Amplifiers inventions

20090278597 - Slew rate and settling time improvement circuitry and method for 3-stage amplifier: An operational amplifier (1B) amplifies an input signal (Vin) to produce an output signal (Vout), and includes a 3-stage amplifier (1C) including a first amplifier stage (2) receiving the input signal, a second amplifier stage (3) driven by the first amplifier stage (2), and a third amplifier stage (4) driven... Agent: Texas Instruments Incorporated

20090278598 - Method and apparatus for modifying interactions between an electrical generator and a nonlinear load: A method and apparatus for modifying interactions between an electrical generator and a nonlinear load is described. One illustrative embodiment receives a main control signal at a control input of an engine of the electrical generator, the main control signal controlling at least one of output power, output current, and... Agent: Neugeboren O'dowd PC

20090278599 - Progressive power generating amplifiers: A power amplifier circuit includes an unequal power splitter that splits an input signal using an unequal power split and provides a first power level signal and a second power level signal. A first amplifier path includes a first transistor amplifier that amplifies the first power level signal, and a... Agent: Myers Bigel Sibley & Sajovec, P.A.

20090278600 - Electronic circuit and electronic device: An electronic circuit includes: a first amplifying circuit to which a first input signal is inputted; a second amplifying circuit to which a second input signal is inputted; a first drain ground amplifying transistor provided between a first power source node and an output node with control over the gate... Agent: Oliff & Berridge, PLC

20090278601 - Preamplifier and method for calibrating offsets therein: A preamplifier includes cascade-connected amplifying circuits, and at least one of the cascade-connected amplifying circuits includes a differential switch pair circuit, a comparator and energy storing elements. The differential switch pair circuit has a pair of differential inputs and a pair of differential outputs. The comparator -outputs a comparison signal... Agent: Rabin & Berdo, PC

20090278602 - Closed loop surge protection technique for differential amplifiers: A differential amplifier with surge protection is described. The differential amplifier includes a first output driver device, a second output driver device, a first replica device, a second replica device, a current comparator, and a clamp circuit. The first replica device is configured to be a replica of the first... Agent: Fiala & Weaver, P.l.l.c. C/o Cpa Global

20090278603 - All n-type transistor high-side current mirror: The present invention relates to an all n-type transistor current mirror for mirroring an input current to an output current. The current mirror comprises an input n-type transistor (T4, QO, T1) interposed between a positive supply plane (VCC) and an input node (104, 202, 310) with its collector being connected... Agent: Nxp, B.v. Nxp Intellectual Property & Licensing

20090278604 - Operational amplifier and related method of enhancing slew rate: An operational amplifier capable of enhancing slew rate is disclosed. The operational amplifier includes a first current generator for generating a first bias current, a second current generator for generating a second bias current, an amplification stage, coupled to the first current generator, for generating a amplification signal according to... Agent: North America Intellectual Property Corporation

20090278605 - Method for implementation and parameter settings of a voltage enhancement circuit for amplifiers as an integrated circuit (ic): Voltage Enhancement Circuitry (VEC) for amplifiers, suitable of being implemented as an Integrated Circuit (IC), that comprises a VEC driver with a low output resistance (Rdson) while being in its inactive mode and a linearly increasing resistance that is changing linearly with the input control signal, while entering into its... Agent: Marsteller & Associates

20090278606 - Agc for slicer-based low power demodulator: An apparatus and method for performing automatic gain control in a receiver are disclosed. The apparatus may include an amplifier, and the gain control may be based on an output from the amplifier during a time period in which a target signal is not present at the output of the... Agent: Qualcomm Incorporated

20090278607 - Power supply device for driving an amplifier: A power supply device for driving first and second amplifiers includes a first power generator, a second power generator, a charge pump and a control unit. The first power generator provides a first voltage for first power reception ends of the first and second amplifiers. The second power generator provides... Agent: North America Intellectual Property Corporation

20090278608 - Power supply device for driving an amplifier: A power supply device for driving an amplifier includes a power generator for providing a first voltage for a first power reception end of the amplifier, a power conversion unit coupled to the power generator, for converting the first voltage into a second voltage, a charge pump coupled between the... Agent: North America Intellectual Property Corporation

20090278609 - Supply control for multiple power modes of a power amplifier: In one embodiment, the present invention includes an apparatus having at least two gain stages to receive incoming signals and to output amplified signals, along with multiple regulators. More specifically, a linear regulator can be coupled to the first gain stage to provide a first regulated voltage to the first... Agent: Trop, Pruner & Hu, P.C.

20090278610 - Power amplifier output voltage reduction method: An apparatus and method are provided for reducing the output voltage in a power amplifier. The power amplifier contains a power supply, an amplifier stage, an impedance matching circuit, and a voltage reduction unit connected between the power supply and the amplifier stage. A power amplifier device within the amplifier... Agent: Motorola, Inc.

20090273395 - Preamplifier and method for calibrating offset voltages therein: A preamplifier includes cascade-connected amplifying circuits, and at least one of the cascade-connected amplifying circuits includes a differential switch pair circuit, a comparator and current sources. The differential switch pair circuit has a pair of differential inputs and a pair of differential outputs. The comparator outputs a comparison signal by... Agent: Hayes Soloway P.C.

20090273396 - Pulse area modulation and high-efficiency linear power amplifier system using the same: A linear power amplifier system using pulse area modulation includes: an envelop/phase decomposer for decomposing an input signal into an envelop signal and a phase signal; a pulse area modulator for modulating the envelop signal such that an area of the modulated envelop signal is proportional to an amplitude of... Agent: Husch Blackwell Sanders LLP

20090273397 - Controlling power with an output network: In one embodiment, the present invention includes multiple gain stages and an output network coupled to the gain stages. Each of the gain stages can be independently controlled to amplify a radio frequency (RF) signal to an output power level for transmission from a mobile wireless device. When controlled to... Agent: Trop, Pruner & Hu, P.C.

20090273398 - Doherty power amplifier: The present invention relates to a power amplifier; and, more particularly, to a Doherty power amplifier. The power amplifier includes at least one carrier amplifier; at least one peaking amplifier arranged in parallel with the carrier amplifier in such a manner that the carrier amplifier and the peaking amplifier collectively... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090273400 - Device and method for generating an output signal: An embodiment provides a device for generating an output signal as a function of an input signal, wherein a plurality of circuit sections generate partial signals and the output signal is composed from the partial signals.... Agent: Eschweiler & Associates LLC

20090273399 - Power amplifier, power amplifier circuit and power amplifying method: The present invention discloses a power amplifier, comprising: a first transistor having a gate receiving an input signal; a second transistor coupled to the first transistor in a cascode configuration, in which a source of the second transistor is coupled to a drain of the first transistor, and a drain... Agent: Tung & Associates / Randy W. Tung, Esq.

20090273401 - Method and system for multiple tuner application using a low noise broadband distribution amplifier: An active splitter circuit arrangement includes a first amplification module having a number of first input ports and first output ports. The first amplification module is configured to provide first stage amplification to a received input signal and produce from the amplified input signal a number of output signals, each... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20090267687 - Chopper-stabilized amplifier and magnetic field sensor: A chopper-stabilized amplifier has switching networks arranged to support a high frequency clocking signal and to provide a high common mode rejection and a high rejection of an offset component of an input signal. A magnetic field sensor includes a Hall effect element coupled to a modulation circuit. The modulation... Agent: Daly, Crowley, Mofford & Durkee, LLP

20090267688 - Combined feedback and feed-forward linearization of rf power amplifiers: A power amplifier module and corresponding system are disclosed for linearizing the output from a power amplifier. Both a feedback system, containing a compensator and the power amplifier in a feedback loop, and a pre-distortion compensation system injecting pre-distortion signals into or before the feedback system are used to compensate... Agent: Motorola, Inc.

20090267689 - High efficiency amplifier with reduced parasitic capacitance: A semiconductor amplifier is provided comprising, a substrate and one or more unit amplifying cells (UACs) formed on the substrate, wherein each UAC is laterally surrounded by a first lateral dielectric filled trench (DFT) isolation wall extending at least to the substrate and multiple UACs are surrounded by a second... Agent: Ingrassia Fisher & Lorenz, P.C. (fs)

20090267690 - Signal modulation device and signal amplifier cooperative therewith: A signal modulation device and a signal amplifier cooperative therewith. The signal modulation device includes a local oscillation signal source, a baseband signal source, a first NMOS transistor, and a second NMOS transistor, wherein the first and second NMOS transistors are coupled with the baseband signal source and form a... Agent: Edwards Angell Palmer & Dodge LLP

20090267691 - Amplifier circuit: A differential amplifier circuit 110 composed of an inverter is connected to the power supply voltage VCC and the ground voltage GND through a NMOS transistor 142 and a PMOS transistor 144 respectively. The NMOS transistor 142 is connected to the control signal terminal PS, and the PMOS transistor 144... Agent: Young & Thompson

20090267692 - Digitally variable gain amplifier using multiplexed gain blocks: A digitally variable gain amplifier comprising a front-end stage, a level shifter stage, and an output amplifier stage. The front-end stage comprises a high gain pre-amplifier and a low gain pre-amplifier driven in parallel by a differential input signal. A coarse gain control is realized by enabling only one pre-amplifiers... Agent: Merchant & Gould PC

20090267693 - Resistor self-trim circuit for increased performance: In a method and apparatus for trimming values of load resistors to reduce variations there between, a common mode feedback loop (CMFBL) included in a differential amplifier is switched from operating in a closed loop mode to operate in an open loop mode. The CMFBL includes an operational amplifier (OA)... Agent: Texas Instruments Incorporated

20090267694 - Apparatus for receiving input and bias signals at common node: An apparatus includes an input-bias node and an internal load. The input-bias node is configured to simultaneously receive an input signal and a bias signal through an input-bias port. The internal load is connected between the input-bias node and multiple output ports, at least one of the output ports outputting... Agent: Kathy Manke Avago Technologies Limited

20090267695 - Class ab output stage with programmable bias point control: A class AB output stage includes a driver to generate a first drive signal and a second drive signal, and two bias voltage sources to provide two bias voltages to level shift the first and second drive signals, in order to drive a pair of high side and low side... Agent: Rosenberg, Klein & Lee

20090267696 - High slew rate amplifier, analog-to-digital converter using same, cmos imager using the analog-to-digital converter and related methods: An amplifier, which may be used in a pipelined analog-to-digital converter, includes a first amplifier stage driving a second amplifier stage. At least one compensation capacitor is coupled to provide negative feedback through the capacitor from the second amplifier stage to the first amplifier stage. The slew rate of the... Agent: Dorsey & Whitney LLP Intellectual Property Department

20090261899 - Amplifier with automatic gain profile control and calibration: Embodiments of the present invention provide systems and methods for automatic amplifier gain profile control, including a method for automatically configuring a variable gain profile amplifier according to received input and a variable gain profile amplification system. Further, embodiments of the present invention provide systems and methods for increased gain... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20090261900 - Apparatus for coupling at least one of a plurality of amplified input signals to an output terminal using a directional coupler: An apparatus has an input terminal configured to receive an input signal, a network coupled to the input terminal and configured to provide a plurality of amplified input signals, and a directional coupler coupled to the network and configured to couple at least one of the plurality of amplified input... Agent: Slater & Matsil LLP

20090261901 - Decade bandwidth planar mmic four port transformer: A wide bandwidth planar four port MMIC transformer is provided by input diplexers which divide up the incoming signal into a high band and a low band, with the resulting signals coupled to high band and low band four port transformers implemented in one embodiment using spiral inductors and coupled... Agent: Bae Systems

20090261902 - Asynchronous error correction circuit for switching amplifier: A circuit (104, 106) includes a comparison circuit (202, 504, 506, 602) and a correction circuit (204, 508, 510, 604). The comparison circuit provides a comparison signal (212, 524, 526, 612) in response to an error value (210, 520, 522, 610) and a reference value (214). The error value is... Agent: Vedder Price/freescale

20090261903 - Variable gain rf amplifier: A variable gain amplifier having an input node, a variable current source including a control input coupled to the input node, first and second branches coupled in parallel between a first supply terminal and the variable current source, the first and second branches defining a differential pair arranged to be... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, P.C.

20090261904 - Multi-input operational amplifier and method for reducing input offset thereof: A multi-input operational amplifier comprises two transconductors, two current mirrors, and a current source. Each transconductor generates a current according to a corresponding voltage difference. When the voltage difference is less than or equal to zero, the current is a constant. When the voltage difference exceeds zero, the current is... Agent: Wpat, PC Intellectual Property Attorneys

20090261905 - Open gain adjustment circuit for operational amplifier: An operational amplifier comprises: a differential amplifier circuit (11) that performs a differential amplification operation based on the difference of signals received at two input terminals (IN1, IN2); and a source-grounded amplifier (M5) connected to an output of the differential amplifier circuit (11). In the operational amplifier, there are provided... Agent: Connolly Bove Lodge & Hutz LLP

20090261906 - Amplifier for improving electrostatic discharge characteristic: An amplifier for improving an electrostatic discharge (ESD) characteristic includes an operational amplifier, a first resistor circuit, a first fuse box, a second resistor circuit, and a second fuse box. The operational amplifier includes a first input terminal receiving a first input signal, a second input terminal receiving a second... Agent: Mills & Onello LLP

20090261907 - Integrated circuit having on die structure providing capacitance in amplifier feedback path: An amplifier structure includes shield conductors that are provided spatially adjacent to elongated feedback signal lines that couple a feedback circuit to an amplifier input. The shield conductors are provided between the feedback signal lines and a ground plane, which interrupts a parasitic capacitance that otherwise would be established between... Agent: Kenyon & Kenyon LLP

20090261908 - Power supply providing ultrafast modulation of output voltage: A power supply for providing a modulated output voltage to a load is disclosed. According to various embodiments, the power supply comprises a plurality of parallel-connected switch-mode power modules and a controller. The controller is connected to each of the power modules and is for controlling the duty cycles of... Agent: K&l Gates LLP