Amplifiers inventions 03/08

20080068074 - Efficient narrow band amplification using linear amplifier: An amplifier system having one or more signal paths. Each path includes a linear amplifier and a Class G Type amplifier. The linear amplifier receives an input signal bearing phase and amplitude information. The Class G Type amplifier receives an envelope signal which tracks the anticipated output signal, plus a... Agent: Townsend And Townsend And Crew, LLP

20080068075 - Trifferential amplifier and trifferential amplifier system: A multi-fferential amplifier system includes an amplifier having a plurality of amplifier inputs and a plurality of amplifier outputs; a plurality of input terminals for receiving a plurality of inputs and being interconnected with the amplifier inputs through a plurality of input impedances, respectively, and a feedback network including a... Agent: Iandiorio & Teska

20080068076 - Impedance matched variable gain low noise amplifier using shunt feed-back: The variable gain amplifier includes a forward path that provides the amplifier variable gain, and a feedback path. The feedback path uses a switch that is turned on at low gain levels. The switch taps into the feedback resistor, shunting it to signal-ground and eliminating the feedback mechanism. This ensures... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20080068077 - Unilateral feedback power amplifier and method for realizing the same: A unilateral feedback power amplifier utilizes new feedback techniques and devices to make the amplified high-frequency signal unilateral, let the output power, power gain and impedance matching simultaneously accomplish the optimal values, and enhance the stability of the system. In this feedback amplifier, a generalized multi-port feedback circuit is in... Agent: Rosenberg, Klein & Lee

20080068078 - Doherty amplifier: A Doherty amplifier includes a Doherty amplification circuit and an active bias circuit. The active bias circuit includes an average power detector for detecting a value of a voltage representing an average power of an input signal, an envelop detector for detecting an envelop of the input signal, a threshold... Agent: Bacon & Thomas, PLLC

20080068079 - Efficient narrow band amplification using phase amplifier: An amplifier system having one or more signal paths. Each path includes a phase amplifier and a Class G Type amplifier. The phase amplifier receives an input signal bearing phase information. The Class G Type amplifier receives an envelope signal bearing amplitude information. The output of the Class G Type... Agent: Townsend And Townsend And Crew, LLP

20080068080 - Spectrum analyzing method, distortion detector and distortion compensation amplifying device: The distortion detector for detecting distortion in a frequency area with respect to an input signal includes a time window processing section for multiplying the input signal by a time window; an averaging processing section for averaging an output of the time window processing section; an FFT processing section 52... Agent: Mcginn Intellectual Property Law Group, PLLC

20080068081 - High-voltage operational amplifier input stage and method: Circuitry for preventing damage to differentially coupled input JFETs in an integrated circuit amplifier includes first (J2) and second (J4) differentially coupled input JFETs. A first input signal (Vin+) is applied to a gate of the first input JFET (J2), and second input signal (Vin−) is applied to a gate... Agent: Texas Instruments Incorporated

20080068082 - Amplifier circuit and communication device: An amplifier circuit according to the present invention comprises: a first differential amplifier circuit including a first transistor having a gate terminal forming a first input node, a second transistor having a gate terminal forming a second input node and having a dimensional ratio with respect to the first transistor... Agent: Amin, Turocy & Calvin, LLP

20080068083 - Continuous time common mode feedback circuit, system, and method: Embodiments of the present invention provide a low voltage continuous time common mode feedback (CMFB) module, for low voltage operational amplifiers, providing good linearity, wide bandwidth and low systematic offset. The common mode feedback module includes a controlling module and an initializing module. The controlling module and the initializing module... Agent: Paul F. Rusyn Graybeal Jackson Haley LLP

20080068084 - Serial link output stage differential amplifier and method: Protection for the transmission of higher amplitude outputs required of differential amplifiers formed by thin oxide transistors with limited maximum voltage tolerance used where compliance with communication protocol standards requires handling voltages which may, in transition, exceed desirable levels is provided by limiting the voltage across any two device terminals... Agent: Ibm Corporation

20080068085 - Wide input common mode for input bias current cancellation: Described herein is technology for, among other things, input bias current cancellation. The technology includes a bipolar differential pair coupled with a supply voltage (VCC). The bipolar differential pair includes a first transistor and a second transistor. The technology further includes an input bias current cancellation circuit coupled with the... Agent: Murabito,hao & Barnes, LLP

20080068086 - High frequency power amplifier circuit and electronic component for high frequency power amplifier: In a high frequency power amplifier circuit that supplies a bias to an amplifying FET by a current mirror method, scattering of a threshold voltage Vth due to the scattering of the channel impurity concentration of the FET, and a shift of a bias point caused by the scattering of... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20080068087 - Automatic-gain control circuit: An automatic-gain control circuit includes a variable-gain amplifier, a peak-detecting circuit, and an adjustable charge/discharge circuit. The variable-gain amplifier receives an input signal and adjusts the input signal based on a gain-factor control signal for generating a corresponding output signal. The peak-detecting circuit is coupled to the variable-gain amplifier for... Agent: North America Intellectual Property Corporation

20080068088 - Amplifier circuit: An amplifier circuit is provided for amplifying an input signal with a vertically integrated cascode. The cascode comprises a collector semiconductor region of a collector, a first base semiconductor region, adjacent to the collector semiconductor region, of a first base, a second base semiconductor region of a second base, an... Agent: Mg-ip Law, PLLC

20080068089 - Differential amplifier circuit with symmetric circuit topology: A differential amplifier circuit receives a pair of input signals to develop an output signal. First and second MOS transistors have commonly-connected gates and sources. A third MOS transistor has a drain connected to the commonly-connected gates, and a source connected to the first MOS transistor's drain. The third MOS... Agent: Mcginn Intellectual Property Law Group, PLLC

20080061871 - Power amplifier: A power amplifier includes: a plurality of field effect transistors connected in parallel and each having a first and second ends, the first end being connected to ground; an amplifying unit which includes at least one of an inductor, a capacitor and a band pass filter and has a third... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080061872 - Gain adjustment for programmable gain amplifiers: A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback to the amplifier while the gain adjust circuit is arranged to boost or cut the gain of the... Agent: Merchant & Gould PC

20080061873 - Gain adjustment for programmable gain amplifiers: A programmable gain amplifier (PGA) circuit includes a gain adjust circuit and a gain select circuit that are both coupled to an output of an amplifier. The gain select circuit completes feedback to the amplifier while the gain adjust circuit is arranged to boost or cut the gain of the... Agent: Merchant & Gould PC

20080061874 - System and method for power amplifier output power control: A system for controlling amplifier power is provided. The system includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the... Agent: Mr. Christopher John Rourk Jackson Walker LLP

20080061875 - System and method for power amplifier output power control: An architecture for detecting amplifier power is provided. The architecture includes a voltage envelope detector that receives a voltage signal and generates a voltage envelope signal. A current envelope detector receives a current signal and generates a current envelope signal. A power amplifier level controller receives the greater of the... Agent: Mr. Christopher John Rourk Jackson Walker LLP

20080061876 - Methods and apparatus to reduce substrate voltage bounces and spike voltages in switching amplifiers: Methods and apparatus to reduce voltage bounces and spike voltages in switching amplifiers are disclosed. An example apparatus to reduce spike voltages in a switching amplifier disclosed herein comprises an input to sense an output voltage of the switching amplifier, and a pull-down circuit to electrically couple the apparatus with... Agent: Texas Instruments Incorporated

20080061877 - Common mode regulation for thermal tail compensation: A waveform processing system, and associated methods and apparatus, may include a common mode feedback compensation circuit to adjust a voltage supplied to a differential circuit so as to substantially reduce or eliminate signal distortion associated with thermal tails. In an illustrative example, a feedback circuit may control a supply... Agent: Lecroy Corporation

20080061878 - Differential amplifier and sampling and holding circuit: Disclosed is a differential amplifier including: first and second transistors each having a first gate, a second gate, a source, and a drain open to a drain side, the first gate and the second gate being controlled independently, a differential input being supplied to between the first gates of the... Agent: Amin, Turocy & Calvin, LLP

20080061879 - Filter circuit and method thereof: A filter circuit is disclosed which comprises a differential amplifier and a switch-capacitor circuit. The invention attains the goals of reducing the power consumption and the circuit size by sharing an amplifier with other related circuits to reduce the number of amplifiers.... Agent: Birch Stewart Kolasch & Birch

20080061880 - Input buffer design using common-mode feedback (cmfb): An input buffer includes a first stage for receiving an input signal and having a first pair of complementary output signals, the first stage including an input circuit for receiving the input signal, an output circuit for generating the first pair of complementary output signals based on the input signal,... Agent: Dickstein Shapiro LLP

20080061881 - Differential amplifier circuit, voltage regulator using the differential amplifier circuit, and method for controlling the differential amplifier circuit: A differential amplifier circuit, a voltage regulator using the differential amplifier circuit, and a method for controlling the differential amplifier circuit. The circuit includes a differential pair having a plurality of transistors, a first bias current generator circuit part to generate a first bias current to the differential pair, and... Agent: Dickstein Shapiro LLP

20080061882 - Amplifier coupling on a reduced area: The invention discloses an amplifier (200, 400, 500) coupling comprising a first (230), a second (240), a third (250) and a fourth (260) transistor, additionally comprising a signal input port (220) and a signal output port (210, 410). The input port of the amplifier is connected to the first, second,... Agent: Ericsson Inc.

20080061883 - Thermal tail compensation: A waveform processing system may include a compensation circuit to adjust a voltage supplied to an output stage, wherein a supplied voltage is controlled to substantially maintain constant power dissipation in the output stage, and wherein the compensation circuit is configurable independently from the amplification stage. In an illustrative embodiment,... Agent: Lecroy Corporation

20080061884 - Amplifier feedback and bias configuration: A wireless communication device output amplifier configured to reduce or eliminate out of band oscillations from voltage standing waves generated by antenna impedance mismatch reflection. The amplifier is configured with an input, output, and biasing node. The biasing node is configured to receive a biasing signal from a biasing amplifier.... Agent: Weide & Miller, Ltd.

20080061885 - Tunable low noise amplifier: Tunable low noise amplifier using an RF current feed back loop (L) coupled between input (IM) and output (OM) means and including first (CAI) and second (CA2) serially coupled first order lowpass RF current amplifiers as well RF current inverter means (INV). To obtain narrow bandpass selectivity within a relatively... Agent: Robert M. Mcdermott, Esq.

20080061886 - Amplifier arrangement and method for amplifying a signal: A power amplifier comprises a control signal generator providing a first and a second signal, a first amplifier comprising a first transistor and a first cascode transistor for the amplification of the first signal, a second amplifier comprising a second transistor and a second cascode transistor for the amplification of... Agent: Eschweiler & Associates LLC

20080061887 - Apparatus for converting single-ended signal into differential signal: The present invention discloses a single-ended input/differential output amplifier includes a first bonding wire, a transduction gain circuit coupled to the first bonding wire for receiving an input voltage, a gain control circuit coupled to the transduction gain, a load unit with an end coupled to the gain control circuit... Agent: Rosenberg, Klein & Lee

20080054999 - Input offset voltage corrector: An input offset voltage corrector used in an operational amplifier includes a switch unit, a register unit, an offset voltage correction unit and a micro control unit. The micro control unit sets the register unit to control the switch unit to switch the input offset voltage corrector to different operating... Agent: Rosenberg, Klein & Lee

20080055000 - Amplification apparatus: An amplification apparatus that has a distortion detection loop that detects distortion components contained in an amplified signal to be amplified that is amplified by an amplifier 3, and a distortion removal loop that removes distortion components from the amplified signal, using the distortion components detected by the distortion detection... Agent: Wenderoth, Lind & Ponack, L.L.P.

20080055001 - Power amplifying apparatus and mobile communication terminal: A power amplifying apparatus includes an input terminal configured to receive an input signal, a first power amplifier biased for class A or class AB operation which is configured to amplify the input signal, an output terminal connected to an output of the first power amplifier, a second power amplifier... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080055002 - Amplifier with variable impedance transformation and method of amplification using the same: A radio frequency (RF) amplifier includes an RF drive adjust circuit adapted to receive an input signal and adjust at least one of the amplitude and phase thereof to output a drive-adjusted input signal; a gain element adapted to amplify the drive-adjusted input signal and to output an amplified signal;... Agent: Kathy Manke Avago Technologies Limited

20080055003 - Reduction of voltage spikes in switching half-bridge stages: A path configuration for a power switch and driver can introduce independent parasitic inductance coupled to the power switch to slow a switching speed of the switch and reduce voltage spikes on the switch during switching events. The path for low side supply of the drive to the negative DC... Agent: Texas Instruments Incorporated

20080055004 - Amplifiers, methods of increasing current gain in amplifiers, and imaging devices: An amplifier includes a differential stage including a differential pair of transistors of a first conductivity type, the differential pair having gates, first and second inputs to the amplifier respectively including the gates of the differential pair; a current sum branch coupled to the differential stage, the current sum branch... Agent: Wells St. John P.s.

20080055005 - Feedback-type variable gain amplifier and method of controlling the same: A feedback-type variable gain amplifier including a first field effect transistor, a feedback circuit, and a load circuit. The first field effect transistor receives an input voltage signal through an input node, amplifies the input voltage signal, and outputs the amplified input voltage signal through an output node. The feedback... Agent: F. Chau & Associates, LLC

20080055006 - 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