Amplifiers inventions

20080100379 - Sensor interface circuitry having adjustable gain and q, and method for adjusting sensor interface circuitry gain and q: A sensor interface filter having adjustable gain and Q is provided. The sensor interface includes a first operational amplifier coupled to gain circuitry, a gain stage, and a resistor. The gain circuitry and gain stage are electrically coupled to each other. The gain stage includes a gain stage switch, and... Agent: Delphi Technologies, Inc.

20080100380 - Operational amplifier and display device: To reduce the apparent effect of offset voltage by making the offset voltage spatially scattered. An operational amplifier 1 includes: a first differential pair having N-channel MOS transistors MN1 and MN2; a second differential pair having P-channel MOS transistors MP1 and MP2; an output stage having output transistors NP3 and... Agent: Mcginn Intellectual Property Law Group, PLLC

20080100381 - Common drain driven cascode enhancement mode traveling wave amplifier: A traveling wave amplifier includes a synthetic gate line, a synthetic drain line and a plurality of common drain driven cascode transistor circuits each connected between the synthetic gate line and the synthetic drain line.... Agent: Kathy Manke Avago Technologies Limited

20080100382 - System and method for pre-charging a current mirror: A system for pre-charging a current mirror includes a controller configured to provide a first current and an additional current to a current mirror to rapidly charge a capacitance associated with the current mirror based on a reference voltage.... Agent: Smith Frohwein Tempel Greenlee Blaha, LLC

20080100383 - Bias circuit: A bias circuit 100 comprises: a first reactance means 2 connected to an AC circuit; a second reactance means 3 connected to the first reactance means 2; a switch 7 connected to a connection point 210 between them; a third reactance means 8 connected to the switch 7; a capacitive... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080094136 - Amplifier circuit and method of generating bias voltage in amplifier circuit: Provided are a differential amplifier circuit and a method of generating a bias voltage in a differential amplifier circuit. The differential amplifier circuit is turned on or turned off in response to an input voltage and includes a differential amplifier and a bias circuit. The bias circuit provides a first... Agent: Mills & Onello LLP

20080094135 - Dc offset mitigation in a single-supply amplifier: An amplifier is described which includes a first loop including a first amplifier stage having an offset voltage associated therewith. An output stage includes two switching devices in a bridge configuration configured to be coupled between a supply voltage and ground. An output of the bridge configuration is configured to... Agent: Beyer Weaver LLP

20080094137 - Power control and modulation of switched-mode power amplifiers with one or more stages: This invention controls and modulates switched-mode power amplifiers to enable the production of signals that include amplitude modulation (and possibly, but not necessarily, phase modulation), the average power of which may be controlled over a potentially wide range.... Agent: Michael E. Forgarty, Esq. Mcdermott Will & Emery LLP

20080094138 - Monotonic and voltage supply independent automatic gain control amplifier: A method and circuit are provided wherein the magnitude of an RF signal provided by RF circuit is used to derive a control set point of the RF circuit via an intermediate controller circuit. This controller circuit having the specific function of providing the actual voltage applied to the control... Agent: Kenyon & Kenyon LLP

20080094139 - Power amplifier with distortion compensation circuit: A power amplifier negates a memory effect and is applied a linearizer using a digital predistortion system even in an inexpensive device. The power amplifier compares an input signal power against a sampled component of an output power, and provides predistortion to the input signal power so as to minimize... Agent: Bingham Mccutchen LLP

20080094140 - Ratio-independent switched capacitor amplifiers and methods of operating ratio-independent switched capacitor amplifiers: A ratio-independent switched capacitor amplifier includes a first sampling circuit configured to sample a first input voltage as a first sampling voltage and to double a level of the first sampling voltage during an interval in which the first input voltage is cut off; a second sampling circuit configured to... Agent: Myers Bigel Sibley & Sajovec

20080094141 - High-frequency power amplifier: A high-frequency power amplifier has an FET element having a unit FETs in multifinger form, and having a gate pad through which a signal is input, a source pad that is grounded, and a drain pad through which a signal is output. A high-frequency processing circuit includes series resonance circuits... Agent: Leydig Voit & Mayer, Ltd

20080094142 - Power amplifier: A power amplifier amplifies an input signal having a fundamental frequency of which band width ranges between a first fundamental frequency F1 and a second fundamental frequency F2. The power amplifier includes a power amplifier transistor for amplifying the input signal and an output matching circuit for suppressing a harmonic... Agent: Mcdermott Will & Emery LLP

20080094143 - Dc coupled microwave amplifier with adjustable offsets: An output amplifier stage covers a flat frequency range of DC to microwave frequencies with provisions for independent control of input and output DC offset. The output amplifier stage includes a standard AC coupled microwave amplifier for high frequency performance. The AC coupled amplifier is intended for use as an... Agent: Martin C. Fliesler Fliesler Meyer LLP

20080088368 - Offset voltage correction for high gain amplifier: A method and an apparatus are described for an offset correction in a high gain amplifier. An embodiment of an amplifier circuit includes an amplifier to convert a current signal into a voltage signal, where the amplifier generates an offset voltage in the voltage signal. The amplifier circuit also includes... Agent: Blakely, Sokoloff, Taylor & Zafman LLP

20080088369 - 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

20080088371 - Method, apparatus and system for reducing dc coupling capacitance at switching amplifier: A digital amplifier, a reference voltage generator for reducing a DC component of an amplified pulse width modulated signal of a digital amplifier, and a method of reducing a DC component of an amplified pulse width modulated signal applied to an input node of a load are described in this... Agent: Harness, Dickey & Pierce, P.L.C

20080088370 - Method, apparatus and system for reducing noise from an amplifier: A digital amplifier, a noise reduction circuit and a method of reducing noise from an output signal of a digital amplifier are described in this disclosure. The digital amplifier includes a driving circuit for providing a driving signal, a filter for filtering the driving signal and providing the filtered driving... Agent: Harness, Dickey & Pierce, P.L.C

20080088372 - Subtractor circuit and operational amplifier: Disclosed herein is a subtractor circuit for outputting an output voltage as a difference between a first input voltage and a second input voltage. The subtractor circuit may include a first semiconductor element, a second semiconductor element, a third semiconductor element, a fourth semiconductor element, a fifth semiconductor element, and... Agent: Lerner, David, Littenberg, Krumholz & Mentlik

20080088373 - Differential amplifier using body-source cross coupling: Disclosed herein is a differential amplifier using body-source cross coupling. In a common gate differential amplifier in which common gate amplifiers are implemented in a differential structure, since the bodies of the common gate amplifiers are cross coupled to the sources of the opposite common gate amplifiers, it is possible... Agent: Oliff & Berridge, PLC

20080088374 - Variable gain amplifiers: Variable gain amplifiers with wider linear range are provided, in which first and second loads are coupled to a power voltage, and a transconductor cell comprises first and second transistors, a gain control transistor, and first and second current sources. The first and second transistors comprise control terminals receiving a... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20080088375 - Class ad audio amplifier: a control stage (42) for controlling the current source (40) from the current (i1) delivered by the voltage generator (18). The control stage (42) for controlling the current source (40) includes current measurement elements (43) for measuring the current (i1) delivered by the voltage generator (18), which elements are disposed... Agent: Young & Thompson

20080088376 - High frequency power amplifier: A small, high performance high frequency power amplifier enables easily adjusting and switching the impedance. The high frequency power amplifier module includes a first semiconductor chip including one or a plurality of high frequency amplification devices, and a second semiconductor chip including one or more high frequency matching circuit devices... Agent: Ratnerprestia

20080088377 - Apparatus for and method of biasing a transistor: An apparatus for biasing a transistor, comprising: a controllable bias generator; a test circuit; a digital Mth order differentiator responsive to an output of the test circuit; and a controller responsive to the digital Mth order differentiator for controlling the controllable bias generator; wherein the test circuit is configured to... Agent: Wolf Greenfield & Sacks, P.C.

20080084244 - Method and system for linearizing the characteristic curve of a power amplifier: According to a method, a first signal is produced from a digital input signal by pre-emphasis and said signal is supplied, after carrier frequency translation, D/A conversion and modulation, to a power amplifier for producing a carrier-frequency output signal. IN order to linearize the characteristic curve of the power amplifier,... Agent: Staas & Halsey LLP

20080084245 - Operational amplifier: An operational amplifier and use of an operational amplifier is provided that includes an input differential amplifier, which is connected to a first input and to a second input and a differential output stage, which is connected to the input differential amplifier and a first output and a second output.... Agent: Mg-ip Law, Pllc

20080084246 - Bias circuit with increased power supply rejection: According to one exemplary embodiment, a power supply rejection bias circuit includes a first amplifier coupled to a second amplifier, where the first amplifier receives a reference voltage, and a feedback voltage of the bias circuit. The bias circuit further includes an output transistor driven by the output of the... Agent: Farjami & Farjami LLP