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US20120057385 POWER CONTROL CIRCUIT  
This invention relates to a power control circuit, and, an inventive PWM controller, switching circuit, high voltage discharge circuit and magnetic amplifier are also introduced and used to...
US20120098612 REDUCED COMPLEXITY FDM-CPM DECTECTOR WITH MULTIPLE ACCESS INTERFERENCE CANCELLATION  
An FDM-CPM multi-user detector (30) jointly detects the received symbols for all users by determining from the received multi-user signal an a-posteriori probability mass function (pmf) of a...
US20120306586 CONTROL CIRCUIT AND METHOD FOR A PWM VOLTAGE REGULATOR  
A control circuit and method for a PWM voltage regulator combine a high frequency feedback technique with a constant on-time or constant off-time topology to improve the transient performance of...
US20110006853 MULTI MODE MODULATOR AND METHOD WITH IMPROVED DYNAMIC LOAD REGULATION  
A dual mode modulator is proposed for driving a power output stage having a serial connection of high-side power FET and low-side power FET. The dual mode modulator includes a PWM modulator...
US20130300513 High Efficiency Amplification  
A radio frequency amplification stage comprising: an amplifier for receiving an input signal to be amplified and a power supply voltage; and a power supply voltage stage for supplying said power...
US20090251231 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...
US20110032046 I/Q Impairment Calibration Using A Spectrum Analyzer  
A quadrature modulator (QM) may be calibrated by determining total equivalent offsets in the I- and Q-channels, a total equivalent gain imbalance between the I- and Q-channels, and a total...
US20140320226 SYNTHESIZER FOR TRANSMITTER AND DIGITAL AMPLITUDE MODULATOR  
According to one embodiment, a synthesizer for a transmitter includes a transformer, a plurality of core support units and a fixing member. The plurality of core support units includes a support...
US20110050354 VOLTAGE CONTROL OSCILLATOR AND QUADRATURE MODULATOR  
A voltage control oscillator includes: first and second field effect transistors, a drain of one of which is connected to a gate of the other and a drain of the other of which is connected to a...
US20110183636 RADIO FREQUENCY TRANSMITTER HAVING AN AMPLIFIER WITH POWER SUPPLY MODULATION  
A circuit including a carrier amplifier having an input, an output, a first transistor coupled to a first power supply voltage terminal for receiving a modulated power supply voltage, and a second...
US20140111284 COMPENSATION SCHEMES FOR THE VOLTAGE DROOP OF SOLID-STATE MARX MODULATORS  
A novel design scheme for the compensation circuitry of solid-state Marx modulators has been described for enhancing the compensation ability of the compensation cells of solid-state Marx...
US20140300426 QUADRATURE POWER AMPLIFIER HAVING INCREASED EFFICIENCY  
A method and system for achieving increased efficiency in a quadrature modulated power amplifier (11) are disclosed. In some embodiments, a supply path (36, 40) and a gain path (38, 42) are...
US20130127558 Method for Providing a Modulation Scheme  
A method for providing a first modulation scheme based on a second modulation scheme, the second modulation scheme including a first constellation point associated with a first bit pattern and a...
US20110316640 GATE PULSE MODULATION CIRCUIT AND SLOPING MODULATION METHOD THEREOF  
Exemplary gate pulse modulation circuit and sloping modulation method applied thereto are provided. The gate pulse modulation circuit has an output terminal and includes a voltage modulation...
US20110223871 ADDER, AND POWER COMBINER, QUADRATURE MODULATOR, QUADRATURE DEMODULATOR, POWER AMPLIFIER, TRANSMITTER AND WIRELESS COMMUNICATOR USING SAME  
To provide an adder capable of obtaining an addition signal of a plurality of high frequency signals, and also a power combiner, a quadrature modulator, a quadrature demodulator, a power...
US20120286891 MIXER CELL, MODULATOR AND METHOD  
Embodiments provide a mixer cell, which is implemented to logically combine a data signal with an oscillator signal and a sign signal to obtain a mixer cell output signal based on the logical...
US20110260804 PULSE WIDTH MODULATING CIRCUIT  
A pulse width modulating (PWM) circuit includes an activating module and a pulse generating module connected to the activating module. The activating module includes a current resource and a...
US20080258834 PULSE WIDTH MODULATION CIRCUIT  
A pulse width modulation (PWM) circuit includes a turn on/off switch and a PWM controller. The first terminal of the turn on/off switch is coupled to a turn off voltage. The control terminal of...
US20120032748 Systems and Methods of Ripple Reduction in a DC/DC Converter  
Systems and devices for ripple reduction in a DC/DC converter are presented. The disclosed systems and methods enable ripple reduction in discontinuous conduction mode (DCM) operation. In DCM, the...
US20130285758 SERIAL COMMUNICATION PROTOCOL FOR MEDICAL DEVICE  
An apparatus is disclosed. The apparatus includes a circuit configured to transmit a signal as a serial protocol over a pair of electrical conductors. The serial protocol is defined as a series of...
US20140132236 Slope Compensation Module  
A slope compensation module provides slope compensation of a switched-mode power supply using current mode control. The slope control unit comprises a capacitor coupled between an input and an...
US20110133704 METHOD FOR CONTROLLING AN INTERLEAVING MULTIPHASE REGULATOR AND CORRESPONDING SYSTEM  
A method is provided for controlling turn-on of phases of a multiphase regulator. According to the method, there are tested the conditions necessary for the turn-on of a phase to be turned-on...
US20080099090 Valve, controller, system and method providing closed loop current control of a voice coil using pulse width modulation drive elements  
A linear voice coil actuator is described, specifically applied to a fluid power valve. The valve includes at least one inlet port and at least one outlet port. A spool controls fluid flow between...
US20120200367 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...
US20140035692 OPTIMIZED MULTI-LEVEL FINITE STATE MACHINE WITH REDUNDANT DC NODES  
A method and system for eliminating/suppressing long transition runs over a communications channel is disclosed. The method may include providing modulation coding based on a multi-level finite...
US20090267738 SIGNAL CONVERSION DEVICE, RADIO FREQUENCY IDENTIFICATION (RFID) TAG, AND METHOD FOR OPERATING THE RFID TAG  
A signal conversion device, a radio frequency identification (RFID) tag, and a method for operating the RFID tag. The RFID tag has an electrically erasable programmable read-only memory module for...
US20140300427 LOOKUP TABLE ASSISTED PULSE WIDTH MODULATION  
Embodiments are directed to modulating a pulse width modulation (PWM) signal, by initializing at least one phase index to an initial value, establishing a set of values in a lookup table that...
US20150256159 Load Transient Asynchronous Boost for Pulse Width Modulation Modulator  
A pulse width modulation controller (PWM) is disclosed which has a MOSFET (15) responsive to the error voltage (Verror) signal from the PWM amplifier (17) to detect a transient condition without...
US20120171971 LOW NOISE RF DRIVER  
A low noise RF driver circuit including at least two series-coupled driver stages which receive a frequency modulated signal and an amplitude modulated signal that is applied to the supply voltage...
US20090322438 EXTENDED MULTI-MODULUS PRESCALER  
Embodiments of apparatuses, articles, methods, and systems for a synthesizer with an extended multi-modulus prescaler are generally described herein. Other embodiments may be described and claimed.
US20120161892 Enhanced polar modulator for transmitter  
Enhanced polar modulator for transmitter. Within a phase locked loop (PLL), two point modulation topology is employed in which phase information passes through a limiter (e.g., a ±90° or ±π/2),...
US20120062330 RADIO FREQUENCY INTEGRATED CIRCUIT FOR ENHANCED TRANSMIT/RECEIVE PERFORMANCE IN LOW POWER APPLICATIONS AND METHOD OF MAKING THE SAME  
A radio frequency integrated circuit (and method of making) for enhancing wireless communication and/or sensing systems comprising a base comprising a gallium arsenide (GaAs) substrate; a binary...
US20090309670 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...
US20120319795 METHOD AND DEVICE FOR DETECTING PWM WAVE  
A device for detecting a PWM wave, comprising: a PWM wave generating module, configured to generate the PWM wave; a detecting module coupled to the PWM wave generating module, configured to...
US20130002366 COMPARATOR-LESS PULSE-WIDTH MODULATION  
A pulse width modulation device includes a switching transistor for defining modulation phases, a capacitor, and switches arranged to: a) in a first phase, charge the capacitor to a voltage...
US20150236646 Sine-Cosine Modulator  
The invention relates to a self-oscillating pulse-width modulation amplifier in the form of a sine-cosine modulator (10) comprising at least two comparators (13, 14), two integrators (11, 12), a...
US20080062731 DUTY FEED FORWARD METHOD AND APPARATUS FOR MODULATING A DUTY OF A PMW SIGNAL AND POWER CONVERTING METHOD AND POWER CONVERTER USING THE SAME  
The duty of a PWM signal in a power converter is extracted to feed forward to modulate the slope of a linear oscillating ramp signal or the voltage level of an error signal, so as to modulate the...
US20110204988 GLUE-LOGIC BASED METHOD AND SYSTEM FOR MINIMIZING LOSSES IN OVERSAMPLED DIGITALLY CONTROLLED DC-DC CONVERTERS  
A practical method and system for oversampled digitally controlled DC-DC converters is presented. To minimize the switching losses while maintaining all advantages of the oversampling, “glue...
US20110115460 ELECTRICAL SWITCHING MODULE  
A module including a case; an electrical switching device configured to control power to a load; and a controller coupled to the electrical switching device. The electrical switching device and...
US20130082794 EXTENDING PULSE WIDTH MODULATION PHASE OFFSET  
Extending pulse width modulation phase offset when generating phase shifted groups of pulse width modulation (PWM) signals is accomplished with a separate phase counter that is independent of the...
US20130082795 REPETITIVE SINGLE CYCLE PULSE WIDTH MODULATION GENERATION  
Multiple pulse width modulation (PWM) generators each have a separate phase offset counter creating a phase shift. The phase shifting process is separated from the duty cycle generation process,...
US20140294206 ASYMMETRICALLY-SWITCHED MODULATION SCHEME  
An asymmetric modulation scheme may be used to drive two output nodes coupled to a load. The asymmetric modulation scheme may be one-sided such that the switching rate of a first output node is...
US20080315967 VARIABLE PULSE-WIDTH MODULATION WITH ZERO D.C. AVERAGE IN EACH PERIOD  
Pulse-width modulation (PWM) finds wide use in many applications including motor control, communication systems, music synthesizers, power supplies, class-D and digital amplifiers, among others....
US20140125423 METHOD AND DEVICE FOR DIGITAL MODULATION WITH LOW TRANSITION DENSITY  
The present invention relates to a digital modulation method and a corresponding modulator. The modulator comprises a transcoder (110) followed by a FIFO register (120) and a 2-PSK modulator...
US20150229271 CURRENT DRIVEN FLOATING DRIVER CIRCUIT  
A circuit for generating a modulated signal is disclosed. The circuit includes a constant current source. The circuit further includes a first switch that is coupled to the constant current...
US20060114075 Transmitter and a method of calibrating power in signals output from a transmitter  
A transmitter circuit 10 with a first characteristic controllable by a first control signal and a second characteristic controllable by a second control signal is calibrated using a calibration...
US20100052806 MODULATION FOR AMPLITUDE-MODULATING A SIGNAL  
Modulators for amplitude-modulating signals defined by phase information and envelope codes are provided with first transistors for receiving the phase information and second transistors for...
US20140375393 DIGITAL AMPLITUDE MODULATOR AND CONTROL METHOD FOR DIGITAL AMPLITUDE MODULATOR  
According to one embodiment, a digital amplitude modulator includes a power supply unit, a measurement unit, a calculation unit, and a power controller. The power supply unit supplies a power...
US20130147570 METHODS AND APPARATUS FOR LOAD INTERROGATION USING POWER USAGE MODULATION  
Methods and apparatus provide for: detecting an identification (ID) number associated with a piece of information technology (IT) equipment using a first computer-readable and executable program...
US20080297270 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...

Matches 1 - 50 out of 392 1 2 3 4 5 6 7 8 >