Amplifiers inventions 10/08

20080258809 - Amplifier device capable of reducing offset voltage: An amplifier device capable of reducing offset voltage includes an offset-voltage cancellation device, an input stage circuit, an output stage circuit, a pseudo output stage circuit, a switch circuit, and an output end. The switch circuit is coupled to the input stage circuit, the output stage circuit, and the pseudo... Agent: North America Intellectual Property Corporation

20080258810 - Method and apparatus for optimizing current consumption of amplifiers with power control: Apparatus and method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), according to which the load, connected to the output stage of the PA, tuned dynamically or statically for each level of the desired output power. By doing so, the output impedance of... Agent: Marsteller & Associates

20080258811 - Distributed class g type amplifier switching method: An improved Class G type amplifier is provided which switches between multiple power rails depending upon the instantaneous amplitude of the input signal versus the power rails without excessive distortion. The low voltage (inner) amplifier includes a plurality of parallel amplifier devices, and the high voltage (outer) amplifier includes a... Agent: Townsend And Townsend And Crew, LLP

20080258812 - High speed differential receiver with rail to rail common mode operation having a symmetrical differential output signal with low skew: A novel high-speed differential receiver (100) is disclosed that provides a new method and apparatus receiving and amplifying a small differential voltage with a rail-to-rail common mode voltage. The receiver output signals are differential signals with low skew and high symmetry. This high-speed differential receiver (100) is based on a... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080258813 - Sense amplifiers operated under hamming distance methodology: A semiconductor device includes a first sense amplifier coupled to an input for generating a first output; a second sense amplifier couple to the input for generating a second output; and a third sense amplifier coupled to the input for generating a third output, wherein a fourth output amplifying the... Agent: K & L Gates LLP

20080258814 - Variable gain amplifier and method for achieving variable gain amplification with high bandwidth and linearity: Various example embodiments are disclosed. According to one example embodiment, a high bandwidth, fine granularity variable gain amplifier (“VGA”) may comprise an attenuator, a gain block and a gain adjustment control. The attenuator may comprise at least one pair of attenuator differential input nodes and at least one pair of... Agent: Brake Hughes Bellermann LLP C/o Intellevate

20080258815 - High frequency power amplifier and wireless portable terminal using the same: An object is to provide a high frequency power amplifier in which lowering of output power during operation is prevented, influence of thermal noise is suppressed, high frequency operation is stable, and long-term reliability is ensured. The high frequency power amplifier includes a plurality of transistors having gate electrodes, source... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080258816 - Low frequency analog circuit and design method thereof: A low frequency analog circuit and a method for designing the same are provided. In a low frequency analog circuit according to the present invention, a part of MOS transistors employed in the circuit are operated at a weak inversion region.... Agent: Jianq Chyun Intellectual Property Office

20080258817 - Hybrid concurrent and switched dual-band low noise amplifier: The present invention provides a system and method for operating hybrid concurrent and switched dual-band low noise amplifiers. Embodiments use a concurrent design at the input block of a hybrid LNA to advantageously achieve better impedance matching while using a switch capacitor design at the output block to advantageously achieve... Agent: Townsend And Townsend And Crew, LLP

20080258818 - Amplifier with progammable input impedance: One embodiment of the invention includes an amplifier system. The amplifier system comprises an amplifier stage configured to receive an input signal at an amplifier input and to provide an amplified output signal. The amplifier system also comprises a programmable input impedance stage comprising a plurality of transconductance stages. At... Agent: Texas Instruments Incorporated

20080258820 - Active circuit having improved linearity using mulitiple gated transistor: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate... Agent: Foley And Lardner LLP Suite 500

20080258819 - Active circuit having improved linearity using multiple gated transistor: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate... Agent: Foley And Lardner LLP Suite 500

20080258821 - Cmos triple-band rf vga and power amplifier in linear transmitter: Methods and systems for amplifying signals are provided. Embodiments include a three-to-one multiplexer, a multiband RF variable gain amplifier (VGA), a multiband power amplifier driver (PAD), and a one-to three multiplexer. The three-to-one multiplexer receives three input signals from an RF frequency source and outputs an output signal corresponding one... Agent: Townsend And Townsend And Crew, LLP

20080258809 - Amplifier device capable of reducing offset voltage: An amplifier device capable of reducing offset voltage includes an offset-voltage cancellation device, an input stage circuit, an output stage circuit, a pseudo output stage circuit, a switch circuit, and an output end. The switch circuit is coupled to the input stage circuit, the output stage circuit, and the pseudo... Agent: North America Intellectual Property Corporation

20080258810 - Method and apparatus for optimizing current consumption of amplifiers with power control: Apparatus and method for reducing the current consumption and increasing the efficiency of an RF power amplifier (PA), according to which the load, connected to the output stage of the PA, tuned dynamically or statically for each level of the desired output power. By doing so, the output impedance of... Agent: Marsteller & Associates

20080258811 - Distributed class g type amplifier switching method: An improved Class G type amplifier is provided which switches between multiple power rails depending upon the instantaneous amplitude of the input signal versus the power rails without excessive distortion. The low voltage (inner) amplifier includes a plurality of parallel amplifier devices, and the high voltage (outer) amplifier includes a... Agent: Townsend And Townsend And Crew, LLP

20080258812 - High speed differential receiver with rail to rail common mode operation having a symmetrical differential output signal with low skew: A novel high-speed differential receiver (100) is disclosed that provides a new method and apparatus receiving and amplifying a small differential voltage with a rail-to-rail common mode voltage. The receiver output signals are differential signals with low skew and high symmetry. This high-speed differential receiver (100) is based on a... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080258813 - Sense amplifiers operated under hamming distance methodology: A semiconductor device includes a first sense amplifier coupled to an input for generating a first output; a second sense amplifier couple to the input for generating a second output; and a third sense amplifier coupled to the input for generating a third output, wherein a fourth output amplifying the... Agent: K & L Gates LLP

20080258814 - Variable gain amplifier and method for achieving variable gain amplification with high bandwidth and linearity: Various example embodiments are disclosed. According to one example embodiment, a high bandwidth, fine granularity variable gain amplifier (“VGA”) may comprise an attenuator, a gain block and a gain adjustment control. The attenuator may comprise at least one pair of attenuator differential input nodes and at least one pair of... Agent: Brake Hughes Bellermann LLP C/o Intellevate

20080258815 - High frequency power amplifier and wireless portable terminal using the same: An object is to provide a high frequency power amplifier in which lowering of output power during operation is prevented, influence of thermal noise is suppressed, high frequency operation is stable, and long-term reliability is ensured. The high frequency power amplifier includes a plurality of transistors having gate electrodes, source... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080258816 - Low frequency analog circuit and design method thereof: A low frequency analog circuit and a method for designing the same are provided. In a low frequency analog circuit according to the present invention, a part of MOS transistors employed in the circuit are operated at a weak inversion region.... Agent: Jianq Chyun Intellectual Property Office

20080258817 - Hybrid concurrent and switched dual-band low noise amplifier: The present invention provides a system and method for operating hybrid concurrent and switched dual-band low noise amplifiers. Embodiments use a concurrent design at the input block of a hybrid LNA to advantageously achieve better impedance matching while using a switch capacitor design at the output block to advantageously achieve... Agent: Townsend And Townsend And Crew, LLP

20080258818 - Amplifier with progammable input impedance: One embodiment of the invention includes an amplifier system. The amplifier system comprises an amplifier stage configured to receive an input signal at an amplifier input and to provide an amplified output signal. The amplifier system also comprises a programmable input impedance stage comprising a plurality of transconductance stages. At... Agent: Texas Instruments Incorporated

20080258820 - Active circuit having improved linearity using mulitiple gated transistor: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate... Agent: Foley And Lardner LLP Suite 500

20080258819 - Active circuit having improved linearity using multiple gated transistor: The present invention relates to improved linearity of an active circuit, and more particularly, to an active circuit having improved linearity using a main circuit unit and an assistant circuit unit. According to the present invention, the common gate circuit includes a main circuit unit consisting of a common gate... Agent: Foley And Lardner LLP Suite 500

20080258821 - Cmos triple-band rf vga and power amplifier in linear transmitter: Methods and systems for amplifying signals are provided. Embodiments include a three-to-one multiplexer, a multiband RF variable gain amplifier (VGA), a multiband power amplifier driver (PAD), and a one-to three multiplexer. The three-to-one multiplexer receives three input signals from an RF frequency source and outputs an output signal corresponding one... Agent: Townsend And Townsend And Crew, LLP

20080252370 - Digital audio amplifier and digital audio amplifying method therefor: A digital audio signal amplifier and a digital audio signal amplifying method therefor are provided. More particularly, a digital audio signal amplifier in which both safety and power efficiency are achieved by integrating a switching mode power supply and a digital audio amplifier into one, and a digital audio signal... Agent: Stanzione & Kim, LLP

20080252369 - Operational amplifier, line driver, and liquid crystal display device: An operational amplifier capable of offset cancel in a shorter period, as well as a line driver capable of shortening one horizontal period and a liquid crystal display device are provided. In the operational amplifier of the invention, a time necessary for feed back control can be shortened than usual... Agent: Arent Fox LLP

20080252371 - Feedforward amplifier: There is disclosed a feedforward amplifier for compensating for distortion produced in an amplifier. The feedforward amplifier controls the phase in a vector adjuster effectively. The feedforward amplifier has a first variable phase shifter PH1—1 or PH2—1 for varying the phase of a signal passed through the first variable phase... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20080252372 - Power-mosfets with improved efficiency for multi-channel class-d audio amplifiers and packaging thereof: A stereo class-D audio system includes a first die including four monolithically integrated NMOS high-side devices and a second a second die including four monolithically integrated PMOS low-side devices. The audio system also includes a set of electrical contacts for connecting the high and low-side devices to components within the... Agent: Advanced Analogic Technologies

20080252373 - Low flicker noise operational amplifier: A low flicker noise operational amplifier comprises two circuit branches of the same topology and a plurality of current source pairs. For each current source pair, the two current sources are commutatively steered into the two circuit branches via two sets of differential pair in a manner controlled by a... Agent: Ipr Works, LLC

20080252374 - Amplifier and system utilizing the same: An amplifier structure is disclosed. The amplifier comprises a voltage source, a first amplifying unit and a second amplifying unit. The first amplifying unit is coupled to the voltage source to amplify a first input signal and a second input signal to generate a first amplified signal according to a... Agent: Joe Mckinney Muncy

20080252375 - Voltage-clamping device and operational amplifier and design method thereof: A voltage-clamping device used in an operational amplifier is provided. The operational amplifier comprises a first transistor. The cross-voltage between the gate and the source of the first transistor is near to a specific voltage and the cross-voltage between the drain and the source of the first transistor is not... Agent: Rabin & Berdo, PC

20080252376 - Metal-oxide-semiconductor circuit designs and methods for operating same: Complimentary Metal-Oxide-Semiconductor (CMOS) circuits made with core transistors are capable of reliable operation from an IO power supply with voltage that exceeds the reliability limit of the transistors. In embodiments, biasing of an operational amplifier is changed in part to a fixed voltage corresponding to the reliability limit. In embodiments,... Agent: Qualcomm Incorporated

20080252377 - Low noise amplifier having improved linearity: Embodiments of the present general inventive concept include a low noise amplifier and method with an improved linearity while reducing a noise disadvantage (e.g., increase). One embodiment of a low noise amplifier can include a first transistor to receive an input signal at a control terminal thereof, a second transistor... Agent: Rene A. Vazquez Williams Mullen

20080252378 - 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

20080252379 - High slew rate amplifier, analog-to digital converter using same, cmos imager using the analog-to-digital converter and related methods: An amplifier, which may be used in a pipelined analog-to-digital converter, includes a first amplifier stage driving a second amplifier stage. At least one compensation capacitor is coupled to provide negative feedback through the capacitor from the second amplifier stage to the first amplifier stage. The slew rate of the... Agent: Dorsey & Whitney LLP Intellectual Property Department

20080252380 - Power supply system: A power supply system comprises a parallel arrangement of a linear amplifier (LA) and a DC-DC converter (CO). An output of the linear amplifier (LA) is directly coupled to a load (LO) for supplying a first current (II) to the load (LO). The DC-DC converter (CO) has a converter output... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080252381 - Transformer circuit: A BALUN circuit (20) for low voltage operation for receiving single ended input signal at an input terminal (24) and providing a differential output signal across a pair of output terminals (OUT+, OUT−) is disclosed. The BALUN circuit (20) comprises a first branch including an input terminal (24) for receiving... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080252382 - Class-f power amplifier circuit: An FET outputs a signal including a component of angular frequency ωo of input signal and harmonic components, a first two-terminal reactance circuit interconnects an output terminal and a ground terminal of the FET, a fundamental matching circuit is connected to an output terminal end of the FET, a second... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080246542 - Amplifier for a radio frequency transmitter for transmitting a transmit signal to an otological apparatus: There is described an amplifier for a radio frequency signal for transmitting a transmit signal to an otological apparatus. The amplifier comprises at least one power transistor for switching an output signal. A breaker gap of the power transistor is actively connected to a network such that a power loss... Agent: Siemens Corporation Intellectual Property Department

20080246543 - Common mode feedback for large output swing and low differential error: A differential amplifier includes a differential input pair (2A) coupled to a folded cascode stage (2B) and a common mode feedback circuit (34) including a tracking circuit (30A) coupled to first (Vout−) and second (Vout+) outputs of the folded cascode stage (2B). The first and second outputs are coupled to... Agent: Texas Instruments Incorporated

20080246544 - Offset adjustment device, semiconductor device, display device, offset adjustment method, noise detection device, and noise detection method: In one embodiment of the present invention, an operational amplifier circuit, a switching element is closed and a switching element is opened. A latch circuit DL latches an output voltage of an operational amplifier and supplies a Q output corresponding to the output voltage. A control circuit supplies an offset... Agent: Harness, Dickey & Pierce, P.L.C

20080238539 - Arrangement for canceling offset of an operational amplifier: Operational amplifier circuitry drives a device which may be run with a combination of output signals fewer in number than the output signals delivered from plural output circuits. Each output circuit adjusts the gain of an input signal supplied to its operational amplifier. An output selector selects and outputs output... Agent: Studebaker & Brackett PC

20080238540 - Power amplifier with noise shaping: A power amplifier with noise shaping is disclosed. The power amplifier with noise shaping is able to minimize the noise interference a regular power amplifier encounters. The power amplifier includes a differential-mode integrator, a driving unit, and a low pass filter and integration unit. The differential-mode integrator receives a differential-mode... Agent: J C Patents, Inc.

20080238541 - Spatially distributed amplifier circuit: An exemplary amplifier circuit includes a first group of spatially distributed final amplifier stages having a first configuration, and a second group of spatially distributed final amplifier stages having a second configuration different than the first configuration. Both groups share the same control node for their respective final amplifier stages,... Agent: Zagorin O'brien Graham LLP (023)

20080238542 - Variable gain amplifier and method for achieving variable gain amplification with high bandwidth and linearity: A fine granularity, wide-range variable gain amplifier (“VGA”) comprises an attenuator, a high gain signal path, a low gain signal path and a gain adjustment control to adjust a gain of the VGA, wherein the gain adjustment control is configured to cause a selective activation of at least a portion... Agent: Brake Hughes Bellermann LLP C/o Intellevate

20080238543 - Digital amplifier with analogue error correction circuit: Digital amplifier for amplifying a digital input signal, comprising a digital modulator for converting the digital input signal into an amplitude-discrete and temporally analogue signal, comprising an analogue error correction circuit which modulates the pulse widths of the amplitude-discrete and temporally analogue signal in dependence on an analogue error signal,... Agent: Lee & Hayes, PLLC

20080238544 - Amplifier pre-distortion systems and methods: A method of optimizing performance of a multiple path amplifier includes: splitting an input signal to derive a respective sub-signal for each branch of the multiple path amplifier; independently pre-distorting each sub-signal using a known performance characteristic of its associated branch of the multiple path amplifier; and supplying each pre-distorted... Agent: Ogilvy Renault LLP

20080238545 - Linearized class ab biased differential input stage: A linearized bipolar differential input stage that contains two high gain current mirrors coupled in series with the input voltage signal through the input transistors to allow the output differential current to greatly exceed the DC output current in a Class AB fashion. The extended output current range over and... Agent: Don Roy Sauer

20080238546 - Fully differential class ab amplifier and amplifying method using single-ended, two-stage amplifier: A fully differential amplifier includes a first single-ended current mirror type fully differential amplifier outputting a first output signal by two stage amplifying a difference between a first input signal and a second input signal and a second single-ended current mirror type fully differential amplifier outputting a second output signal... Agent: F. Chau & Associates, LLC

20080238547 - Offset canceling circuit and offset canceling method: An offset canceling circuit includes a differential amplifier circuit configured to output a first output signal in response to a differential input signal; a latch circuit configured to hold a second output signal determined based on the first output signal; and an offset control circuit configured to supply a reference... Agent: Nec Corporation Of America

20080238548 - Differential feedback amplifier circuit with cross coupled capacitors: The present invention relates to a differential feedback amplifier circuit with cross coupled capacitors. Wherein, the first and second input terminals of a source follower are respectively coupled to the first and second output terminals of a differential amplifier, and a resistor is respectively coupled between the first output terminal... Agent: Troxell Law Office PLLC One Skyline Place

20080238549 - Amplifier electronic circuit comprising a differential pair and a feedback system: An amplifier electronic circuit with at least one amplifier stage, including a differential pair that includes two input transistors controlled by respective input signals and means for measuring the common mode output voltage of the amplifier, includes at least one first electronic component and one second electronic component, each electronic... Agent: Brinks Hofer Gilson & Lione

20080238551 - Amplifier circuit: An amplifier circuit for amplifying a high-frequency input signal comprises an amplifier stage, which amplifies the high-frequency input signal as a function of an operating point of the amplifier stage and generates an operating point-dependent signal, an observer stage, which replicates the amplifier stage and generates an observation signal, a... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20080238550 - Power amplifier and transmission and reception system: A power amplifier includes: a first multi-finger FET formed on a semiconductor substrate; a second multi-finger FET formed on the semiconductor substrate; a first temperature detector which detects a channel temperature of the first FET; a second temperature detector which detects a channel temperature of the second FET; a third... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080238552 - Semiconductor device: A semiconductor device includes a phase compensation circuit 6 using a MOS capacitor with a structure in which an insulating film is disposed between a gate electrode formed on a semiconductor substrate and a diffusion layer. The phase compensation circuit includes first and second MOS capacitors 14, 15. A gate... Agent: Hamre, Schumann, Mueller & Larson P.C.

20080238553 - Power amplifying device having linearizer: There is provided a power amplifying device having a linearizer in which a bias circuit has an initial impedance set when initially operated, then the impedance is varied according to a level of an input signal and the input signal is amplified in a broad range from a low level... Agent: Lowe Hauptman Ham & Berner, LLP

20080238554 - 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