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| Number | Title | Issue Date |
| 7952429 | Multiple-input and multiple-output amplifier having pseudo-differential inputs The invention relates to an amplifier capable of delivering a plurality of output signals, these output signals being controlled by a plurality of input signals. A multiple-input and multiple-output amplifier of the invention comprises a common input terminal, 4 sig... | 05/31/2011 |
| 7940119 | Multiple-input and multiple-output amplifier using mutual induction in the feedback network The invention relates to an amplifier capable of producing a plurality of output signals, these output signals being controlled by a plurality of input signals. A multiple-input and multiple-output amplifier of the invention includes 4 signal input terminals, 4 sign... | 05/10/2011 |
| 7567122 | Variable gain amplifiers systems and methods A system for controlling gain in a polar loop is disclosed. Embodiments of the invention provide for a substantially constant gain tolerant of changes in supply voltage, ambient temperature, and/or manufacturing process. ... | 07/28/2009 |
| 7391259 | Power amplifier Embodiments of the present invention comprise methods and devices for amplifying a signal by amplifying a first signal and by then amplifying a second signal only if the first signal exceeds a predetermined threshold. The first and second amplified signals are then ... | 06/24/2008 |
| 7375584 | Gain adjustment method, gain adjustment circuit, and optical disc device having same gain adjustment circuit A gain adjustment circuit includes a gain varying device for varying the gain of an input signal; and a detection device for detecting a variable output signal of the gain varying device, wherein the detection output signal of the detection device is fed back to the... | 05/20/2008 |
| 7327190 | Differential amplifier arrangement Circuitry for use in a differential amplifier includes an input stage having a first differential amplifier and an offset compensation stage that includes at least one controllable current source. The offset compensation stage is connected to a bias input of the fir... | 02/05/2008 |
| 7323934 | Operational transconductance amplifier An operational transconductance amplifier (OTA) includes a first, a second and a third differential units, a voltage-to-current converting unit and a current subtraction device. The first and the second differential units receive a differential input voltage and the... | 01/29/2008 |
| 7302246 | Programmable gain amplifier with self-adjusting offset correction Briefly, in accordance with one embodiment of the invention, a calibration circuit may detect a difference between first and second outputs of a differential output programmable gain amplifier to determine a dc offset at the differential output. In the event an offs... | 11/27/2007 |
| 7295066 | 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 received by a signal processing system which includes a predistortion subsys... | 11/13/2007 |
| 7276971 | Multi-operational amplifier system A multi-operational amplifier system comprises a plurality of operational amplifiers and a controller to configure the plurality of operational amplifiers. The operational amplifiers may be selectively configured to operate individually or in combination with other ... | 10/02/2007 |
| 7256649 | Multiple signal intermodulation reduction system An intermodulation product reduction or cancellation amplifier received two input signals that are split in quadrature wherein the inphase outputs are summed and then amplified as an inphase signal, and the quadrature outputs are fixed-phase phase-shifted, then summ... | 08/14/2007 |
| 7253680 | Amplifier system with current-mode servo feedback A system and method for compensating an amplifier apparatus for low frequency and/or DC components of an externally applied input signal as well as for any voltage offsets contributed by the amplifier circuitry. Band-limited servo feedback is applied to predetermine... | 08/07/2007 |
| 7245186 | Bandpass amplifier The present invention discloses a bandpass amplifier having gain and bandpass performance. The bandpass amplifier includes an input match unit for matching the gain of the amplifier and having a first filter response; a first bias unit electrically connected to the ... | 07/17/2007 |
| 7236054 | Multi-operational amplifier system A multi-operational amplifier system comprises a plurality of operational amplifiers and a controller to configure the plurality of operational amplifiers. The operational amplifiers may be selectively configured to operate individually or in combination with other ... | 06/26/2007 |
| 7230483 | Negative feedback system with an error compensation scheme A negative feedback system includes a first summation module for receiving a system input and outputting a first summation output. A first forward module is coupled to the first summation module for receiving the first summation output and outputting a first forward... | 06/12/2007 |
| 7230989 | System and method for processing digital visual interface communication data signals and display data channel communication signals over a transmission line A digital communication system for transmitting and receiving Digital Visual Interface (DVI) communication data signals and Display Data Channel (DDC) communication signals over a transmission line comprises an open-loop equalizer circuit and a DDC extension circuit... | 06/12/2007 |
| 7209007 | Combined analog signal gain controller and equalizer An analog signal gain controller and equalizer with an increased signal bandwidth for reducing intersymbol interference (ISI) within a digital data signal. ... | 04/24/2007 |
| 7209001 | Offset compensation circuit for a monitoring photodiode Disclosed is a circuit for compensating for an offset voltage of a monitoring photodiode. After the offset voltage is measured in a photodiode test, current source and offset resistors are added according to the measured resistances, thereby compensating for the off... | 04/24/2007 |
| 7180372 | High frequency amplifier An amplifier for amplifying an input signal in a frequency band, has a quadrature signal divider for dividing the input signal into first and second components. The first component is amplified in a first transistor amplifier having a first frequency response to pro... | 02/20/2007 |
| 7164738 | Signal canceling method and device In a signal cancellation method and device which can cancel input signals quickly and reliably (stably), an input signal is split into a first and second signal. The second signal is split into mutually orthogonal first and second subsignals which are recombined aft... | 01/16/2007 |
| 7161420 | Amplifiers with compensation An amplifier circuit comprises a first operational transconductance (OTA) having an input and an output and a second OTA having an input that communicates with an output of the first OTA. A third OTA has an input that communicates with an input of the first OTA. A f... | 01/09/2007 |
| 7157976 | High frequency amplifier A high frequency amplifier comprising a first trans-impedance amplifier, a second trans-impedance amplifier, a third amplifier, and a variant current source is provided. The first trans-impedance amplifier receives an input current and outputs a first output voltage... | 01/02/2007 |
| 7132885 | Low phase shift implementation of the baseband circuitry of a Cartesian feedback loop A circuit is provided that includes a Cartesian feedback loop. The Cartesian feedback loop includes one or more operational amplifiers. At least one of the operational amplifiers includes two or more cascaded amplifier stages and one or more bypass amplifier stages.... | 11/07/2006 |
| 7126417 | Distributed gain network A system and method for a distribution network is provided wherein cascaded power amplifiers with bypass switching are disposed along the branches of the network. The amplifiers may have an RF modem and a programmable digital computer that enables communication with... | 10/24/2006 |
| 7126414 | Arrangement and method for controlling an amplifier circuit corresponding to energy uptake in the amplifier circuit An amplifier circuit (1) is disclosed, wherein with a view to reducing the leakage power of the amplifier circuit (1) a current path (6) is provided between a first output terminal (A1) and a second output terminal (A2) of the ampl... | 10/24/2006 |
| 7113744 | Adaptive radio transceiver with a power amplifier 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 ... | 09/26/2006 |
| 7109794 | Differential gain stage for low voltage supply A new method and a circuit to improve the low voltage performance of a differential gain stage is achieved. The method comprises a monitoring stage and a differential stage. The monitoring stage comprises a differential transistor pair having first and second differ... | 09/19/2006 |
| 7088975 | Automatic gain control system and method using multiple local AGC loops A receiver comprises a first Variable Gain Amplifier (VGA) that amplifies an input signal in accordance with a first gain to produce a first amplified signal. The first gain is controlled based on the first amplified signal. The receiver includes a second VGA that p... | 08/08/2006 |
| 7078965 | Servo balancing among driver devices A method and apparatus for reducing imbalances among the outputs of a plurality of driver devices connected in a parallel configuration to drive a common load. One driver is designated as the master, and suitable servo circuitry is provided to each of the other slav... | 07/18/2006 |
| 7068107 | Variable gain amplifier The variable gain amplifier of the present invention includes at least an operation amplifier. By choosing one of output stages, a feedback resistor is selected and the gain of the variable gain amplifier is decided according to the resistance of the selected feedba... | 06/27/2006 |
| 7068101 | 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 received by a predistortion subsystem which applies deliberate predistortion... | 06/27/2006 |
| 7068099 | Power amplifier module with distortion compensation The invention relates to a power amplifier module comprising a first amplifier 2 having a first front-end 4 and a first backend amplifier stage 5 and a second amplifier 3 having a second front-end 6 and a second backend amplifier s... | 06/27/2006 |
| 7053706 | High linearity doherty communication amplifier with bias control The present invention relates to bias control of a power amplification circuit of a mobile device for improving the efficiency and the linearity properties of the power amplifier. In one embodiment, the power amplifier improves these properties by receiving a voltag... | 05/30/2006 |
| 7042283 | High-efficiency linear power amplifier A transmission signal and a pilot signal are predistorted by a digital predistorter 13 by use of a power-series model, and the predistorted output is converted by a digital-analog converter 14 to an analog signal. The analog signal is up converted by a... | 05/09/2006 |
| 7038539 | RF amplifier employing active load linearization A method and apparatus for linear amplification of a modulated carrier signal or multi-carrier signal is disclosed. The linearity of the amplifier is improved by employing dynamic load line adjustments. A second current source coupled to the amplifier output load is... | 05/02/2006 |
| 7026871 | 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 received by a signal processing system which includes a predistortion subsys... | 04/11/2006 |
| 7023273 | Architecture and implementation methods of digital predistortion circuitry A predistorter including a modulator configured for use with an RF power amplifier or in an amplifier system that combines in a data structure correction factors for amplitude and phase non-linearities in the responses of the amplifier and the modulator. Correction ... | 04/04/2006 |
| 7010025 | Circuit and method for an improved front end in duplex signal communication systems An improved analog front end and methods for increasing the power efficiency of duplex signals on a transmission line are disclosed. The improved analog front end bifurcates a hybrid into a fixed portion and an adaptive portion. The adaptive portion combines a biqua... | 03/07/2006 |
| 7002410 | Adaptive linearization technique for communication building block The present invention is directed to a linearization apparatus and method. Preferred embodiments according to the present invention can combine an auxiliary non-linear block to a functional block of a system to increase linearity of an output signal of the system su... | 02/21/2006 |
| 6975167 | 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 prior to being received by the predistortion subsystem. The delayed input... | 12/13/2005 |
