Amplifiers inventions 06/08

20080150628 - Low distortion class-d amplifier: An amplifier that receives an input signal and outputs an amplified output signal includes an integration stage, a comparison stage, and a full bridge circuit. The integration stage is be used for receiving a constant common mode voltage, for receiving a first signal representing the input signal of the amplifier,... Agent: Patent Prosecution O2mirco , Inc.

20080150629 - Traveling-wave tube turn-off body energy circuit: An apparatus that includes a traveling-wave tube having an electron gun having a cathode. The apparatus also includes a first power supply for establishing a first electric potential between the cathode and an anode and for providing an operational current to the cathode to generate a beam of electrons. The... Agent: Proskauer Rose LLP

20080150630 - Matching circuit and dual-band power amplifier: There is provided a matching circuit, in which a main-matching block and a sub-matching block are connected in series. The sub-matching block includes: a series matching block of which one end is connected to the main-matching block; and a parallel matching network connected to the other end of the series... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.c.

20080150631 - Biosignal amplifying device: A biosignal amplifying device includes: an operational amplifier (op-amp); a capacitor load including a first capacitor connected with a first input terminal of the op-amp, and in which a first voltage is inputted from a first electrode, and a second capacitor which is connected with a second input terminal of... Agent: Staas & Halsey LLP

20080150632 - Gigabit ethernet transceiver with analog front end: Circuitry to remove switches from signal paths in integrated circuit programmable gain attenuators. Programmable gain attenuators and programmable gain amplifiers commonly switch between signal levels using semi-conductor switches. Such switches may introduce non-linearities in the signal. By isolating the switches from the signal path linearity of the PGA can be... Agent: Mcandrews Held & Malloy, Ltd

20080150633 - Method and system for reducing am/pm distortion in a polar amplifier: Methods and systems for reducing AM/PM distortion in a polar amplifier are disclosed and may comprise adding an offset signal to an amplitude signal in the digital domain and removing the offset signal in the analog domain during polar modulation. A sum of an amplitude signal and an offset signal... Agent: Mcandrews Held & Malloy, Ltd

20080150635 - Class-d amplifier: A PWM modulator adds first and second input signals to each other, and performs PWM modulation processing for outputting a PWM-modulated pulse whose pulse width is modulated according to a result of addition. A shift register delays a bit stream acquired from a ΔΣ modulator, thereby generating two bit streams... Agent: Pillsbury Winthrop Shaw Pittman LLP

20080150634 - Two-stage amplification using intermediate non-linear square wave: A two-stage amplifier is provided, which in the first stage, a first amplifier generates a non-linear square wave based on a harmonic input. The non-linear square wave has the same frequency as the harmonic input and is provided as an input to the second stage, in which a second amplifier... Agent: Hoffman Warnick & D'alessandro, Llc

20080150636 - Differential amplifier with a plurality of input pairs: The present invention provides a differential amplifier with a plurality of input pairs. The differential amplifier not only includes a differential amplifier with a single input pair but also includes a pair of transistors and a current source to provide the input signals of an extra input pair. The pair... Agent: Jianq Chyun Intellectual Property Office

20080150637 - Electronics parts for high frequency power amplifier: This invention provides an electronic part for high frequency power amplification (RF power module) which will automatically perform the precharge level setting for proper output power at start of transmission without requiring the software process for precharging to run on the baseband IC, which can reduce the burden on users,... Agent: Mattingly, Stanger, Malur & Brundidge, P.c.

20080150638 - Constant margin cmos biasing circuit: A biasing circuit is presented. The biasing circuit includes a primary biasing circuit, a replica circuit and an amplifier. The primary circuit provides a biasing voltage and a primary voltage. The biasing voltage is the output of the biasing circuit. The replica biasing circuit provides a replica voltage. The replica... Agent: Texas Instruments Incorporated

20080150639 - Power amplification apparatus in communication system: Disclosed is a power amplification apparatus in a communication system. The apparatus includes a high power amplifier for amplifying an input signal; and a lattice panel, one surface of which is in contact with a ground plane of the high power amplifier, the one surface including a first line and... Agent: The Farrell Law Firm, P.c.

20080143436 - All-digital class-d audio amplifier: An all-digital class-D audio amplifier and method of digitizing an analog signal comprises a pulse-width modulation (PWM) wave generator for generating a PWM wave; an interpolator for receiving an input audio signal, up-sample the input audio signal; and down-sample the input audio signal to a PWM wave switching frequency; an... Agent: Gibb & Rahman, Llc

20080143437 - Method and apparatus for a nonlinear feedback control system: A method and apparatus for a nonlinear feedback control system is disclosed, such as for electrical and electronic systems, for pre-distorting a nonlinear device. A nonlinear feedback control system includes a nonlinear device having a first input and a first output. A detection stage is in communication with the first... Agent: Tyco Technology Resources

20080143438 - Amplifier device: An amplifier device has an amplifier circuit, an energy supply device, a switching matrix and a control device. A radio-frequency, low-energy signal pulse can be amplified into a high-energy power pulse by the amplifier circuit. The amplifier circuit is supplied with electrical energy by the energy supply device. The energy... Agent: Schiff Hardin, LLP Patent Department

20080143439 - Fully-differential amplifier: A fully-differential amplifier able to operate at a low power supply voltage and provided with a common-mode signal suppression function is disclosed. This fully-differential amplifier is provided with a first fully-differential amplifier configured by a single-stage configuration inverting amplifier and canceling out the common-mode signal of the input side by... Agent: Staas & Halsey LLP

20080143440 - Comparator having a preamplifier with power saved while latching data: In a comparator, a differential amplifier has a pair of transistors receiving a signal to be compared for differential amplification, and a current mirror load circuit for outputting a differential output signal in accordance with the relationship in magnitude of the signal to be compared. A latch circuit has inversion... Agent: Nixon Peabody, LLP

20080143441 - Amplifier having plurality of differential pairs and communication system equipped with same: A first differential pair and a second differential pair each receive differential input signals. The first differential pair and the second differential pair are connected such that the second differential pair receives part of a tail current of the first differential pair, and such that output signals of the first... Agent: Fish & Richardson P.c.

20080143442 - Electrical circuit: The present invention relates to a circuit for processing a signal and comprising an amplifier (20) having an input and an output. The circuit further comprises a first switching arrangement (S3, T3) and a second switching arrangement (S2, T2). The first switching arrangement being arranged between said input and ground... Agent: Ericsson Inc.

20080143443 - Vector modulator having attenuators with continuous input steering: Variable attenuation systems having continuous input steering may be used to implement vector or quadrature modulators and vector multipliers. Discrete implementations of attenuators with continuous input steering may have two outputs which may be cross-connected to provide four-quadrant operation. A symmetrically driven center tap may provide improved zero-point accuracy.... Agent: Marger Johnson & Mccollom, P.c.

20080143444 - Bias circuits and signal amplifier circuits: A bias circuit includes a transistor having a control gate, a first terminal and a second terminal coupled to a ground level, a first resistor coupled to the control gate, a first capacitor coupled between an input signal and the first resistor, a diode coupled between a connection point of... Agent: Joe Mckinney Muncy

20080143445 - Power amplifier: The present invention provides a power amplifier that includes the following: an RF operation transistor 3 having a base to which an RF signals is inputted, an emitter connected to the ground, and a collector connected to a power supply and a terminal for outputting an RF signal; a current... Agent: Hamre, Schumann, Mueller & Larson P.c.

20080136511 - Method and system for fast calibration to cancel phase feedthrough: Methods and systems for fast calibration to cancel phase feedthrough are disclosed and may comprise individually activating each of n binary-weighted cells utilizing a control signal in a power amplifier driver (PAD) and measuring the output signal, or offset, in response to a null signal applied to an input of... Agent: Mcandrews Held & Malloy, Ltd

20080136512 - Dual-mode, dual-load high efficiency rf power amplifier: A radio frequency (RF) amplifier has a driver device, an output device, and first and second impedance transformation networks. In a first operating mode the output device is turned on and the first impedance transformation network presents a first load impedance to the output device. In a second operating mode,... Agent: Kathy Manke Avago Technologies Limited

20080136513 - Power-efficient automatic gain control: A multi-stage amplifier configured for processing a received baseband signal comprises a plurality of fixed-gain amplifier stages and an automatic gain control (AGC) module. Each amplifier stage further comprises a switch and a bypass circuit. The AGC module is configured for controlling the switch for bypassing at least one of... Agent: Steven J Shattil

20080136514 - Rfic with on-chip multiple band power amplifiers: A radio frequency integrated circuit (RFIC) includes a silicon substrate, CMOS processing circuitry, and a bipolar power amplifier module. The CMOS processing circuitry is on the silicon substrate. The bipolar power amplifier module is on the silicon substrate and is operable in a 5 GHz frequency band.... Agent: Garlick Harrison & Markison

20080136515 - Method and system for enhancement of power amplifier efficiency through controlled variation of gain in a power amplifier driver: Aspects of a method and system for enhancement of power amplifier (PA) efficiency through controlled variation of gain in a power amplifier driver are presented. Aspects of the system may comprise an envelope detector that enables detection of an amplitude of an analog input signal. The envelope detector may enable... Agent: Mcandrews Held & Malloy, Ltd

20080136516 - Rfic with high power pa: A radio frequency (RF) front-end includes a plurality of power amplifier modules and a plurality of impedance matching circuits. Each of the plurality of impedance matching circuits includes an input connection and an output connection, wherein outputs of the plurality of power amplifier modules are coupled to corresponding input connections... Agent: Garlick Harrison & Markison

20080136518 - Feed-forward amplifier: There is provided a feed-forward amplifier which enables a predistortion circuit to obtain sufficient distortion compensation effects even if ambient temperature or the like changes. The feed-forward amplifier includes a variable attenuator for controlling the amount of attenuation of a signal input to a main amplifier, a variable attenuator for... Agent: Jacobson Holman Pllc

20080136517 - Method and apparatus for periodic noise suppression in transient signals: A system for cyclical noise removal from a transient signal is employed with a transient sensor for a signal. A signal conditioner is connected to the transient sensor for processing the signal. A transient digitizer captures the processed signal including capture of a sufficient period of time before the transient... Agent: Felix L. Fischer, Attorney At Law

20080136519 - Audio power amplifier: A smart protection circuit to prevent possible circuit malfunction or damage due to sudden power source voltage fluctuation is introduced. In case of quick and large voltage fluctuation in power supply, a control signal is activated to stop power transistor switching. When power supply is stable at a lower or... Agent: Greenblum & Bernstein, P.L.C

20080136522 - Amplifier with current mirror bias adjust: An amplifier includes a differential amplifier stage, a voltage amplification stage and a power output stage. The bias level of the output stage is proportional to current through the voltage amplification stage. The voltage amplification stage includes a current mirror whereby controlled current through a first leg of the current... Agent: James P. Hamley

20080136521 - Method and system for a low power fully differential noise cancelling low noise amplifier: Aspects of a method and system for a low power fully differential noise canceling low noise amplifier (NC LNA) are provided. The NC LNA may receive signals via a single ended input and may generate an amplified symmetric differential output from the received signals. The NC LNA may utilize capacitor... Agent: Mcandrews Held & Malloy, Ltd

20080136520 - Method and system for digitally controlling transmitter gain compensation: Methods and systems for digitally controlling transmitter gain compensation are disclosed. Aspects of one method may include applying an effective negative resistance to differential outputs of amplifying circuitry to compensate for gain changes that may be due to temperature changes. The effective negative resistance may be provided via a plurality... Agent: Mcandrews Held & Malloy, Ltd

20080136523 - Gain improved operational transconductance amplifier and control method thereof: A variable bias current is provided for the differential pair of an operational transconductance amplifier to improve the gain performance, especially to overcome the slew rate limit of the operational transconductance amplifier. The bias current is adjusted according to the differential input to the differential pair, the difference between the... Agent: Rosenberg, Klein & Lee

20080136524 - Amplifier circuit, semiconductor device, and controlling method: An amplifier circuit including a plurality of CMOS (Complementary Metal Oxide Semiconductor) inverter circuits connected in parallel with each other. The CMOS inverter circuits each include a first PMOS (P-channel Metal Oxide Semiconductor) transistor, a first NMOS (N-channel Metal Oxide Semiconductor) transistor, gates of the first PMOS and NMOS transistors,... Agent: Robert J. Depke Lewis T. Steadman

20080136525 - Current pre-amplifier and associated current comparator:

20080136527 - High impedance circuit: A signal amplifier circuit comprises a signal amplifier having an input for receiving an ac signal to be amplified and an amplifier biasing arrangement coupled between the signal input and a dc voltage line, the arrangement comprising a diode means and a bootstrapping amplifier connected across the diode means.... Agent: Nixon & Vanderhye, Pc

20080136526 - Method and system for a highly efficient power amplifier utilizing dynamic biasing and predistortion: Aspects of a method and system for a highly efficient power amplifier (PA) utilizing dynamic biasing and predistortion are presented. Aspects of the system may include a processor that enables computation of a value of a variable bias component of a bias current based on a bias slope value and... Agent: Mcandrews Held & Malloy, Ltd

20080136528 - Merged low-noise amplifier and balun: An RF amplifier can include a differential inductor for single-ended-to-differential signal conversion. With a center tap of the differential inductor coupled to signal ground and the RF input signal coupled to one of the end taps of the inductor, the negative of the RF input signal is obtained at the... Agent: Potomac Patent Group Pllc

20080136529 - Power amplifier with nonlinear compensation, and method thereof: A power amplifier amplifying an input signal is provided, comprising a power amplifier circuit, a bias circuit, and a compensation circuit. The power amplifier circuit has an input impedance responsive to the input signal, and amplifies the input signal to generate an output signal. The bias circuit is coupled to... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080136530 - Power broadband amplifier: A circuit for broadband amplification is provided. The circuit includes an input HF_IN and an output HF_OUT, a first 90° hybrid coupler being connected to the input HF_IN of the circuit and a second 90° hybrid coupler being connected to the output HF_OUT of the circuit, and two amplifier stages... Agent: Crowell & Moring LLP Intellectual Property Group

20080129374 - Optimized uplink efficiencies for transmission of satellite data: Systems and methods for characterizing amplifiers. A system for characterizing an amplifier in accordance with the present invention comprises a Gaussian signal source for generating a signal in the frequency domain, a notch filter, coupled to the Gaussian Noise source, wherein the notch filter has a notch at a specified... Agent: The Directv Group, Inc. Patent Docket Administration

20080129376 - All digital class-d modulator and its saturation protection techniques: Methods and systems for modulating an input electrical signal are disclosed herein. Aspects of the method may comprise modulating analog input signals utilizing a digital Class-D modulator and generating a digital output signal that is proportional to the analog input signals. The digital Class-D modulator may be comprised of four... Agent: Mcandrews Held & Malloy, Ltd

20080129375 - Power supply compensation: The invention relates to an amplifier comprising amplification means (AM) comprising an input and an output, said amplification means (AM) comprising a switching output stage delivering at least one output signal (OUS) via said output, said amplification means being fed by power supply means (PSM) said amplifier further comprising compensation... Agent: Cantor Colburn, LLP

20080129377 - Voltage regulator with current sink for diverting external current and digital amplifier including the same: A voltage regulator includes a voltage driving circuit and a current sinking unit. The voltage driving circuit is controlled to maintain an output signal at an output node. The current sinking unit is coupled to the output node for generating a sinking current for diverting an external current to the... Agent: Law Office Of Monica H Choi

20080129378 - Detector for automatic gain control: Provided is a detector for automatic gain control (AGC). The detector for AGC is used for a variable gain amplifier (VGA) including at least one VGA cell. The detector for AGC includes: first and second transistors having sources connected in common to a power supply voltage and drains connected in... Agent: Ladas & Parry LLP

20080129379 - System and method for digitally correcting a non-linear element: System and methods for a digital linearization of a non-linear element. Preferred embodiments provide digital predistortion methods and circuitry that addresses long or “memory” effects and separately shorter duration effects, these two predistortion functions are operated together in an adaptive fashion with a non-linear element to provide a highly linear... Agent: Texas Instruments Incorporated

20080129380 - Constant current darlington circuits for high power: Disclosed herein is a high-power constant current Darlington circuit, including an input terminal in which the base terminal (B) (a first terminal) of the constant current Darlington circuit is connected to the base of a transistor (Q1), the emitter of the transistor (Q1) being connected to one end of a... Agent: Dickstein Shapiro LLP

20080129381 - Digital amplifying apparatus: A digital amplifying apparatus includes a positive-phase amplifier, an inverting amplifier, a pair of LPFs, a positive and a negative noise component extracting unit, and noise component coupling units that couple a negative and a positive noise component extracted by the negative and the positive noise component extracting units with... Agent: Young & Thompson

20080129382 - High efficiency digital power amplifier: A digital power amplifier (or power switching amplifier or power switch) for use in a digital transmitter includes a low impedance multi-stage driver circuit having a low impedance pre-driver and a low impedance driver. The drive circuit drives a power switch stage having two power transistors configured in a current... Agent: Docket Clerk

20080129383 - Differential amplifier circuit: A differential amplifier circuit includes a first transistor in which an electrode on one side is connected to a first constant current source, an electrode on the other side is connected to a second constant current source, and the control electrode is applied with a first input voltage; a second... Agent: Socal Ip Law Group LLP

20080129384 - Variable gain amplifier circuit: A variable-gain amplifier circuit capable of eliminating circuit elements and the area for circuits when formed into an integrated circuit is disclosed. The circuit includes plural differential circuits, one of the input terminals of each of the differential circuits being connected in common to a signal input terminal, any one... Agent: Ladas & Parry LLP

20080129385 - High-frequency amplification circuit: A resonance circuit comprising, for example, an inductor and a plurality of capacitors is provided as a load of a transistor. The capacitors are changed over by a switch. As the capacitors are changed over by the switch, a resonance frequency is changed according to the invention the frequency hopping... Agent: Sughrue Mion, Pllc

20080129386 - Radio frequency modulator and methods thereof: An attenuation level may be set once per a command to set an average output power of output signals of a power amplifier, and outphased modulated signals may be attenuating according to the attenuation level prior to amplification of the signals by a power amplifier. An outphasing modulator may include... Agent: Pearl Cohen Zedek Latzer, LLP

20080129387 - Amplifier: An amplifier includes: a single-stage or multiple-stage variable gain amplifier that amplifies an input signal with a controlled gain; a AGC control circuit that detects the peak level of a signal outputted from the variable gain amplifier in the final stage, converts the resultant signal to a digital signal, and... Agent: Hamre, Schumann, Mueller & Larson P.c.