Amplifiers inventions 01/07

20070018718 - Microwave transmitter and the method for increasing envelope bandwidth: The microwave transmitter of the present invention can perform two-terminal dynamic modulation with respect to the voltage supply terminal and the RF input terminal of a RF power amplifier. The microwave transmitter of the present invention comprises a first modulator and a second modulator. The first modulator uses the baseband... Agent: Bacon & Thomas, PLLC

20070018719 - Class ab-d audio power amplifier: Audio power amplifier circuits that are arranged to operate in either a class AB or a class D operating mode. A drive circuit is configured to share control between a class AB driver and a class D modulator/driver circuit. The input signal level is monitored to determine their levels. When... Agent: Merchant & Gould PC

20070018720 - High efficiency amplifier circuits having bypass paths: Described herein are representative embodiments of amplifier bypass paths and amplifiers using such bypass paths. In certain exemplary embodiments, the amplifiers are operated as linear power amplifiers, such as may be used in wireless communications systems. According to one exemplary embodiment, an amplifier circuit is described comprising an amplifier path... Agent: Klarquist Sparkman, LLP

20070018721 - Driver circuit and method for driving a signal: Driver circuit for driving a transmit signal for a line comprising a signal amplifier which delivers a transmit signal, present at a signal input of the signal amplifier, amplified with a gain to a signal output, a line interface circuit which is connected between the signal output of the signal... Agent: Jenkins, Wilson, Taylor & Hunt, P. A.

20070018722 - Adaptive digital pre-distortion system: An adaptive Digital Pre-distortion System and a method for correcting especially power amplifier memory effects. In particular, the invention relates to an electronic circuit, for amplifying an input signal, comprising: a clipping unit for generating a signal, having a reduced peak-to-average power ratio by clipping the input signal; a pre-distorter... Agent: Sughrue Mion, PLLC

20070018723 - Enhanced efficiency feed forward power amplifier with delay mismatched error cancellation loop: A delay mismatched feed forward power amplifier is disclosed. Loop 1 includes a main amplifier and is used to derive a carrier cancelled sample of the main amplifier output. Loop 2 includes an error amplifier used to amplify the carrier cancelled signal derived from Loop 1 operation in order to... Agent: Myers Dawes Andras & Sherman, LLP

20070018724 - Integration improvement technique for switching amplifiers: A method of synchronizing static or dynamic dissimilar output sampling rates of multiple outputs of an integrated switching amplifier uses the step of synchronizing dissimilar static or dynamic sampling rates of multiple outputs to yield improved sonic quality, higher efficiency, lower EMI or other benefits. According to the preferred embodiment,... Agent: John G. Posa Gifford, Krass, Groh, Sprinkle,

20070018726 - Differential circuit, output buffer circuit and semiconductor integrated circuit for a multi-power system: An output buffer circuit includes: a differential circuit; and first and second load circuits coupled between the differential circuit and a high power supply voltage VDDH. Such a differential circuit includes first and second NMOS transistors having low-voltage gate dielectric layers susceptible to deterioration at operation above a maximum gate-body... Agent: Harness, Dickey & Pierce, P.L.C

20070018725 - Variable transconductance circuit: The variable transconductance circuit includes: a voltage-current conversion circuit for outputting a current signal linear with an input voltage signal; first and second MOS transistors for converting the current signal received to a square-root compressed voltage signal; and third and fourth MOS transistors for converting the square-root compressed voltage signal... Agent: Mcdermott Will & Emery LLP

20070018728 - Method and system for providing multi-carrier synthesis: A nyquist filter upsamples multiple input symbol streams. Separate first stage branch low-pass filters further upsample the streams. A tap at each filter has a delay different from the other branch(s) to extract symbols from different streams. The outputs of the low-pass filters are additively combined in one branch and... Agent: Arris International, Inc

20070018727 - Variable gain amplifier and wireless communication apparatus including the same: Disclosed is a variable gain amplifier. The variable gain amplifier includes a gain control unit to transmit input differential signals as they are when it operates in a high gain mode, and to transmit the signals by way of predetermined impedances when operating in a low gain mode, and an... Agent: Sughrue Mion, PLLC

20070018729 - Amplifier arrangement and method of signal amplification: An amplifier arrangement is proposed which has an amplifier with adjustable amplification having an output. An impedance transformer circuit is connected to the output. Said circuit is designed for transforming a high output impedance of the adjustable amplifier into a low impedance at its output. The amplifier arrangement contains at... Agent: Eschweiler & Associates, LLC National City Bank Building

20070018730 - Apparatus and method reducing non-linearity in an output signal of an amplifier device: An apparatus reducing non-linearity in an output signal presented at an output locus of an amplifier device having an output unit coupled with the output locus, the output unit having at least one first operating characteristic contributing to the non-linearity, includes a compensating unit coupled with the output locus. The... Agent: Law Office Of Donald D. Mondul C/o Portfolioip

20070013440 - Analog amplifier having dc offset cancellation circuit and method of offset cancellation for analog amplifiers: An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources. Selected ones of said current sources are coupled to the input node to adjust a DC voltage... Agent: Duane Morris, LLPIPDepartment

20070013438 - Chopper-stabilized operational amplifier and method: An amplifier circuit includes an input chopping circuit for chopping first and second input signals, a transconductance stage for amplifying an output of the chopping circuit and applying it to the input of a folded cascode stage, to the input of an un-chopping circuit, and to the input of a... Agent: Texas Instruments Incorporated

20070013439 - Circuit arrangement having an amplifier arrangement and an offset compensation arrangement: A circuit arrangement is disclosed herein comprising an amplifier circuit having inputs configured to receive an input signal, and an output configured to provide an output signal. The circuit arrangement further comprises a first operational amplifier. The first operational amplifier includes inputs coupled to the inputs of the amplifier circuit,... Agent: Maginot, Moore & Beck Chase Tower

20070013441 - 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 delta-sigma modulated signal, phase-delays the received delta-sigma modulated signal by a multiple of 360° for a bandwidth of the delta-sigma modulated basic... Agent: Dilworth & Barrese, LLP

20070013442 - Amplifier with feedback bridge: An amplifier, in particular for RF-applications, comprises a circuit board (2), at least one amplifier stage with at least one transistor package (8) arranged on the circuit board (2), and a feedback path (12) around the at least one transistor package (8), said feedback path (12) comprising a feedback element... Agent: Sughrue Mion, PLLC

20070013443 - Compartmental gain limiter and controlling method thereof: A compartmental gain limiter and a controlling method thereof. The compartmental gain limiter connects to an audio amplifier, which has a gain value and generates an output signal according to an input signal and the gain value. The compartmental gain limiter includes a comparator and a clamper. The comparator having... Agent: Rabin & Berdo, PC

20070013444 - Parallel path pre-distorted amplifier: A power amplifier (112) has a first non-linear power amplifier (202) for generating a first amplified signal (203) and a first pre-distortion signal (205) from the carrier signal. The first amplified signal has an amplified carrier component with non-linear distortions, while the first pre-distortion signal has an in-phase carrier component... Agent: Motorola, Inc.

20070013445 - Variable gain feedback amplifier circuit apparatus and method therefor: A variable gain feedback amplifier circuit comprising a degenerated common emitter circuit coupled to an emitter follower circuit, an output of the emitter follower circuit being coupled to an input of the degenerated common emitter circuit via a variable feedback impedance. An automatic gain controller is coupled to the variable... Agent: Avago Technologies, Ltd. C/o Klaas, Law, O'meara & Malkin, P.C.

20070008031 - Method and device for correcting signal distortions in an amplifier device: The present invention provides a method for the correction of signal distortions in an amplifier device (20), wherein a digital PWM modulator (17) is operated with a variable-frequency system clock (18). The present invention likewise provides a device for the correction of signal distortions in an amplifier device (20).... Agent: Maginot, Moor & Beck

20070008032 - Power amplifier and transmitter: A 90-degree phase delay power divider part PSPD is connected to an input side of a carrier amplifier Amp1 and a peak amplifier Amp2, and a variable electric length power combiner VTL2 is connected to an output side thereof. A control signal Sig is applied through a control terminal Ctrl... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070008033 - Predistortion amplifier for compensation distortion: A predistortion amplifier for compensating distortion includes an amplifying unit; a power detection unit; a distortion compensation table; a control unit; and a predistortion unit for generating a predistorted signal to be inputted to the amplifying device by performing a predistortion on the amplitude and a phase of the input... Agent: Bacon & Thomas, PLLC

20070008034 - Two stage microwave class e power amplifier: A load circuit for use with a switching mode circuit. The novel load circuit includes a series inductive-capacitive network coupled to an output of the switching mode circuit and a circuit for providing a capacitance coupled to the output of the switching mode circuit. In an illustrative embodiment, the circuit... Agent: Leonard A. Alkov, Esq. Raytheon Company

20070008035 - Wide-band high-gain limiting amplifier with parallel resistor-transistor source loads: An amplifier has a wide bandwidth and a high gain by using parallel loads. Each load has a load resistor and a load p-channel transistor in parallel. The drain voltages of differential n-channel transistors can be set by the load resistors, while switching current is provided by the load p-channel... Agent: Stuart T Auvinen

20070008036 - Miller-compensated amplifier: A Miller-compensated amplifier, having an amplifier input and an amplifier output, comprises a first gain stage, a second gain stage, a third gain stage, and a capacitor. The first gain stage has the amplifier input as a first gain stage input thereto and a first gain stage output. The second... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070008037 - High frequency power amplifier circuit and radio communication system: There is provided a high frequency power amplifier circuit capable of enhancing detection accuracy of an output level, necessary for feedback control of the high frequency power amplifier circuit, and capable of executing output power control with higher precision, With the high frequency power amplifier circuit, the detection of the... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20070008038 - Power amplifier arrangement, particularly for mobile radio, and method for determining a performance parameter: A power amplifier arrangement includes a power amplifier with an input for a radio-frequency signal and an output for delivering a second radio-frequency signal. The second radio-frequency signal has a current and a voltage. A second element is configured to deliver a first signal derived from the current of the... Agent: Eschweiler & Associates, LLC National City Bank Building

20070008039 - Apparatus and method for reducing drain modulation of high power transistor: An apparatus and a method for reducing drain modulation in a high power amplifier are provided, in which an adder supplies a current corresponding to a voltage reduced by a drain modulation, and a bias unit adds the current supplied from the adder to a DC bias and supplies the... Agent: Roylance, Abrams, Berdo & Goodman, L.L.P.

20070001756 - System for reducing calibration time of a power amplifier: A system for reducing the calibration time of a Power Amplifier (PA) (202) is provided. The system includes a memory module (304) that is integrated in the PA. The memory module is configured to store one or more calibration parameters of the PA.... Agent: Motorola Inc

20070001757 - Switched capacitor system with and method for output glitch reduction: A switched capacitor system with output glitch reduction step charges the switched capacitor by switching it to a first voltage level in a first phase, to an intermediate voltage level of a pre-charge node in a pre-charge phase and to the voltage level of the output node of the amplifier... Agent: Iandiorio & Teska

20070001758 - Multiple differential amplifier system and method for transconductance mismatch compensation: A multiple differential amplifier system and method for transconductance mismatch compensation which in a first phase connects to a differential switched input of a null amplifier, the differential signal input of the main amplifier, inverted, for compensating for offset errors and transconductance mismatches in the null amplifier; and storing in... Agent: Iandiorio & Teska

20070001759 - Signal level adjusting apparatus, gain value updating method, and program: A signal level adjusting apparatus comprises an amplifier that amplifies an input signal with a gain of a first gain value and outputs an amplified signal; a gain calculator that obtains a second gain value according to a signal level of the input signal; and a gain updater that updates... Agent: SocalIPLaw Group LLP

20070001760 - Buffer amplifier: A buffer amplifier, which includes a first differential signal amplifier including first and second NMOSFETs (N-type metal-oxide semiconductor field-effect transistors) amplifying differential input signals; a second differential signal amplifier including first and second PMOSFETs (P-type metal-oxide semiconductor field-effect transistors) amplifying the differential input signals; a first feedback resistor including an... Agent: Sughrue Mion, PLLC

20070001761 - Differential amplifier and operational amplifier: In a differential amplifier and an operational amplifier each for amplifying a signal, a differential signal composed of first and second signals is inputted to a couple of input terminals (1, 2). When the voltage of the first signal is, e.g., less than the voltage value of a reference voltage... Agent: Mcdermott Will & Emery LLP

20070001762 - Dc-dc converter switching transistor current measurement technique: A method is described comprising conducting a first current through a switching transistor. The method also comprises conducting a second current through a pair of transistors whose conductive channels are coupled in series with respect to each other and are together coupled in parallel across the switching transistor's conductive channel.... Agent: Schwegman, Lundberg, Woessner & Kluth, P.A.

20070001763 - Apparatus and method for canceling dc output offset: A transconductor for substantially canceling or reducing a direct current (DC) output offset and a method thereof are provided. The transconductor includes a differential amplifier, a sensing circuit, and a feedback current generation circuit. The differential amplifier outputs output signals having a DC output offset therebetween due to a difference... Agent: F. Chau & Associates, LLC

20070001764 - Signal dependent biasing scheme for an amplifier: In one embodiment, the present invention includes an apparatus having a first amplifier stage to receive an input voltage and to provide an amplified output voltage at an output terminal, where the first amplifier stage is controlled by a first bias current. The apparatus may further include a second amplifier... Agent: Trop Pruner & Hu, PC

20070001765 - Monolithic transformer based amplifier for integrated circuits: Monolithic transformer based amplifier for integrated circuits. The amplifier includes an input transformer with a first impedance transforming ratio. The input transformer includes a coupled line structure. An amplification circuit is coupled to the input transformer. The amplifier also includes an output transformer with a second impedance transforming ratio that... Agent: Avago Technologies, Ltd.

20070001766 - Automatic bias control circuit for linear power amplifiers: According to an exemplary embodiment, an amplification module includes a power amplifier configured to receive an RF input signal and provide an RF output signal. The amplification module further includes an autobias control circuit configured to receive and convert the RF output signal to a control signal. The control signal... Agent: Farjami & Farjami LLP

20070001767 - Systems and methods for ramping power amplifier output power: A power amplifier circuit including a first transistor, a second transistor, and a power control circuit. The first transistor includes a first input and a first output. The second transistor includes a second input coupled in series with the first output of the first transistor. The input circuit is coupled... Agent: Sterne, Kessler, Goldstein & Fox PLLC

20070001768 - Broadband low noise amplifier and rf signal amplification method of the same: A broadband low noise amplifier and amplification method is provided. The broadband low noise amplifier includes an input terminal into which a radio frequency (RF) signal received by an antenna is input, an output terminal from which an amplified RF signal is output, at least one gain control part connected... Agent: Sughrue Mion, PLLC

20070001769 - Ultra-wideband constant gain cmos amplifier: Circuitry and methods for improved amplifiers with large bandwidth and constant gain are provided. The combination of a synthetic inductive drain load and a bridged-T matching network provide amplifiers that can drive a substantial capacitive load with the above mentioned improvements over prior amplifiers. Additionally, circuits presented allow for improved... Agent: Fish & NeaveIPGroup Ropes & Gray LLP