Amplifiers inventions 12/06

20060290420 - Wide dynamic range switching variable gain amplifier and control: A plurality of variable gain amplifier stages are coupled by an attenuation circuit that receives a voltage input to be amplified. A control circuit activates each of the variable gain amplifier stages in a seamless manner in accordance with a control signal applied to a voltage control node, while maintaining... Agent: Mcdermott Will & Emery LLP

20060290421 - Multi-substrate rf module for wireless communication devices: A radio frequency (RF) module includes a first substrate adapted to receive passive circuits; and a second substrate adapted to receive active circuits, the first and second substrates electrically coupled through pads positioned on opposing surfaces of the first and second substrate.... Agent: Bao Tran Tran & Associates

20060290422 - Variable feedback circuits and methods: In one embodiment, the present invention includes a circuit comprising an amplifier having an input terminal, an output terminal, a positive supply voltage, and a negative supply voltage. The amplifier is configured to have a first gain. A variable feedback circuit is coupled between the input terminal and the output... Agent: Chad R. Walsh Fountainhead Law Group

20060290423 - Systems of miniaturized compatible radio frequency wireless devices: A system of compatible modules includes a radio frequency (RF) module with a power amplifier configured to produce an amplified RF signal at an output RF terminal; and a first row of pads and a first column of pads intersecting at a corner pad of the module, and wherein the... Agent: Tran & Associates

20060290424 - Linear power efficient radio frequency (rf) driver system and method with power level control: A linear power efficient radio frequency (RF) driver system (100) includes a pre-driver amplifier (105) for amplifying an RF signal; and an output driver (107) having a substantially high impedance input for amplifying the signal from the pre-driver amplifier (105). A bias controller (109) is used for controlling the RF... Agent: Motorola, Inc Intellectual Property Section

20060290425 - Isolated conversion apparatus for analog signal: An isolated conversion apparatus for analog signal includes a filer, an amplification circuit, an isolation circuit, and a voltage follower. The amplifier includes a switch unit to select an input current signal or an input voltage signal. Alternatively, a large input current signal can be converted to a voltage signal... Agent: Hdsl

20060290426 - High performance differential amplifiers with thick oxide devices for high impedance nodes: A circuit is described which uses a thick gate oxide device in the input stage and a thin gate oxide device in a second stage that is connected to the input stage. The input stage thick gate oxide device provides a low input gate leakage current. The thin gate oxide... Agent: Priest & Goldstein, PLLC

20060290427 - Low voltage operational amplifier: An operational amplifier includes a differential amplifier for amplifying differential input signals to generate differential amplified signals. The operational amplifier also includes first and second single-ended amplifiers that each amplify the differential amplified signals to respectively generate first and second single-ended output signals that are differential with respect to each-other.... Agent: Law Office Of Monica H Choi

20060290428 - Variable gain amplifier with temperature compensation and gain linearity enhancement: A variable gain amplifier contains a plurality of differential transistor pairs. A temperature dependent current is generated in the current path of each differential transistor pair. A generated gain control current is converted to a temperature dependent gain control current and applied in circuit with control inputs of the transistors... Agent: Mcdermott Will & Emery LLP

20060290429 - Composition form forming anti-reflective coating for use in lithography: There is provided a composition for forming anti-reflective coating for anti-reflective coating that has a good absorption of light at a wavelength utilized for manufacturing a semiconductor device, that exerts a high protection effect against light reflection, that has a high dry etching rate compared with the photoresist layer. Concretely,... Agent: Oliff & Berridge, PLC

20060290430 - Receiving amplifier, in particular for television receivers, and use of the receiving amplifier: A receiving amplifier includes a semiconductor body with a first node, a second node and an amplifier circuit. The amplifier includes at least one field-effect transistor, a first input, and a second input. A capacitive element is arranged between the inputs of the amplifier circuit, and a tuned circuit whose... Agent: Eschweiler & Associates, LLC National City Bank Building

20060290431 - Semiconductor device: Power amplifier circuits which constitute an RF power module used for a digital device capable of handling high frequency signals in two frequency bands are disposed over the same IC chip. The power amplifier circuits are disposed around the IC chip, and a secondary circuit is disposed between the power... Agent: Reed Smith LLP

20060290432 - Direct current offset canceling circuit of trans-impedance amplifier and automatic gain control trans-impedance amplifier thereof: A direct current (DC) offset canceling circuit of a trans-impedance amplifier and an automatic gain control trans-impedance amplifier is provided, including: a trans-impedance amplifier for receiving an input current and converting the input current into a first voltage signal, while the trans-impedance amplifier is provided with a plurality of inverters... Agent: Harness, Dickey & Pierce, P.L.C

20060284671 - Variable gain amplifier circuit, method of correcting dc offset of the variable gain amplifying circuit, and radio receiving apparatus: A variable gain amplifier circuit according to an embodiment of the invention includes: an output offset correcting unit for executing correction to attenuate a fixed offset component independent of a gain change of a variable gain amplifier circuit out of a DC offset involved in an output voltage of an... Agent: Sughrue Mion, PLLC

20060284673 - Amplifier having half-wave tracking power rails: An amplifier adapted to generate an analog output signal in response to a digital input signal and having an output stage powered by a power-supply circuit, which generates one or more power rails for the output stage such that at least one of these power rails tracks the output signal... Agent: Mendelsohn & Associates, P.C.

20060284672 - Control circuit and method for a switching amplifier: In a control circuit and method for a high efficiency and low EMI switching amplifier, an input signal is compared with a reference signal to generate a comparison signal, and a control signal is generated in response to the comparison signal for a driver to generate an output signal. The... Agent: Rosenberg, Klein & Lee

20060284674 - Regulator: A regulator includes a digital voltage detection unit for generating a digital voltage detection signal by detecting a digital value of a voltage level of an input voltage; a variable gain amplifying unit for amplifying the input voltage in an amplifying ratio according to a gain control signal; and a... Agent: Morgan Lewis & Bockius LLP

20060284675 - Variable distortion limiter using clip detect predictor: A system and method for predicting and limiting distortion of an amplified signal is described. The system includes a variable total harmonic distortion (“THD”) clipping predictor, a comparator in communication with the variable THD clipping predictor and a distortion limiter in communication with the comparator. As for the method, a... Agent: Visteon

20060284676 - Circuit for changing a frequency: A circuit is provided for multiplying a frequency by a cascade formed of a transadmittance having a transfer characteristic and a transimpedance having a transfer characteristic. The transadmittance includes two terminals for a signal of a first frequency and the transimpedance includes two terminals for a signal of a second... Agent: Mcgrath, Geissler, Olds & Richardson, PLLC

20060284677 - Switching amplifier and control method thereof: In a switching amplifier for generating a pair of output signals of square waves in response to an input signal, when the input signal is zero, the first output signal has a first duty cycle and the second output signal has a second duty cycle; when the input signal is... Agent: Rosenberg, Klein & Lee

20060284678 - Flip around switched capacitor amplifier: A flip around amplifier circuit is provided that includes an amplifier having first and second amplification stages, a Miller capacitor, and a resistive element in series with the Miller capacitor, where an output line of the second amplification stage can be coupled to an output line of the first amplification... Agent: Wolf Greenfield & Sacks, PC

20060284679 - Integrated circuit having a low power, gain-enhanced, low noise amplifying circuit: An amplifying circuit includes an n-type transistor having a source, a gate coupled to a first bias voltage, and a drain coupled to a first supply voltage through a first impedance circuit. A p-type transistor of the circuit has a source coupled to the source of the n-type transistor, a... Agent: John J. Oskorep, Esq. One Magnificent Mile Center

20060284680 - Amplifier arrangement and amplifying method: In one embodiment, an amplifier arrangement includes an amplifier having a first input, a second input and an output, a first resistor network, having a first parallel circuit formed by a first number N of resistors, and a second resistor network, having a first resistor or a second parallel circuit... Agent: Eschweiler & Associates, LLC National City Bank Building

20060284681 - Wide bandwidth attenuator input circuit for a measurement probe: A wide bandwidth attenuator input circuit for a measurement probe has a Z0 attenuator circuit coupled in series with a compensated RC attenuator circuit. The series attenuator elements of the Z0 and the compensated RC attenuator circuits are coupled via a controlled impedance transmission line to the shunt attenuator elements... Agent: William K. Bucher Tektronix, Inc.

20060284682 - High efficiency power amplifier: A high efficiency power amplifier with a precise duty cycle is provided for use in a driver or pre-power amplifier of a Radio Frequency (RF) system. The high efficiency power amplifier with an inverter configured by one pair of Metal Oxide Semiconductor (MOS) transistors includes a feedback path for adjusting... Agent: Dilworth & Barrese, LLP

20060284683 - Electro-optical device, driving method, and electronic apparatus: An electro-optical device includes: a plurality of scanning lines; a plurality of data lines blocked for every “m” (m is an integer of 2 or greater) columns; pixels provided corresponding to the scanning lines and the data lines and showing grayscale specified by data signals sampled to data lines when... Agent: Oliff & Berridge, PLC

20060284684 - Temperature compensated voltage regulator integrated with mmic's: A voltage regulator integrated with a monolithic microwave integrated circuit (MMIC) power amplifier that supplies a regulated bias current to the MMIC power amplifier that is compensated for temperature and voltage supply variations. The regulator circuit includes HBT transistors for current mirrors and a voltage regulator where a base-emitter voltage... Agent: Cesari And Mckenna, LLP

20060284685 - Power amplifier of a transmitter: A power amplifier integrated into an RF-IC (integrated circuit carrying radio frequency signals) comprises an active stage (350) and a passive stage (360), the passive stage being electrically coupled between the active stage and a load of the power amplifier. Electrically conductive elements (305) accomplishing an electrical connection between the... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20060279353 - Chopper stabilized amplifier without dc output ripple: The chopper stabilized amplifier circuit includes: an amplifier; a first current mirror coupled to an output of the amplifier through a first switch; a second current mirror coupled to the output of the amplifier through a second switch, wherein the first switch is operated out of phase with the second... Agent: Texas Instruments Incorporated

20060279355 - Digital-to-analog converter: A converter of a digital signal into a pulse-width modulated signal, comprising a first conversion unit receiving, at a first frequency, successive digital signals each having one of a first determined number of values, and providing first intermediary signals, at the first frequency, each having one of a second determined... Agent: Plevy & Howard, P.C.

20060279354 - Reduction of audible artifacts in an audio system: An audio system includes a switch mode amplifier that provides an output signal at an output for driving a load based on at least one control signal. A control system provides the at least one control signal to control the amplifier according to an operating mode of the audio system.... Agent: Texas Instruments Incorporated

20060279356 - Source driver controlling slew rate: A source driver employed in a liquid crystal display device uses a slew-rate control signal to regulate a slew rate of its output buffers, which makes an output voltage selectively operable at a low slew rate. Such a source driver can reduce (if not prevent) distortion of a common voltage.... Agent: Harness, Dickey & Pierce, P.L.C

20060279357 - Low distortion class-d amplifier using sampling of a servo-loop amplifier output: An electronic class-D amplifier including a pulse width modulator and a servo-loop amplifier characterised in that there is provided a sample and hold element which samples a signal at the sample input when a sample command signal is applied to a control input, and holds the value of the last... Agent: Osha Liang L.L.P.

20060279358 - Electronic device and method for manufacturing linear antenna thereof: An electronic device and a method for manufacturing a linear antenna thereof are provided. The electronic device includes a casing, several guiding bosses, a circuit board and a linear antenna. The casing has an inner wall. The guiding bosses are disposed on the inner wall. The circuit board is disposed... Agent: Rabin & Berdo, PC

20060279359 - High-frequency power amplifier circuit and electronic part for communication: A wireless communication system has a first operation mode (GSM mode) for amplifying a phase-modulated high frequency signal with a high frequency power amplifier circuit and a second operation mode (EDGE mode) for amplifying a phase and amplitude-modulated high frequency signal with the amplifier circuit. The amplifier circuit has an... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20060279360 - Distributed amplifier: In order to allow to make compact a distributed amplifier by dispensing with any choke coil and reduce its cost, the distributed amplifier is configured such that it comprises an input side transmission line, an output side transmission line, and plural amplifier circuits connected to the input side transmission line... Agent: Arent Fox PLLC

20060279361 - Power amplifier having high heat dissipation: A power amplifier includes a substrate, a heat sink for dissipating heat, and a heterojunction bipolar transistor (HBT) disposed on the substrate. The HBT includes a collector, a base, and at least an emitter. The power amplifier further includes an emitter electrode directly connecting the heat sink and the emitter... Agent: North America Intellectual Property Corporation

20060279362 - Concurrent triple-band gain amplifier for multi-standard coexist communications: The present invention discloses a gain amplifier, capable of concurrently operating at three different frequency bands. The gain amplifier comprises an amplification stage for amplifying a signal applied to an input of the amplifier and a triple-band resonance load connected between a DC bias voltage and a DC bias input... Agent: Michael D. Bednarek Shawpittman LLP

20060273849 - Operational amplifier circuit having adjustable bias current: An operational amplifier circuit includes an operational amplifier, a bias current provider, and a control circuitry. The operational amplifier drives a load according to an input signal. The bias current provider is coupled to the operational amplifier and provides a bias current to the operational amplifier. The control circuitry is... Agent: North America Intellectual Property Corporation

20060273850 - Operational amplifier circuit with controllable intermediate circuitry set therein: An operational amplifier circuit includes an operational amplifier, an intermediate circuitry, and a control circuitry. The intermediate circuitry is coupled to a load. The operational amplifier is coupled to the intermediate circuitry and drives the load through the intermediate circuitry according to an input signal. The control circuitry is coupled... Agent: North America Intellectual Property Corporation

20060273851 - Method and apparatus for low-frequency bypass in broadband rf circuitry: A method of processing an input broadband signal in RF circuitry includes extracting low-frequency components from the input broadband signal, processing the low-frequency components in low-frequency bypass circuitry, and adding the processed low-frequency components to the output of the RF circuitry to produce a combined output signal. Low-frequency bypass amplifier... Agent: Mark G. Lappin, P.C. Mcdermott Will & Emery LLP

20060273852 - Amplifiers: A class E amplifier circuit comprises a first class E amplifier connected to receive a first signal and operable to amplify the first signal and to output such an amplified first signal and a second class E amplifier connected to receive a second signal related to the first signal, and... Agent: Welsh & Katz, Ltd

20060273854 - Band selection type feed forward amplifier: The feed forward amplifier of the present invention comprises a distortion detection circuit and a distortion elimination circuit and has n first vector adjusters 4 which have different operating frequency bands and are inserted in a first vector adjustment path 14 of the distortion detection circuit; and n second vector... Agent: C. Irvin Mcclelland Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20060273853 - Feed forward amplifier for multiple frequency bands: The feed forward amplifier of the present invention comprises a distortion detection circuit and a distortion elimination circuit and has first and second variable frequency band extractors 25a and 25b provided in series with respective vector adjustment paths 21a and 21b. Also, the feed forward amplifier comprises a frequency band... Agent: C. Irvin Mcclelland Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20060273855 - Noise sensitive volume control device, audio device and noise sensitive volume control method: Noise information is acquired by a noise detecting microphone 2, speed information is acquired by a speed sensor 1 etc, and these items of information are inputted to a microcomputer 7. The microcomputer 7 reads a program 13 stored in a memory 8, and calculates a final correction quantity according... Agent: Oliff & Berridge, PLC

20060273856 - Operation amplifier circuit having digital driving circuitry and analog driving circuitry: An operational amplifier circuit includes an analog driving circuitry and a digital driving circuitry. The analog driving circuitry is coupled to a load and drives the load according to an input signal. The digital driving circuitry includes a code comparator, a sourcing unit, and a sinking unit. The code comparator... Agent: North America Intellectual Property Corporation

20060273857 - Variable-gain amplifier with high linearity as to gain variations: A variable-gain amplifier includes an amplifier stage; an attenuating network receiving an input signal; a plurality of transconductance stages, connected between respective nodes of the attenuating network and the amplifier stage, wherein each of the transconductance stages has a differential circuit, configured to supply differential currents to the amplifier stage;... Agent: Stmicroelectronics Inc. C/o Wolf, Greenfield & Sacks, PC

20060273858 - Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver: In one embodiment, a method is provided for reducing output current oscillations of a driver provided with i) a current sensing circuit that senses excessive current draws of an output stage of the driver, and ii) a feedback control circuit that reduces the excessive current draws. In accordance with the... Agent: Agilent Technologies Inc.