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9041467 Power amplifier with feedback impedance for stable output  
An amplifier circuit amplifies a signal for wireless transmission. A feedback circuit, including a capacitor, is coupled to the amplifier circuit. Components of the feedback circuit are selected...
8963636 Outphasing power amplifier linearization method with improved output power back-off efficiency  
A high efficiency outphasing power amplifier is disclosed which provides a high-efficiency, high-linearity outphasing amplifier capable of amplifying complex, wideband, multi-tone signals. Systems...
8957734 Amplifier calibration  
A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path. A first state of the amplifier is identified defining a...
8847678 Frequency compensation circuit for voltage regulator  
A frequency compensation circuit for a voltage regulator is provided in embodiments of the present invention. The frequency compensation circuit mainly includes a first transconductance...
8837633 Systems and methods for digital processing based on active signal channels of a communication system  
A communication system includes digital signals that carry data and correspond to channels of a composite signal to be transmitted across a communication channel. Active channels are detected and...
8816767 Amplifier calibration  
A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path. A first state of the amplifier is identified defining a...
8803607 Power amplifier  
There is provided a power amplifier capable of increasing linear output power and efficiency without sacrificing an overall gain by employing a vector modulation function in a driving stage, with...
8766717 Systems and methods of RF power transmission, modulation, and amplification, including varying weights of control signals  
Embodiments of the present invention include a method and system for control of a multiple-input-single output (MISO) device. For example, the method includes determining a change in power output...
8766718 Systems and methods for adaptive power amplifier linearization  
An exemplary system comprises a linearizer, a power amplifier, and a feedback block. The linearizer may be configured to use a predistortion control signal to add predistortion to a receive signal...
8737520 RF directional coupled output from a quadrature combined amplifier  
A radio frequency (RF) coupling circuit for coupling an RF output of a quadrature combined amplifier. According to an embodiment, the RF coupling circuit includes a phase shifting component and a...
8729739 Bi-directional circuit breaker  
A circuit breaker comprising first and second JFETs, each comprising a gate, drain and source connection, the JFETs sources being operatively connected to each other to form a common-source...
8686791 Amplifying apparatus and distortion compensation method  
An amplifying apparatus includes: a plurality of amplifiers; a linear combiner receiving a plurality of leakage signals resulting from cross leakage between outputs of the plurality of amplifiers...
8659357 Conditionally-stable operational amplifier with tunable wideband buffers  
A method for processing signals may include, in a conditionally-stable operational amplifier, shifting the gain curve of the conditionally-stable operational amplifier to a desired position, by...
8660502 High frequency antenna switch module  
In a high frequency antenna switch module, an I/O interface generates various control signals for controlling a switch module on the basis of a system data signal and a system clock, a decoder...
8653890 Amplifier calibration  
A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path. An attenuation of the first amplification path is set...
8653888 High-frequency signal amplifier  
A high-frequency signal amplifier includes an amplifier having an input terminal and an output terminal, and amplifying a high-frequency signal; a signal line connected between the output terminal...
8620233 Method of power amplifier predistortion adaptation using compression detection  
A method of power amplifier predistortion that makes use of a compression detector circuit in a feedback loop in order to adapt the channel gain for changing transmitter behavior. By monitoring...
8508217 Output circuit of charge mode sensor  
An output circuit of a charge mode sensor includes a second resistor and an operational amplifier. The second resistor connects an output portion of the charge mode sensor and a ground. The...
8508294 Power amplifier with feedback impedance for stable output  
In one embodiment, an apparatus includes an amplifier circuit having a phase shift. The amplifier circuit amplifies a signal for wireless transmission. A feedback circuit is coupled to the...
8503552 Method and digital communication device for receiving data using QAM symbols  
A digital communication system which applies channel coding and QAM modulation, where in QAM, at the transmitter, a number Q of bits is mapped to one QAM symbol, which is transmitted over the...
8487699 Inductive-element feedback-loop compensator  
Described is an inductive compensating network coupled between the differential inputs of an operational amplifier circuit. The inductive compensating network includes at least one inductive...
8436624 Signal acquisition system having reduced probe loading of a device under test  
A signal acquisition system has a signal acquisition probe having probe tip circuitry coupled to a resistive center conductor signal cable. The resistive center conductor signal cable of the...
8416018 Variable frequency amplifier  
A variable frequency amplifier includes a main amplifier system 4 for amplifying one of signals into which an input signal is split by a directional coupler 3 to output the amplified signal, and...
8410846 Variable gain amplifier  
A variable gain amplifier includes an integrator having an input, an output and a feedback loop connected between the input and output, a plurality of input chains connected in parallel between...
8410849 Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments  
Embodiments of the present invention enable a blended control approach to generate a desired output waveform in an outphasing-based system. Embodiments of blended control according to the present...
8299851 High efficiency linear amplifier  
A high efficiency linear amplifier is disclosed. The amplifier comprises an input module having an input coupled to receive an input signal, a first output configured to provide a first signal...
8248160 Adaptive predistortion for a transmit system  
Systems, methods, and devices relating to the provision of deliberate predistortion to an input signal to compensate for distortions introduced by an amplifier subsystem. An input signal is...
8232841 Amplifier with output filtering  
An amplifier circuit includes an amplifier including an inverting input that communicates with an input signal, a non-inverting input, and an output. A first feedback path communicates with the...
8193856 Amplifier and switched capacitor amplifier circuit  
An amplifier (V) for an integrated circuit amplifier circuit (IC) having a switched capacitor circuit (Cs, Cf) includes a capacitor for frequency compensation (CC1) that is connected in parallel...
8159293 Nested transimpendance amplifier  
A nested transimpedance amplifier circuit including a first power source, a second power source, a charge pump module and a transimpedance amplifier. The first power source is at a first voltage....
8120422 Ripple reduction loop for chopper amplifiers and chopper-stabilized amplifiers  
Ripple reduction loop for chopper amplifiers and chopper-stabilized amplifiers. The ripple reduction loop includes a first chopper, a first amplifier having an input coupled to an output of the...
8058928 Operational amplifier for an active pixel sensor  
The present invention includes operational amplifier for an active pixel sensor that detects optical energy and generates an analog output that is proportional to the optical energy. The active...
8049557 Self oscillating class D amplification device  
An amplification device, comprising a device input receiving a device input signal, an amplifier unit comprising a zero crossing detector unit, an output filter and a lead-lag compensation...
7948309 DC-offset cancelled programmable gain array for low-voltage wireless LAN system and method using the same  
An amplifier circuit includes a transconductance amplifier at an input side of the amplifier circuit, a transimpedance amplifier connected to an output of the transconductance amplifier, and a...
7928800 Programmable compensation network for operational amplifiers  
Systems and methods for implementing a programmable network for a multimode conditionally stable operational amplifier are disclosed.
7911272 Systems and methods of RF power transmission, modulation, and amplification, including blended control embodiments  
Embodiments of the present invention enable a blended control approach to generate a desired output waveform in an outphasing-based system. Embodiments of blended control according to the present...
7888910 Sequencing switched single capacitor for automatic equalization of batteries connected in series  
Techniques for sequencing switched single capacitor for automatic equalization of batteries connected in series are described herein. In one embodiment, a battery equalizer includes a single...
7880543 Data transmitting circuit and transmitting method  
A data transmitting circuit includes a reflection suppressive component generating circuit for generating a reflection suppressive component for suppressing the reflection caused by the...
7872524 Amplification circuit, amplification circuit noise reducing method and program thereof  
[Problems] to provide a CMOS low-noise amplification circuit which can reduce a chip area and design time, and which is easy to be digital-controlled from outside. [Means For Solving the Problems]...
7826801 Adaptive forward error corrector and method thereof, and TDD radio repeating apparatus using the same  
An adaptive feedback estimation and cancellation (AFEC) apparatus includes: a controller for generating and outputting control information by using a synchronization signal from an external...
7812670 Baseband predistortion device and method  
The present invention discloses a baseband predistorter and baseband predistortion method. The baseband predistorter comprising: an address generator for calculating an address of a phase basic...
7812669 Predistortion apparatus, system, and method  
The present invention discloses a predistortion apparatus, a predistortion system and a predistortion method. The predistorter comprises a modular value calculating section, for performing modular...
7808311 Nested transimpedance amplifier  
A nested transimpedance amplifier circuit includes a first-order nested transimpedance amplifier having an input and an output. The first-order nested transimpedance amplifier is configured to be...
7738616 Phase tracking system  
A phase tracking system includes a source of an input signal representing a received symbol. A phase rotator has a first input terminal which is responsive to the input signal, a second input...
7737778 Adaptive predistortion for a transmit system  
Systems, methods, and devices relating to the provision of deliberate predistortion to an input signal to compensate for distortions introduced by an amplifier subsystem. An input signal is...
7719355 Method and apparatus for providing a Cartesian training waveform  
One provides (401, 402) both an in-phase signal component (501) and a quadrature signal component (601) wherein the latter has a non-zero portion. These two signal components are then combined...
7626453 Nested transimpedance amplifier  
A nested transimpedance amplifier (TIA) circuit comprises a zero-order TIA having an input and an output. A first operational amplifier (opamp) has an output and an input that communicates with...
7489188 Input matching apparatus and method for power amplifier using delta-sigma modulated signal  
An apparatus and method amplifies a delta-sigma modulated signal and delivers the amplified signal to a power amplifier without distortion in a communication system. The apparatus receives a...
7456688 Signal extraction circuit and distortion-compensated amplifier incorporating the same  
To cancel a reflected wave reflected from a connecting portion (22) and leaking into a feedback signal when a non-matched component is connected, the reflected wave is extracted by a circulator...
7423484 Adaptive predistortion for a transmit system with gain, phase and delay adjustments  
Systems and methods relating to the provision of gain, phase and delay adjustments to signals to be used by a predistortion subsystem. A portion of an input signal is delayed by delay elements...