coupling the first trace to the contact via an electrical conductor that extends over the integrated circuit to form the inductor in the packaged integrated circuit. | 07-02-2009 |
20090175378 | System and Method for Impedance Mismatch Compensation in Digital Communications Systems - A system and method for digitally providing impedance mismatch compensation for a communications medium in a communications device. A method comprises producing a power amplifier (PA) output signal, providing the PA output signal to a digitally-controlled transmission line (DCTL), transforming a first load impedance to a second load impedance producing a DCTL output, and coupling the DCTL output to an antenna. The PA having the first load impedance and the transforming is controlled by a digital control word provided to the DCTL. | 07-09-2009 |
20090184771 | Systems and Methods for Reducing Flicker Noise in an Oscillator - Various systems and methods for implementing dynamic logic are disclosed herein. For example, some embodiments of the present invention provide LC tank circuits having an inductance and a capacitance. In addition, the circuits include a flicker noise reducing switch that is operable to selectively incorporate the capacitance such that an output of the circuit operates at a frequency based on a combination of the inductance and the capacitance. | 07-23-2009 |
20100226056 | METHODOLOGY TO GUARD ESD PROTECTION CIRCUITS AGAINST PRECHARGE EFFECTS - An ESD protection circuit ( | 09-09-2010 |
20110101955 | SYSTEM AND METHOD FOR IMPLEMENTING LOW-COST ELECTRONIC GYROSCOPES AND ACCELEROMETER - Accelerometers have a number of wide-ranging uses, and it is desirable to both increase their accuracy while decreasing size. Here, millimeter or sub-millimeter wavelength accelerometers are provided which has the advantage of having the high accuracy of an optical accelerometer, while being compact. Additionally, because millimeter or sub-millimeter wavelength signals are employed, cumbersome and awkward on-chip optical devices and bulky optical mediums can be avoided. | 05-05-2011 |
20110291754 | Segmented Power Amplifier with Varying Segment Activation - Various apparatuses and methods for varying segment activation in a segmented power amplifier are disclosed herein. For example, some embodiments provide a power amplifier including an input, an output, a plurality of amplifier segments and a controller. The amplifier segments are connected in parallel between the input and the output and are adapted to be activated and inactivated. The power level at the output may be controlled by changing a number of the amplifier segments that are activated concurrently. The controller is connected to the amplifier segments and is adapted to vary which of the amplifier segments are activated to arrive at a selected number of activated amplifier segments. | 12-01-2011 |
20120151994 | ACTIVE DETECTION TECHNIQUES FOR PHOTOACOUSTIC SENSORS - Traditional photoacoustic sensors generally operate in a passive mode, which can degrade the performance. Here, however, a photoacoustic sensor has been disclosed that operates an acoustic resonance chamber and a transducer in an active mode so as to avoid the problems associated with traditional photoacoustic sensors; in particular, because the acoustic resonance chamber operates at near atmospheric pressure such as 100's Torr as opposed to 1 m Torr type of pressure for radio spectroscopy, the sensor is allowed to be scaled to operate on an integrated circuit or IC. | 06-21-2012 |
20120306475 | SYSTEM AND METHOD FOR IMPLEMENTING LOW-COST ELECTRONIC GYROSCOPES AND ACCELEROMETER - Accelerometers have a number of wide-ranging uses, and it is desirable to both increase their accuracy while decreasing size. Here, millimeter or sub-millimeter wavelength accelerometers are provided which has the advantage of having the high accuracy of an optical accelerometer, while being compact. Additionally, because millimeter or sub-millimeter wavelength signals are employed, cumbersome and awkward on-chip optical devices and bulky optical mediums can be avoided. | 12-06-2012 |
20130300478 | Method and Associated Apparatus for Clock-Data Edge Alignment - An edge alignment apparatus includes: a signal source, for generating a first and a second square wave signals; a phase delay circuit, for receiving the first and the second square wave signals to generate a delayed first and a delayed second square wave signals; a data circuit, for generating a third square wave signal according to the delayed second square wave signal; and a phase calibrating circuit, for receiving the third square wave signal and the delayed first squared wave signal to generate at least one phase tuning signal to the phase delay circuit for tuning a phase difference between the delayed first and the delayed second square wave signals, such that a signal edge of the third square wave signal aligns with that of the first square wave signal. The first, second and third square wave signals have a same frequency. | 11-14-2013 |
20130344838 | LOW-NOISE AMPLIFIERS FOR RF RECEIVER - Disclosed are low-noise amplifiers and SAW-less receivers. An exemplary amplifier includes at least two amplifier modules. The amplifier modules share a common output node and comprise a common input to which the amplifier modules are AC or DC coupled for receiving an inbound RF signal. The amplifier modules operate at different biases. | 12-26-2013 |
20140118081 | Multiplexed Configurable Sigma Delta Modulators for Noise Shaping in a 25-Percent Duty Cycle Digital Transmitter - A modulator generates a baseband digital signal from an information-bearing digital signal. The baseband signal has time-varying phase and amplitude defined by a sequence of complex data words, each having an in-phase (I) component and a quadrature (Q) component. A noise-shaping modulator generates a noise-shaped digital signal from the baseband digital signal such that quantization noise in the noise-shaping modulator is attenuated by a spectral null of its noise transfer function. The spectral null is selected by a noise-shaping parameter corresponding to a selected one of a plurality of output frequencies. A signal converter generates an analog signal conveying the information of the information-bearing digital signal on an analog carrier signal having the selected output frequency. | 05-01-2014 |
20140126669 | Digital Frequency Modulation Aided AMPM Predistortion Digital Transmitter - Amplitude-modulation (AM) to AM (AMAM) predistortion data is obtained from an AMAM predistorter. When applied to a digital quadrature signal, the AMAM predistortion data predistorts in-phase (I) and quadrature (Q) data words in a digital quadrature modulator. AM to phase-modulation (AMPM) predistortion data is obtained that is associated with the AMAM predistortion data and a frequency change or a phase shift in a local oscillator (LO) signal is compelled in accordance with the AMPM predistortion data. The frequency-changed or phase-shifted LO signal is provided to a digital upconverter such that an output signal of the digital upconverter is linearized with respect to at least phase distortion in the digital upconverter. | 05-08-2014 |
20140170997 | POWER AMPLIFYING APPARATUS AND WIRELESS SIGNAL TRANSMITTER UTILIZING THE SAME - A power amplifying apparatus is provided. A reference signal generator provides a reference signal having an enabling state and a disabling state. A digital power amplifier generates a current based on the reference signal and an input signal. An output signal of the digital power amplifier is related to the current. When the reference signal is in the enabling state, the current is related to the input signal. When the reference signal is in the disabling state, the current is irrelevant to the input signal. During the enabling state of the reference signal, a data generator provides an output alternating between an in-phase signal and a quadrature-phase signal as the input signal to the digital power amplifier. When the reference signal is in the disabling state, the data generator provides a fixed signal as the input signal to the digital power amplifier. | 06-19-2014 |
20140348264 | DIGITAL TRANSMITTER AND METHOD FOR CALIBRATING DIGITAL TRANSMITTER - A digital transmitter includes: a plurality of adjustable delay lines arranged to delay a plurality of digital input signals by a plurality of delay times to generate a plurality of delayed digital input signals respectively; a plurality of converting devices arranged to convert the plurality of delayed digital input signals into a plurality of converting signals respectively; and a calibration device arranged to adjust a delay time of at least one adjustable delay line in the plurality of adjustable delay lines to make the plurality of converting devices convert the plurality of delayed digital input signals at respective desire time points. | 11-27-2014 |
20150024695 | TRANSCEIVERS WITH A TRANSFORMER SUPPORTING MULTIBAND OPERATION - Several multiband transceivers are disclosed. An exemplified multiband transceiver supporting different bands has a transformer, an inbound switch circuit, and an outbound switch circuit. The transformer has input ports on a primary side, and output ports on a secondary side. The input ports are direct-current isolated from and magnetically coupled to the output ports. The inbound switch circuit is configured to connect one of the input ports with an RF signal source for signal transmission. The outbound switch circuit is configured to connect one of the output ports with a RF output load. Optionally, an input tunable capacitor is configured to shunt with the effective inductance of one of the input ports and form a LC tank for band selection. | 01-22-2015 |