Amplifiers inventions 08/09

20090212856 - Analog amplifier having dc offset cancellation circuit and method of offset cancellation for analog amplifiers: An amplifier having DC offset compensation includes at least one input node and a pair of differential output nodes, a biasing circuit coupled to the input node; and a plurality of current sources. Selected ones of said current sources are coupled to the input node to adjust a DC voltage... Agent: Mendelsohn, Drucker, & Associates, P.c.

20090212857 - Dc self-biased vacuum tube differential amplifier with grid-to-cathode over-voltage protection: A single stage differential amplifier is disclosed as comprising a pair of vacuum tube triodes for amplifying two input signals and generating two output signals. The differential amplifier has DC self-biasing ability and grid-to-cathode over-voltage protection for directly coupling from the outputs of another differential amplifier. By possessing these unique... Agent: William J. Sapone Coleman Sudol Sapone P.c.

20090212858 - Integrated doherty type amplifier arrangement with high power efficiency: The present invention relates to an integrated Doherty type amplifier arrangement and an amplifying method for such an arrangement, wherein a lumped element hybrid power divider (12) is provided for splitting input signals of main and peak amplifier stages (20, 30, 40) at predetermined phase shifts and non-equal division rates... Agent: Nxp, B.v. Nxp Intellectual Property & Licensing

20090212859 - Amplifier circuit and methods of operation thereof: A signal amplifying circuit and associated methods and apparatuses, the circuit comprising: a signal path extending from an input terminal to an output terminal, a gain controller arranged to control the gain applied along the signal path in response to a control signal; an output stage within the signal path... Agent: Dickstein Shapiro LLP

20090212860 - Integrated circuit device and electronic instrument: An integrated circuit device includes an amplifier circuit that includes first to Nth amplifiers that are cascaded and receives an input signal, an A/D converter that performs an A/D conversion process on a signal amplified by the amplifier circuit, first to Nth D/A converters that are provided corresponding to the... Agent: Oliff & Berridge, Plc

20090212861 - Low noise amplifier: A low noise amplifier is provided. The low noise amplifier includes: a low noise amplifying unit amplifying an input signal; a harmonic and noise generating unit disposed in an input terminal of the low noise amplifying unit, for generating a compensating signal for compensating for an intermodulation distortion signal and... Agent: Dla Piper LLP Us

20090212862 - Op-amp circuit and op-amp circuit driving method: The present invention is to provide a CMOS op-amp circuit, an op-amp circuit and an op-amp circuit control method that can increase operating speed when the op-amp circuit stabilizes to a steady state after release of a power down state. During power down, a voltage is applied to a node... Agent: Studebaker & Brackett Pc

20090212863 - Power amplifier: In the power amplifier of the invention, at a start of power amplification by an amplifier transistor 103 serving as an amplification section, a speedup circuit 122 transiently increases a bias which is fed to the amplifier transistor 103 via a bias power source section composed of a bias circuit... Agent: Birch Stewart Kolasch & Birch

20090212865 - Differential audio amplifier: A differential audio amplification apparatus with common mode rejection is shown, having a first input current path (401) and a second input current path (402) with a shunting input resistance (400) therebetween. The apparatus also has a first output current path (403) and a second output current path (404) with... Agent: Richard M. Goldberg

20090212864 - Preamplifier for receiver and method thereof: A preamplifier used in a receiver is provided. The preamplifier comprises an input circuit and an output circuit. The input circuit receives an input differential voltage pair, pulls it down when the common voltage of the input differential voltage pair is higher than a reference voltage. The output circuit receives... Agent: Rabin & Berdo, Pc

20090212866 - Class ab amplifier: An amplifier is disclosed. An input transistor receives an input voltage. An impedance unit is coupled to a first electrode of the input transistor. A current source is coupled to a second electrode of the input transistor. A push-pull output circuit comprises a PMOS transistor and a NMOS transistor electrically... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090212867 - Integrated circuit device and electronic instrument: An integrated circuit device includes an amplifier circuit that receives an input signal and performs an offset adjustment corresponding to a DC offset of the input signal and a gain adjustment corresponding to an amplitude of the input signal, a filter that is provided in a subsequent stage of the... Agent: Oliff & Berridge, Plc

20090212869 - Distributed amplifier with negative feedback: A distributed amplifier may include an input transmission line for receiving on an input end an input signal, and an output transmission line for outputting on an output end an output signal. A plurality of amplifier stages may be coupled between intermediate positions on the input and output lines. Feedback... Agent: Kolisch Hartwell, P.c.

20090212868 - Low power comsumption, low noise and high power gain distributed amplifers for communication systems: Provided is a distributed amplifier in communication systems, including: an input transmission line; an output transmission line; an input impedance match and an output impedance match, for providing termination of the input transmission line and the output transmission line, respectively and for preventing signal reflection in the input transmission line... Agent: J C Patents, Inc.

20090212870 - Cascode-cascade power amplifier assembly: A cascode-cascade power amplifier assembly is provided. Which includes a first common-source amplifier, a second common-source amplifier, a phase shift matching network coupled to the first common-source amplifier and the second common-source amplifier for providing a 90-degree phase shift and allowing less than 50% of the output power of the... Agent: Edwards Angell Palmer & Dodge LLP

20090212871 - Multi-planar solid state amplifier: A solid state power amplifier (SSPA) system may include a radio frequency (RF) input, an RF waveguide split block, multiple monolithic microwave integrated circuit (MMIC) power amplifier modules, and/or a heat spreader. The power amplifier modules and RF waveguide may be distributed about the heat spreader in different planes. Furthermore,... Agent: Snell & Wilmer L.l.p (usm/viasat)

20090212872 - Wideband active balun using darlington pair: An active balun with Darlington pairs obtains a wideband operation. With differential output signals, a size of the active balun is minimized. The present invention can be applied to a transceiver. With a wideband amplitude match and 180° out of phase, the performance of the transceiver is improved by the... Agent: Troxell Law Office Pllc

20090212873 - 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: Stanley P. Fisher Reed Smith LLP

20090206927 - Amplifier: There is provided an amplifier for combining outputs of a plurality of amplifying circuits to generate an amplifier output. The amplifier includes a first amplifying circuit for operating a first amplifying device in class-AB, wherein the first amplifying circuit is one among the plurality of the amplifying circuits; a second... Agent: Bacon & Thomas, PLLC

20090206928 - Enhanced doherty amplifier with asymmetrical semiconductors: The present disclosures an amplification unit which comprises a first amplifier and a second amplifier connected in parallel, the first amplifier and the second amplifier comprising semiconductor devices that are not the same amplifier design. The present application also discloses a signal input line connected to the first amplifier and... Agent: Nortel Networks Limited

20090206926 - High efficiency amplifier: When an input signal level is small, the electrical length of a phase line 21 and the electrical length of a phase line 23 are set in such a manner that the impedance seen by looking into the output side from an impedance reference point 11 at the output side... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090206930 - Amplifier circuit with voltage interpolation function: An amplifier circuit with a voltage interpolation function includes an N-type differential pair and a P-type differential pair. The N-type differential pair includes a first transconductance value, and has a first differential input terminal coupled to a first voltage and a second differential input terminal coupled to a voltage output... Agent: North America Intellectual Property Corporation

20090206931 - Differential amplifier and applications thereof: A differential amplifier includes a first pair of differential amplifiers and a second pair of differential amplifiers. These first and second pairs of differential amplifiers are connected between first power rails and are arranged to receive a differential input signal. Third and fourth pairs of differential amplifiers are connected between... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20090206929 - Operation amplifier for improving slew rate: An OP amplifier including an input stage and an output stage for improving a slew rate is provided. The input stage receives one of input voltages, and generates an internal voltage according to the received input voltage. The output stage receives and gains the internal voltage, and outputs an output... Agent: J C Patents, Inc.

20090206932 - Low noise amplifier gain controlled scheme: An amplifier includes an amplifier module coupled to an input node, and an attenuating module. The attenuating module includes an attenuation resistor coupled to the input node, and an impedance compensation module coupled to the input node. The impedance compensation module compensates an input impedance when an input RF signal... Agent: Kirton And Mcconkie

20090206933 - Dual bias control circuit: The present invention relates to a bias control circuit and method for supplying a bias signal to at least one stage of an amplifier circuit, wherein a dual bias control is provided by generating a bias current and additionally using this bias current to derive a control signal for limiting... Agent: Nxp, B.v. Nxp Intellectual Property & Licensing

20090206934 - Amplifier auto biasing: This disclosure relates to monitoring signal overshoot of an amplifier generated signal and automatically adjusting a quiescent current of the amplifier as a function of the monitored signal overshoot.... Agent: Lee & Hayes, PLLC

20090206935 - Reconfigurable circuit to compensate for a low noise amplification input matching variation and a method for its configuration: A method for changing an effective capacitance of an amplifier circuit having a match transistor and a coupled cascode transistor includes changing an on-state of at least one of a plurality of sub-transistors of the match transistor. The method further includes changing a transconductance of the match transistor as a... Agent: Texas Instruments Incorporated

20090201083 - Amplifier device and system using the device: A device comprising: an input for an electric signal; an integrator stage connected to said input to provide an integrated signal; an amplifier stage electrically coupled to the integrator stage to receive said integrated signal and to provide an output signal. The device being characterized in that the integrator stage... Agent: Seed Intellectual Property Law Group PLLC

20090201084 - Multi-mode power amplifiers: Multi-mode power amplifiers that can support multiple radio technologies and/or multiple frequency bands are described. In one exemplary design, a first linear power amplifier supporting multiple radio technologies may be used to amplify a first RF input signal (e.g., for low band) and provide a first RF output signal. A... Agent: Qualcomm Incorporated

20090201085 - Power amplifying apparatus and mobile communication terminal: A power amplifying apparatus includes an input terminal configured to receive an input signal, a first power amplifier biased for class A or class AB operation which is configured to amplify the input signal, an output terminal connected to an output of the first power amplifier, a second power amplifier... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090201086 - Current sense amplifier with extended common mode voltage range: A circuit includes an input stage configured to receive and amplify an input signal to produce an amplified signal, where the input signal is referenced to a higher voltage and is associated with a common mode voltage. The circuit also includes level shifter resistors configured to level shift the amplified... Agent: Munck Carter/nsc

20090201087 - Differential input amplifier: An amplifier comprises: first and second supply terminals intended to receive a DC supply voltage; a first branch coupled between the first and second supply terminals and including a first terminal of application of a differential signal to be amplified; a second branch coupled between the first and second supply... Agent: Seed Intellectual Property Law Group PLLC

20090201089 - High frequency power amplifier: A high frequency power amplifier includes an amplifying device for amplifying an input high frequency signal, a harmonic reflection circuit for reflecting a harmonic outputted from the amplifying device, and a harmonic generating circuit provided at an input terminal of the amplifying device, the harmonic generating circuit including a divider... Agent: Bacon & Thomas, PLLC

20090201088 - Measuring load impedance of an amplifier driving a variable load: According to an aspect of the present invention, the magnitude and phase angle of looking-in impedance driven by an amplifier are computed in digital domain during normal operation within a module containing the amplifier. In an embodiment, the computed magnitude and phase angle are used for impedance matching at a... Agent: Texas Instruments Incorporated

20090201090 - Signaling system with low-power aut0matic gain control: An integrated circuit device includes a variable-gain amplifier, memory circuit and gain control update circuit. The variable-gain amplifier generates an amplified signal having an amplitude according to a gain control value that is stored, at least during a first interval, within the memory circuit. The update circuit generates an updated... Agent: Shemwell Mahamedi LLP

20090201091 - System and method for controlling attenuator: An apparatus for setting an attenuation of an attenuator includes a control transistor, which includes a drain connected to a gate of a shunt transistor of the attenuator. A channel resistance of the shunt transistor corresponds to a current density of the control transistor, and the channel resistance of the... Agent: Kathy Manke Avago Technologies Limited

20090201083 - Amplifier device and system using the device: A device comprising: an input for an electric signal; an integrator stage connected to said input to provide an integrated signal; an amplifier stage electrically coupled to the integrator stage to receive said integrated signal and to provide an output signal. The device being characterized in that the integrator stage... Agent: Seed Intellectual Property Law Group PLLC

20090201084 - Multi-mode power amplifiers: Multi-mode power amplifiers that can support multiple radio technologies and/or multiple frequency bands are described. In one exemplary design, a first linear power amplifier supporting multiple radio technologies may be used to amplify a first RF input signal (e.g., for low band) and provide a first RF output signal. A... Agent: Qualcomm Incorporated

20090201085 - Power amplifying apparatus and mobile communication terminal: A power amplifying apparatus includes an input terminal configured to receive an input signal, a first power amplifier biased for class A or class AB operation which is configured to amplify the input signal, an output terminal connected to an output of the first power amplifier, a second power amplifier... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090201086 - Current sense amplifier with extended common mode voltage range: A circuit includes an input stage configured to receive and amplify an input signal to produce an amplified signal, where the input signal is referenced to a higher voltage and is associated with a common mode voltage. The circuit also includes level shifter resistors configured to level shift the amplified... Agent: Munck Carter/nsc

20090201087 - Differential input amplifier: An amplifier comprises: first and second supply terminals intended to receive a DC supply voltage; a first branch coupled between the first and second supply terminals and including a first terminal of application of a differential signal to be amplified; a second branch coupled between the first and second supply... Agent: Seed Intellectual Property Law Group PLLC

20090201089 - High frequency power amplifier: A high frequency power amplifier includes an amplifying device for amplifying an input high frequency signal, a harmonic reflection circuit for reflecting a harmonic outputted from the amplifying device, and a harmonic generating circuit provided at an input terminal of the amplifying device, the harmonic generating circuit including a divider... Agent: Bacon & Thomas, PLLC

20090201088 - Measuring load impedance of an amplifier driving a variable load: According to an aspect of the present invention, the magnitude and phase angle of looking-in impedance driven by an amplifier are computed in digital domain during normal operation within a module containing the amplifier. In an embodiment, the computed magnitude and phase angle are used for impedance matching at a... Agent: Texas Instruments Incorporated

20090201090 - Signaling system with low-power aut0matic gain control: An integrated circuit device includes a variable-gain amplifier, memory circuit and gain control update circuit. The variable-gain amplifier generates an amplified signal having an amplitude according to a gain control value that is stored, at least during a first interval, within the memory circuit. The update circuit generates an updated... Agent: Shemwell Mahamedi LLP

20090201091 - System and method for controlling attenuator: An apparatus for setting an attenuation of an attenuator includes a control transistor, which includes a drain connected to a gate of a shunt transistor of the attenuator. A channel resistance of the shunt transistor corresponds to a current density of the control transistor, and the channel resistance of the... Agent: Kathy Manke Avago Technologies Limited

20090195305 - Analog switch controller: Methods and systems for implementing an analog switch controller to improve linearity of analog switches are described.... Agent: Lee & Hayes, PLLC

20090195306 - Switched-capacitor circuit having switch-less feedback path: A switched-capacitor circuit includes a plurality of cascaded differential-input, single-ended-output amplifiers. A negative feedback path, from an output terminal of a last of the cascaded amplifiers to an input terminal of a first of the cascaded amplifiers, is configured to exclude, and not be shorted out by, any switches.... Agent: Kenyon & Kenyon LLP

20090195307 - Multiple-path power amplifier: An amplifier circuit and method for amplifying a signal efficiently over a plurality of power ranges. The amplifier circuit including a strong amplifier which is efficient over a first power range and a weak amplifier which is efficient over a second power range. An impedance transformation circuit is used for... Agent: The Mueller Law Office, P.C.

20090195308 - Automatic gain control circuit: An automatic gain control circuit includes a first voltage dividing resistor, a filter circuit, a switch circuit, and an amplifying circuit. The first voltage dividing resistor divides a voltage of the automatic gain control circuit using an internal impedance of the audio device to produce a divided DC voltage, wherein... Agent: PCe Industry, Inc. Att. Steven Reiss

20090195309 - Distortion compensator apparatus, amplifier apparatus, transmitter, and method of compensating distortion: This distortion compensator apparatus is a distortion compensator apparatus compensating nonlinearity of an amplifier and includes: a memory storing a compensation parameter used for correcting an input signal of the amplifier; a compensator correcting the input signal of the amplifier based on the compensation parameter; and an update controller updating... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20090195310 - Lna having a post-distortion mode and a high-gain mode: A differential low noise amplifier (LNA) is operable in a selectable one of two modes. The LNA includes a first transistor, a second transistor, a third transistor and a fourth transistor. In the first mode (PDC mode), the four transistors are configured to operate as a post-distortion cancellation (PDC) LNA.... Agent: Qualcomm Incorporated

20090195312 - Differential amplifier: A differential amplifier comprises a left amplifier having transistors, a right amplifier having transistors, a negative feedback network having a resistor, and a negative feedback network having a transformer with a center tap. Phase compensation networks comprising a capacitor and a resistor, a capacitor and a resistor, and a capacitor... Agent: Baker & Mckenzie LLP Patent Department

20090195311 - Independent dominant pole compensation of two loops using one compensation element: Disclosed is a differential amplifier system that maintains high speed characteristics of the differential amplifier while providing stability from a common-mode loop by using dominant pole compensation. The disclosed system includes a first and second transconductance stage, a circuit having high impedance, and a compensation circuit.... Agent: Kenyon & Kenyon LLP

20090195313 - Boosted tail-current circuit: A circuit includes a pair of input transistors configured as a differential pair and having input terminals configured to receive an input voltage. The circuit also includes a first current source connected to and configured to provide a first tail current to the pair of input transistors, the first tail... Agent: Kenyon & Kenyon LLP

20090195314 - Device and method for amplifying pulsed rf signals: Device and method are described for amplifying pulsed RF signals, comprising one or more transistors, each comprising a drain, a gate and a source. A device synchronizes the supply for the drain with an RF pulse.... Agent: Lowe Hauptman & Berner, LLP

20090195316 - Re-configurable low noise amplifier utilizing feedback capacitors: A re-configurable low noise amplifier utilizing feedback capacitors is disclosed. The low noise amplifier has output transistors, capacitor switch cells, and capacitance distributors all in an output terminal. The output transistors are for controlling selection of a specific frequency band in a wide band of frequencies. The capacitor switch cells... Agent: Kirton And Mcconkie

20090195315 - Sample-and-hold amplifiers: A sample-and-hold amplifier is provided. The sample-and-hold amplifier comprises a sample-and-hold circuit and a buffer circuit. The sample-and-hold circuit receives an input signal and transmits the input signal to a first node according to a control signal. The buffer circuit is coupled between a supply voltage source and a ground... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20090195317 - Multi-mode high efficiency linear power amplifier: A power amplifier includes a plurality of amplification paths in which at least one amplification path is selectively enabled and disabled, wherein each amplification path includes an output impedance modification element and an output phase shift element that is operable independently from the output impedance modification element, and wherein the... Agent: Smith Frohwein Tempel Greenlee Blaha LLC

20090195319 - Large time constant steering circuit and instrumentation amplifier implementing same: The present invention relates to a large time constant steering circuit for slowly changing a voltage on a node between at least two discrete voltage levels. The present invention further relates to a slow steering current DAC comprising said large time constant steering circuit. The present invention further relates to... Agent: Mcdonnell Boehnen Hulbert & Berghoff LLP

20090195318 - Self regulating biasing circuit: A disclosed self regulating biasing circuit (SRBC) includes an unregulated node that couples to an unregulated power supply that produces a supply voltage. An impedance element of the SRBC carries an unregulated current having a nominal component and a variance component between an unregulated node and a regulated node. A... Agent: Joseph Lally Jackson Walker, L.L.P.

20090195320 - Implementing layout of integrated circuit containing operational amplifier: A method for implementing a layout of an integrated circuit containing an OP (operational amplifier) is disclosed. The method includes constructing an output path connecting an output terminal of the OP to an output pad of the OP; and constructing a feedback path connecting an input terminal of the OP... Agent: Stout, Uxa, Buyan & Mullins LLP