Amplifiers inventions

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

20090256630 - 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 the compression behavior of the amplifier, the signal is scaled to compensate for gain and compression point variations in... Agent: Docket Clerk

20090256632 - Method and apparatus for reducing frequency memory effects in rf power amplifiers: The present invention relates to a predistorter for reducing memory effects in RF power amplifiers. The invention also relates to a method for reducing memory effects in RF power amplifiers and to a base station including such a predistorter. A predistorter according to the invention includes first means (1) for... Agent: Rothwell, Figg, Ernst & Manbeck, P.C.

20090256631 - Providing pre-distortion to an input signal: In one implementation, the present invention includes a diode device to receive an incoming radio frequency (RF) signal to be amplified in a gain device of an amplifier and to provide a pre-distorted signal. Based on this pre-distorted signal, the gain device can output an amplified RF signal having substantial... Agent: Trop, Pruner & Hu, P.C.

20090256633 - Bypass device for microwave amplifier unit: The invention relates to a bypass device for a microwave amplifier unit, the microwave amplifier unit (1) comprising at least one low noise amplifier (LNA) and amplifying communication signals in at least one microwave frequency band above 500 MHz, the bypass device extending in parallel to said microwave amplifier unit... Agent: Myers Andras Sherman LLP

20090256634 - Output distortion cancellation circuit: An output distortion circuit includes a first transistor arrangement receiving a nonlinear current associated with a nonlinear differential error signal. The first transistor arrangement produces a reflected base current that is applied to one side of a differential input pair. A second transistor arrangement eliminates the nonlinear differential error signal... Agent: Kenyon & Kenyon LLP

20090256636 - Amplifier arrangement and method for signal amplification: An amplifier arrangement comprises a signal input (Iin+, Iin−) to receive a signal to be amplified, a signal output (Out) to provide an amplified signal, an amplifier stage (AS) coupled between the signal input (Iin+, Iin−) and the signal output (Out), a switchable dynamic biasing stage (DB) with an input... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090256635 - Linear-in-db variable gain amplifier: A variable gain amplifier (VGA) with a gain thereof exponential to a control voltage thereof. The variable gain amplifier (VGA) comprises an exponential DC converter, and a linear voltage multiplier. The exponential DC converter receives the control voltage and generates an exponential voltage which is exponential to the control voltage.... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090256637 - High-frequency power amplifier and communication device: It is an object of the present invention to provide a high-frequency power amplifier capable of improving the linearity at the time of high output by preventing decrease in power of bias supply transistor. The high-frequency power amplifier is a high-frequency power amplifier including high-frequency power amplifier transistors and connected... Agent: Greenblum & Bernstein, P.L.C

20090251209 - High frequency power amplifier: A high frequency power amplifier comprises: an amplifier that amplifies signals received from a first input terminal and outputs amplified signals to an output terminal; a bypass route that connects a second input terminal to the output terminal without passing through the amplifier; a capacitor having a first end connected... Agent: Leydig Voit & Mayer, Ltd

20090251210 - Method and system for gain control and power saving in broadband feedback low-noise amplifiers: Methods and systems for gain control and power saving in broadband feedback low-noise amplifiers are disclosed and may include selectively enabling one or more of a subset and all of plurality of gain stages in the low noise amplifier. A feedback resistance coupled across the plurality of gain stages may... Agent: Mcandrews Held & Malloy, Ltd

20090251211 - Feedforward linearization of rf power amplifiers: RF amplifier system (200) incorporating feedforward linearization. The system includes a digital waveform source (202) generating digital data s(t) representative of at least one analog signal. The system also includes a feedforward linearization circuit for reducing a distortion of an RF power amplifier (212). The feedforward linearization circuit includes a... Agent: Harris Corporation C/o Darby & Darby PC

20090251212 - Switching amplifier: An amplifier having at least one switch controlled by an output voltage of a hysteresis block, wherein the hysteresis block is adapted to receive an input voltage signal based on an integration of an error signal, a low threshold voltage and a high threshold voltage, and is arranged to change... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, P.C.

20090251213 - Method for adjusting threshold voltage and circuit therefor: A method and circuit for changing a threshold voltage of a transistor. The circuit includes a sense circuit coupled to a switching transistor, a circuit transistor and to one terminal of a resistor. The other terminal of the resistor is connected to a body contact. The switching transistor directs current... Agent: Semiconductor Components Industries, LLC Intellectual Property Dept. - A700

20090251214 - Rail-to-rail operational amplifier: A rail-to-rail operational amplifier has a pair of input terminals and an output terminal, and includes first and second parallel-connected differential input stages configured to generate a differential output signal OUTN, OUTP in response to a differential input signal VINN, VINP received at the pair of input terminals. Each of... Agent: Townsend And Townsend And Crew, LLP

20090251215 - Amplifier output stage with extended operating range and reduced quiescent current: An output stage of an amplifier circuit includes one or more output transistors that are selectively driven by a boosted drive circuit, where the boosted drive circuit is arranged such that the output range of the amplifier circuit is increased while maintaining reduced quiescent current. The drive signal to each... Agent: Merchant & Gould PC

20090251216 - Common mode control circuitry for multi-stage operational amplifiers: This disclosure relates to a common mode regulation in multi stage differential amplifiers.... Agent: Spryip, LLC Ifx

20090251217 - Amplifier design with biasing and power control aspects: Techniques for biasing an amplifier using a replica circuit are disclosed. In an embodiment, a replica circuit having substantially the same topology and sizing as a push-pull amplifier circuit is coupled to a main push-pull amplifier circuit. A transistor in the replica circuit may be biased using feedback to generate... Agent: Qualcomm Incorporated

20090251218 - Variable gain amplifier: A variable gain amplifier for amplifying an amplifier input signal includes a current steering transconductance stage and an impedance transformation network configured to match the current steering transconductance stage to the amplifier output. The impedance transformation network includes a tapped inductor, wherein a first inductive portion of the tapped inductor... Agent: Slater & Matsil LLP

20090251219 - Amplifier arrangement and signal generation method: An amplifier arrangement includes an output amplifier stage (OA) comprising a stage input (SIN), a stage output (SOUT) which is coupled to a signal output (OUT) of the amplifier arrangement, and a capacitive element (CE) which couples the stage output (SOUT) to the stage input (SIN). A driver stage (DR)... Agent: Cohen, Pontani, Lieberman & Pavane LLP

20090251220 - Radio-frequency power amplifier: A bias circuit operable to supply a bias current to a first transistor includes: a second transistor having a collector terminal connected to a first power supply; a first resistance element having one end connected to an emitter terminal of the second transistor and having the other end connected to... Agent: Mcdermott Will & Emery LLP

20090251222 - Linear high powered integrated circuit amplifier: A linear high powered integrated circuit amplifier includes a plurality of power amplifiers, balanced integrated circuit coupling, and a combining circuit. The balanced integrated circuit coupling couples a signal to the plurality of power amplifiers to the up-conversion module such that the power amplifiers amplify the signal to produce a... Agent: Garlick Harrison & Markison

20090251221 - Radio frequency front-end circuit: A radio frequency (RF) front end circuit includes a transformer coupled to a switch. The transformer converts a balanced transmit signal to an unbalanced transmit signal and converts an unbalanced receive signal to a balanced receive signal. The switch is configured to operate in first and second states. In the... Agent: Stmicroelectronics, Inc.