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Amplifiers December patent applications/inventions, industry category 12/09

20090322419 - Amplifying apparatus using magneto-resistive device: An amplifying apparatus includes a magneto-resistive device which has a magnetic free layer, a magnetic pinned layer having a magnetic moment larger than that of the magnetic free layer, and an intermediate layer provided in between the magnetic free layer and the magnetic pinned layer. The amplifying apparatus has a... Agent: Fitzpatrick Cella Harper & Scinto

20090322420 - Feedback biasing technique for a stage of an amplifier that uses a feedback control loop having low gain: According to an aspect of the present invention, a stage of an amplifier contains a positive feedback loop in addition to a negative feedback loop to maintain the bias currents at a desired level in the active components providing the output of the amplifier. The positive feedback loop senses the... Agent: Texas Instruments Incorporated

20090322421 - Power efficient transmitter with high dynamic range: One embodiment of the present invention relates to a method for transistor matching. The power transmitter comprises a first, second, and third amplification path. The paths are selectively activated and deactivated to output a received signal with high efficiency and linearity. The first amplification path is configured to receive a... Agent: Eschweiler & Associates LLC

20090322422 - Signal amplification: Apparatus for amplifying a signal, the apparatus comprising an amplifier (12) powered by a power supply (14), a monitor (20) for monitoring an output signal of the amplifier (12) and a controller (22) operative to adjust the power supply (14) if distortion is detected in the output signal of the... Agent: Fitzpatrick Cella Harper & Scinto

20090322423 - Method and system for polar modulating qam signals with discontinuous phase: Aspects of a method and system for polar modulating QAM signals with discontinuous phase may include amplifying a signal via a plurality of amplifiers such that a combined gain of the plurality of amplifiers comprises a coarse amplitude gain and an amplitude offset gain. A gain of one or more... Agent: Mcandrews Held & Malloy, Ltd

20090322425 - Distortion compensating amplifier and front-end distortion compensation amplifying device: A distortion compensating amplifier including a forward circuit and a feedback circuit and performing distortion compensation of a signal in the forward circuit by use of a gain of the feedback circuit, includes a detecting unit which detects that the gain of the forward circuit is changed, a calculating unit... Agent: Hanify & King Professional Corporation

20090322424 - Power amplifier with pre-distorter: Amplifier apparatus comprising a power amplifier having an operating frequency in the radio frequency or microwave or higher ranges and a pre-distorter, the characteristics of the power amplifier comprising a distortion from a linear transfer function. The pre-distorter comprises a non-linear path and a linear path including amplifiers having substantially... Agent: Freescale Semiconductor, Inc. Law Department

20090322426 - Output short circuit and load detection: One embodiment of an apparatus for testing an amplifier includes an amplifier having a driver and a filter, the filter being connected between an output of the driver and an output of the amplifier. The filter is operable to produce a demodulated output signal from a higher frequency modulated signal... Agent: Texas Instruments Incorporated

20090322427 - Transistor and routing layout for a radio frequency integrated cmos power amplifier device: An integrated CMOS power amplifier system to improve amplifier performance, the integrated CMOS power amplifier system including a plurality of differential main amplifier cores, a plurality of ground pads, and a plurality of routes to connect the plurality of differential main amplifier cores to the plurality of ground pads. Each... Agent: HolmanIPLaw

20090322428 - Tunable linear operational transconductance amplifier: A tunable, linear operational transconductance amplifier includes a differential voltage to current conversion unit adapted to generate first and second output signals at respective first and second output nodes responsive to first and second differential input signals. A first current amplification unit is adapted to generate a third output signal... Agent: Stmicroelectronics, Inc.

20090322429 - Variable gain current input amplifier and method: Variable gain circuitry includes a first input transistor (M1) having a source coupled to a first conductor (32), a gate coupled to a first input voltage (Vin+), and a drain coupled to a second conductor (30). An input of a first current mirror (M3,M4) is coupled to the second conductor... Agent: Texas Instruments Incorporated

20090322430 - Semiconductor package with reduced inductive coupling between adjacent bondwire arrays: A semiconductor package (20) includes circuits (22, 24). The circuit (22) includes electrical devices (52, 54) interconnected by a bondwire array (62). Likewise, the circuit (24) includes electrical devices (58, 60) interconnected by a bondwire array (64). Signal wires (76) of the bondwire array (62) are proximate to signal wires... Agent: Meschkow & Gresham, P.L.C

20090315620 - Power amplifier: A power amplifier based on EER technology or ET technology extracts an amplitude-modulated component from a modulated signal as an input signal which includes the amplitude-modulated component and a phase-modulated component, and decomposes the amplitude-modulated component into two control signals whose product is proportional to the amplitude-modulated component. One of... Agent: Dickstein Shapiro LLP

20090315621 - Amplifier with gain expansion stage: Techniques are disclosed for extending an amplifier's linear operating range by concatenating an amplifier exhibiting gain compression with a gain expansion stage. In an exemplary embodiment, a gain expansion stage incorporates a Class-B stage, a Class-AB stage, or a combination of the two. In an exemplary embodiment, both the gain... Agent: Qualcomm Incorporated

20090315622 - Feedforward amplifier and control method thereof: In a feedforward amplifier (200) including a signal cancellation circuit (10) and a distortion eliminating circuit (20), a harmonic reaction amplifier (130) is used as a main amplifier of the signal cancellation circuit. A controller (43) obtains an adjacent channel leakage power ratio (ACLR) and a power efficiency from an... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, L.L.P.

20090315623 - Class d audio amplifier: A class D amplifier (1) comprises an input unit (11) for receiving a digital input signal (Vin), a pulse shaping unit (12) for producing pulse shaped signals in dependence of the input signal (Vin), a comparator unit (13) for comparing the pulse shaped signals and producing a comparator signal, a... Agent: Nxp, B.v. Nxp Intellectual Property & Licensing

20090315624 - Active resistor used in a feedback amplifier particularly useful for proximity communication: An active resistor and its use in a negative feedback amplifier allow wide voltage swings on the input and output signals. One embodiment includes parallel pass-gate MOS transistors of opposite conductivity types connected between the input and output nodes. Bootstrapping transistors are connected between the gates of the pass-gate transistors... Agent: Pvf -- Sun Microsystems Inc. C/o Park, Vaughan & Fleming LLP

20090315625 - Method and system for processing signals via an integrated low noise amplifier having configurable input signaling mode: Aspects of a method and system for processing signals via an integrated low noise amplifier having a configurable input signaling mode are provided. For an unbalanced input signal, a first input terminal of the LNA may be communicatively coupled to ground via an inductance and a bias point of the... Agent: Mcandrews Held & Malloy, Ltd

20090315626 - High sensitivity optical receiver employing a high gain amplifier and an equalizing circuit: An optical receiver includes a light receiving element for converting an optical signal to an electrical signal having a first bandwidth and an amplifier for amplifying the electrical signal. The amplifier has a first gain response that yields a second bandwidth that is less than the first bandwidth. The optical... Agent: Motorola, Inc. Law Department

20090309653 - Chopper stabilized amplifier: A chopper stabilized amplifier has differential inputs, an output, and a low frequency path and a high frequency path from the differential inputs to the output. Chopping occurs, at a chopping frequency, of a differential signal at differential inputs and outputs of an amplifier stage of the low frequency path... Agent: Fliesler Meyer LLP

20090309654 - System and method of altering a pwm carrier power spectrum: In a particular embodiment, a circuit device includes an input to receive a pulse-width modulated (PWM) signal and an output to send a modulated PWM signal. The circuit device further includes a pulse edge control circuit coupled between the input and the output. The pulse edge control circuit receives the... Agent: Schwegman, Lundberg & Woessner, P.A.

20090309656 - Multiple output power mode amplifier: A multi-mode power amplifier and an electronic device including the amplifier are described.... Agent: Kathy Manke Avago Technologies Limited

20090309655 - Power amplifier: A power amplifier includes: an amplifying transistor; a bias circuit; a first diode; a second diode; a matching attenuating circuit; a first current mirror circuit; a serial resonant circuit, and a switch. In an amplification mode, the bias circuit supplies a bias current to the amplifying transistor, and the first... Agent: Leydig Voit & Mayer, Ltd

20090309657 - Predistortion apparatus, system, and method: The present invention discloses a predistortion apparatus, a predistortion system and a predistortion method. The predistorter comprises a modular value calculating section, for performing modular arithmetic on an information source input signal inputted from an information source; an orthogonal lookup table value acquiring section, for searching N stored lookup tables... Agent: Hanify & King Professional Corporation

20090309658 - Method and apparatus for power converter for class d audio power amplifiers: A method and apparatus for power conversion in a class D amplifier is provided. The power conversion is achieved using synchronous rectifiers in a regulated half bridge power supply, taking the sum of the positive and negative rails as feedback, in order facilitate energy transfer between positive and negative output... Agent: The Hecker Law Group

20090309660 - Device for amplifying a broadband rf signal: The present invention relates to a microwave signal amplification device comprising a cascode cell (60). The cascode cell comprises at least two transistors (31, 32). The gate of a first transistor (31) is connected to the input (E) of said device, the drain of the second transistor (32) is connected... Agent: Darby & Darby P.C.

20090309659 - Solid-state ultra-wideband microwave power amplifier employing modular non-uniform distributed amplifier elements: A number of identical non-uniformly distributed ultra-wideband power amplifier string building blocks are coupled together to form an ultra-wide bandwidth high-power amplifier. The non-uniform distribution results in an amplifier utilizing modular string building blocks that have input and output impedances with only real values. This permits the strings to be... Agent: Bae Systems

20090309661 - Systems and methods for switching mode power amplifier control: Embodiments of the invention may provide for enhancement systems and methods for a power amplifier output control system. In an example embodiment, driver amplifier control may be provided in conjunction with power amplifier control to improve the power efficiency and/or dynamic range of the transmitter system. Furthermore, control over the... Agent: Sutherland Asbill & Brennan LLP

20090309662 - Systems and methods for power amplifier with integrated passive device: Embodiments of the invention may provide for systems and methods for providing a power amplifier with integrated passive device, thereby improving the performance of the power amplifier. The power amplifier may include a signal amplification section, a power combining section, and a coupling device section that interconnects the signal amplification... Agent: Sutherland Asbill & Brennan LLP

20090309663 - Power amplifiers having improved protection against avalanche current: A power amplifier for use in a radio frequency (RF) transmitter or other device exhibits improved protection from voltage standing wave ratio (VSWR) issues emanating from avalanche currents. The amplifier circuit includes a power transistor having a base terminal, and a mirror transistor having a collector terminal and a base... Agent: Ingrassia Fisher & Lorenz, P.C. (fs)

20090302936 - Amplifiers using gated diodes: A circuit comprises a control line and a two terminal semiconductor device having first and second terminals. The first terminal is coupled to a signal line, and the second terminal is coupled to the control line. The two terminal semiconductor device is adapted to have a capacitance when a voltage... Agent: Ryan, Mason & Lewis, LLP

20090302937 - Amplifier using sigma-delta modulation and method for adjusting errors of the amplifier thereof: An amplifier includes a sigma-delta modulating circuit, a power stage circuit, two feedback components, an error suppressing circuit, and a selecting circuit. The sigma-delta modulating circuit generates two input voltages according to two input signals or one single-ended signal. The power stage circuit provides two output voltages according to the... Agent: North America Intellectual Property Corporation

20090302938 - Low delay corrector: A low delay corrector (LDC) unit includes a non-linear function generator and a filter. The nonlinear function generator receives a first signal and outputs a second signal in dependence on the first signal and a transfer function of the nonlinear function generator. The filter is fed in dependence on the... Agent: Fliesler Meyer LLP

20090302939 - Power amplifier with digital pre-distortion: A power amplifier using a digitally pre-distorted compound semiconductor transistor is discussed. The amplifier has improved linearity. For a given gate bias voltage, there exists a drain voltage at which the drain current is the same for a pulsed signal as for a DC signal and is invariant to quiescent... Agent: Howard & Howard Attorneys PLLC

20090302940 - Predistortion with sectioned basis functions: A predistortion actuator is provided. The predistortion actuator includes a plurality of branches, each of which implements a basis function that acts on a digital input signal. For at least one of the branches, the respective basis function is a sectioned basis function, where each section of the sectioned basis... Agent: Smart & Biggar P.o. Box 2999, Station D

20090302941 - Joint optimisation of supply and bias modulation: A radio frequency amplifier system is disclosed in which the amplifier bias supply and power supply voltages are >instantaneously modulated with signals derived from the envelope voltage of the input signal. Separate non-linear mapping functions are used to derive the supply and bias voltages. The two mapping functions are optimised... Agent: Demont & Breyer, LLC

20090302943 - Class d amplifier: A class D amplifier including a PWM circuit, a buffer amplifying circuit, a low-pass filter, and two current sources is provided. The PWM circuit transfers an analog signal into a PWM signal. The buffer amplifying circuit amplifies the PMW signal and generates an amplified signal. The low-pass filter will filter... Agent: Patterson & Sheridan, LLP - - - Iptec

20090302942 - D-class amplifier: A D-class amplifier that can suppress noise generated when a D-class amplification operation is started/stopped. When a D-class amplification operation is started/stopped, the pulse widths and pulse interval of output signals Pout1, Pout2 are gradually changed, so it is possible to prevent a large variation in the signal fed as... Agent: Texas Instruments Incorporated

20090302945 - Linearizing technique for power amplifiers: Embodiments described herein relate to amplification circuits. In some embodiments the amplification circuit includes a power amplifier, a feedforward error compensation loop, and phase feedback and amplitude feedback error compensation loops nested within the feedforward loop. The two nested feedback loops provide a “pre-cleaning” action, which reduces the amount of... Agent: Raytheon Company C/o Daly, Crowley, Mofford & Durkee, LLP

20090302944 - Noise-shaped blocker-reject amplifier: A fully differential amplifier that amplifies and filters a signal band of a communications channel, the signal band including a desired signal and at least one blocker signal of an adjacent communications channel, the fully differential amplifier includes a fully differential operational amplifier (op-amp) with a common mode feedback, the... Agent: Rahman LLC

20090302948 - Post amplifier with selectable gain: A selectable gain amplifier includes two or more selectable gain stages, each gain stage having a first input coupled to receive an input signal, a second input, and an output. The amplifier further includes and two or more feedback paths coupled between the outputs and the second inputs of the... Agent: Marger Johnson & Mccollom, P.C.

20090302947 - Semiconductor device: A semiconductor device including: a gain control circuit; a first circuit which is controlled a gain to be constant by the gain control circuit; and a bias circuit connected to the first circuit, wherein the first circuit including a first transistor; and a load resistance, an amplification factor or an... Agent: Katten Muchin Rosenman LLP

20090302946 - Variable gain amplifier having linear-in-db gain characteristic: A variable gain amplifier (VGA) with a linear-in-dB gain characteristic is provided. The VGA includes: a control signal converter which converts an input gain control signal VC, which is input so that the VGA obtains a linear-in-dB gain characteristic to the maximum gain, into an output gain control signal Vx=VTln((1/m)exp(−VC/VT)−1)... Agent: Jae Y. Park

20090302949 - Bias circuit and amplifier using the same: A bias circuit including: a first current source which generates a first current; a second current source which generates a second current having a temperature-to-output current characteristic that an output current characteristic increases or decreases with a change in temperature to intersect with that of the first current; a first... Agent: Turocy & Watson, LLP

20090302950 - Single input dual output voltage power supply and method therefor: In one embodiment, a power supply controller is configured to form both positive and negative supply voltages from a single input voltage so the maximum differential voltage across a load that uses the positive and negative supply voltages is no greater than the maximum value of the input voltage... Agent: Semiconductor Components Industries, LLC Intellectual Property Dept. - A700

20090295472 - Switch-around low noise amplifier: A switch-around low noise amplifier (LNA) device includes an input for receiving an input signal; an output for outputting an output signal; an LNA transistor coupled between the input and the output; a bypass switch circuit coupled between the input and the output; a current mirror circuit operatively connected to... Agent: Kathy Manke Avago Technologies Limited

20090295473 - Power amplifier architectures: Implementations and examples of power amplifier devices, systems and techniques for amplifying RF signals, including power amplifier systems based on Composite Right and Left Handed (CRLH) metamaterial (MTM) structures.... Agent: Fish & Richardson, PC

20090295474 - Device with shared power amplifiers, for use in a wireless telecommunications system: The invention discloses a device (300, 400) for a wireless telecommunications system, comprising a first plurality of power amplifiers (341-344, 450), each with an input and an output port. The device also comprises means (350, 440) for distributing a second plurality of input signals over the input ports of the... Agent: Ericsson Inc.

20090295475 - Transformer-capacitor enhancement circuitry for power amplifiers: Circuitry for providing improved pulse-type enhancement of the voltage supplied to a power amplifier (101) that is fed by a power supply that is connected to the power amplifier (101) at a feeding point through a main supply path that is connected via an inductor (L1). A second feeding point... Agent: Marsteller & Associates

20090295476 - Fully differential dc offset device circuit: A fully differential DC offset device circuit utilized in a high-pass filter is provided. The fully differential DC offset device circuit includes a first amplifying circuit, a second amplifying circuit and a Miller capacitor. The first amplifying circuit includes a first transistor and a second transistor, wherein a base of... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20090295477 - Ahuja compensation circuit for operational amplifier: A frequency compensated operational amplifier includes: an input stage, for receiving an input signal; an output stage, coupled to the input stage, for generating an output signal according to an output of the input stage; a first current source, for providing a first bias current; a second current source, for... Agent: North America Intellectual Property Corporation

20090295479 - Amplifier and offset regulating circuit: An amplifier includes a signal amplification part that outputs an output signal obtained by amplifying an input signal and a common mode voltage VCM of the output signal, and a common mode feedback part that outputs a signal according to a difference between the common mode voltage VCM and a... Agent: Sughrue Mion, PLLC

20090295480 - Amplifier circuit: An amplifier of the present invention is provided with an amplifier MOS transistor, a diode-connected transistor block for negative feedback source impedance constituted by series-parallel connection of the limited number (including 0) of the diode-connected MOS transistors and connected to a source side of the amplifier MOS transistor, and a... Agent: Turocy & Watson, LLP

20090295478 - Amplifier using impedance circuit for canceling cutoff: An amplifier circuit includes a pair of transistors amplifying differential signals of input signals to respective input terminals and outputting differential output signals to respective output terminals, and an impedance circuit provided in between sources of the pair of transistors, canceling a first cutoff characteristic on a high frequency side... Agent: Greer, Burns & Crain

20090295481 - High speed differential to single ended converting circuit: A differential to single ended converting circuit includes a transconductance circuit having input terminals for receiving differential input voltages and having a first current output terminal for outputting a first current and a second current output terminal for outputting a second current; an offset cancellation circuit having a first controllable... Agent: Wpat, PC Intellectual Property Attorneys

20090295482 - Driving amplifier circuit with digital control: A driving amplifier circuit includes: a first driver for souring a load current to a load; a second driver for sinking the load current from the load; a first operational amplifier (op-amp) coupled to a differential input signal for driving the first driver; a second operational amplifier coupled to the... Agent: North America Intellectual Property Corporation

20090295484 - Low bias current amplifier: An amplifier is provided that includes an output portion that sources and sinks current associated with an output load and an amplification portion that is biased by a relatively small bias current with respect to an output current of the amplifier. The amplification portion provides an amplified output signal to... Agent: Texas Instruments Incorporated

20090295483 - Rf power amplifiers with linearization: Designs and techniques associated with power amplifiers for amplifying RF signals to provide variable power amplification and improved linearity in various RF amplification circuits, including power amplifiers operated under the power back-off conditions.... Agent: Fish & Richardson, PC

20090295485 - Dynamically biasing class ab power amplifiers over a range of output power levels: A method and apparatus for dynamically biasing a class AB RF power amplifier (PA) over a range of output power levels. A memory 112 holds a table that maps a required output power to the PA from a set of bias point parameters that provide a substantially constant relative power... Agent: Motorola, Inc.

20090295486 - Operational amplifier having adjustable bias current and related source driver of display thereof: An operational amplifier includes an amplifying circuit and a bais current generating circuit. The bias current generating circuit generates a bias current to the amplifying circuit. The amplifying circuit comprises a current adjusting unit and a current mirror. The current adjusting circuit has a storage element, receives a reference current... Agent: North America Intellectual Property Corporation

20090295487 - Power efficient multistage amplifier and design method: A multistage amplifier and design method are disclosed. The multistage amplifier has a plurality of amplifier stages, each stage having an amplifier designed and biased to operate at or near the amplifier's power added efficiency (PAE) peak. The PAE peak of each of the amplifier is at or near the... Agent: Snell & Wilmer L.l.p (usm/viasat)