Amplifiers inventions 04/07

20070090873 - Offset canceller for compensating for offset in signal output: An offset canceller outputs a signal during its offset compensating operation and compensates for the offset by capacitance or resistance devices connected externally to an operational amplifier. A driving circuit includes plural output circuits #1 to #n+1 for outputting driving signals to plural output terminals #1 to #n on one... Agent: Nixon Peabody, LLP

20070090874 - Rf power transmission, modulation, and amplification embodiments: Methods and systems for vector combining power amplification are disclosed herein. In one embodiment, a plurality of signals are individually amplified, then summed to form a desired time-varying complex envelope signal. Phase and/or frequency characteristics of one or more of the signals are controlled to provide the desired phase, frequency,... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20070090875 - Feedback circuit for an operational amplifier, a current to voltage converter including such a circuit and a digital to analog converter including such a circuit: A feedback circuit for an operational amplifier is provided, the circuit comprising a first impedance element in a current flow path between an output of the operational amplifier and a first node, wherein a plurality of impedance elements are, in response to a control signal, selectively connectable either between the... Agent: Wolf Greenfield & Sacks, PC

20070090876 - Apparatus for variable gain amplifiers and mixers: Novel uses of current-dividing multi-transistors (composite transistors) are described. The composite transistors can replace transistors in otherwise traditional circuits by making suitable design changes. Arrangements of these composite transistors in amplifiers and mixers allow easy selection of current and hence gain in circuits driven by them. In appropriate configurations, they... Agent: Gowling Lafleur Henderson LLP

20070090877 - Wideband circuits and methods: Embodiments of the present invention include circuits and methods with wide bandwidths. In one embodiment, parasitic capacitances of the output of a first stage and the input of a second stage are included in a network. The output of the first stage is coupled to the input of the network,... Agent: Chad R. Walsh Fountainhead Law Group PC

20070090878 - Ultra high linearity amplifier: The output of a commercially available integrated high gain differential amplifier that already has reasonable linearity is connected back to the (−) input to obtain the well known circuit configuration for a non-inverting amplifier, whose gain may be unity or greater, and whose linearity in response to the (+) input... Agent: Agilent Technologies Inc.

20070090879 - Active input load wide bandwidth low noise hemt amplifier: A relatively wide bandwidth low noise amplifier with an active input matching network. The active load maybe formed from a field effect transistor (FET) or high electron mobility transistor (HEMT) in a common gate configuration. The active load input matching network has a lower overall noise component to only transistor... Agent: Patent Administrator Katten Muchin Rosenman LLP

20070090880 - Operational amplifier for outputting high voltage output signal: An operational amplifier includes a differential amplifier circuit, receiving a low voltage signal, and a current mirror circuit provided on the downstream. The differential amplifier circuit also includes low withstand voltage N-channel transistors, connected to respective input terminals, and high withstand voltage N-channel transistors, connected to the drain electrodes of... Agent: Nixon Peabody, LLP

20070085602 - High-efficiency mixed-mode power amplifier: Provided is a power amplifier of a low-power consumption system that has linearity at a peak output power while increasing efficiency in a most frequently used range, and thereby enables a battery to last longer. The power amplifier includes an input impedance matcher for impedance-matching a signal input from the... Agent: Blakely Sokoloff Taylor & Zafman

20070085603 - Slew rate enhancement circuit via dynamic output stage for adjusting gamma curve: A slew rate enhancement circuit for adjusting a gamma curve including a main output stage, a monitoring stage, an assistant output stage and a gamma curve generating device is provided. The main output stage also generates a first push signal and a first pull signal according to the input voltage,... Agent: Jianq Chyun Intellectual Property Office

20070085604 - Method and apparatus for reducing ripple in class d amplifiers: Class D amplifiers are used for their high efficiency, but they have some undesirable characteristics, one of these being the residual switching frequency ripple. Embodiments of the present invention comprise methods and apparatuses for reducing the switching frequency ripple using a technique known herein as ripple steering. A secondary output... Agent: The Hecker Law Group

20070085605 - Differential amplifier: A differential amplifier is disclosed. The differential amplifier includes a first load element coupled between a first voltage and a first node. A second load element is coupled between the first voltage and a second node. A current source is coupled between a second voltage and a third node. A... Agent: Volentine Francos, & Whitt PLLC

20070085606 - Digital time variable gain circuit for non-destructive test instrument: In a non-destructive test instrument, there is provided a time variable gain (TVG) amplifier wherein the gain of the amplifier is dynamically changed to optimize the amplitude of a flaw echo signal. The TVG digital memory for a given TVG curve specifies and controls not only the start gain value,... Agent: Ostrolenk Faber Gerb & Soffen

20070085607 - Electronic circuit for amplification of a bipolar signal: The present invention relates to an electronic circuit for amplification of bipolar symmetric current signals. The electronic circuit has a pair of complimentary current mirrors. Depending on the polarity of the bipolar current signal one or the current mirrors is active while the other current mirror is in an off... Agent: Philips Electronics North America Corporation Intellectual Property & Standards

20070085608 - Differential amplifier, digital-to-analog converter, and display device: Disclosed is a differential amplifier of a multi-level output type comprising a load circuit including a diode-connected first transistor with a source thereof connected to a power supply and a second transistor with a source thereof connected to the power supply and connected to a gate of the first transistor... Agent: Foley And Lardner LLP Suite 500

20070085609 - Transmitting arrangement and method for impedance matching: A transmitting arrangement includes a matching circuit, a reference circuit and a comparator. The output of the matching circuit can be coupled to an antenna and comprises an adjustable impedance. The reference circuit is connected to an input of the matching circuit and comprises a reference impedance. Inputs of the... Agent: Eschweiler & Associates, LLC National City Bank Building

20070080745 - Audio amplifier: In a first aspect, the invention provides an audio amplifier. A regulator reference signal corresponding to an input audio signal is generated by regulator reference generator. A power signal is generated corresponding to the regulator reference signal by a voltage regulator. A compensation block also uses the input signal, or... Agent: Bereskin And Parr

20070080746 - Glitch-free controllable rf power amplifier: A power amplifier circuit for amplifying an input RF signal with respect to a specified RF output power includes an input terminal for supplying the input RF signal to be amplified, an output terminal for the RF signal with the output power specified, an amplification path formed between the input... Agent: Myers Bigel Sibley & Sajovec, P.A.

20070080747 - Composite power amplifier: A PAMELA-type of composite power amplifier is configured in such a way that a single power amplifier is operated at low output voltage amplitudes by prohibiting a pair of outphasing power amplifiers to produce any current. Preferably, at output voltage amplitudes above the maximum voltage of the single power amplifier... Agent: Ericsson Inc.

20070080748 - System and method for increasing accuracy of transmitter power detection over a larger range of output power levels: A system and method for increasing accuracy of transmitter power detection over a larger range of output power levels wherein a diode detector is followed by a series cascade of 2 op amps. The first op amp functions as a differential/buffer amplifier, which improves temperature performance. The second op amp... Agent: Tucker, Ellis & West LLP

20070080749 - Adaptive predistortion for a transmit system with gain, phase and delay adjustments: Systems and methods relating to the provision of gain, phase and delay adjustments to signals to be used by a predistortion subsystem. A portion of an input signal is delayed by delay elements prior to being received by the predistortion subsystem. The delayed input signal portion is also received by... Agent: Berkeley Law & Technology Group, LLP

20070080750 - High efficiency amplifiers having multiple amplification paths: Described herein are representative embodiments of amplifiers having multiple amplification paths. In certain exemplary embodiments, the amplifiers are operated as linear power amplifiers, such as may be used in wireless communications systems. In one exemplary embodiment, an amplifier circuit is described comprising switchless amplification paths coupled in parallel to one... Agent: Klarquist Sparkman, LLP

20070075767 - Inductor element containing circuit board and power amplifier module: An inductor element containing circuit board of the present invention comprises a plurality of conductive layers, and a conductor having an inductor function (inductor conductor segment) in one or more of the conductive layers, wherein at least part of the inductor conductor segment is made thicker than other conductors disposed... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070075768 - Circuit configuration having a feedback operational amplifier: The present invention relates to a circuit configuration (10) having a feedback operational amplifier (AMP) for amplifying an input signal (Vin) input into the circuit arrangement (10) and outputting the amplified input signal as an output signal (Vout). The circuit amplification (Vout/Vin) may be changed by alternately connecting or disconnecting... Agent: Pearne & Gordon LLP

20070075769 - Circuit configuration having a feedback operational amplifier: The present invention relates to a circuit configuration (10) having a feedback operational amplifier (AMP) for amplifying an input signal (Vin) input into the circuit arrangement (10) and outputting the amplified input signal as an output signal (Vout). In order to be able to change the circuit amplification (Vout/Vin) easily... Agent: Pearne & Gordon LLP

20070075770 - Base-band digital pre-distortion-based method for improving efficiency of rf power amplifier: The present invention relates to a BDPD-based method for improving efficiency of RF power amplifier, comprising: first, choose key neural network architecture and scale and input initial values of modeling data and network parameters necessary for establishing the neural network model for RF power amplifier; second, correct network parameters with... Agent: Merchant & Gould PC

20070075771 - Anti-theft structure for mobile phone: An anti-theft structure for a mobile phone, the anti-theft structure includes a power device for providing a direct current (DC) voltage, an oscillator circuit receiving the DC voltage and producing an oscillating signal, an amplifying element being connected to the oscillator circuit to amplifying the oscillating signal and producing a... Agent: PCe Industry, Inc. Att. Cheng-ju Chiang Jeffrey T. Knapp

20070075772 - Semiconductor integrated apparatus and black level correction method for image sensor: The challenge of the present invention is to suppress a variation in brightness of an image and make a reference value of a black level converge at an appropriate value in a short time. Acondition judgment circuit judges whether or not a frame of an amount of change in gains... Agent: Arent Fox PLLC

20070075773 - Amplifier having a regulation system controlled by the output stage: An electrical amplifier comprising an output stage that can be supplied by an electrical energy source, is connected to a control device on the input side, the control signal of the control device controlling an output signal of the output stage dependent on a parameter value of the energy source.... Agent: Brinks Hofer Gilson & Lione

20070075774 - Variable gain amplifier: A variable gain amplifier of such configuration that can yield continuously and log-linearly variable gains in relation to control voltage and, at the same time, that does not use an attenuator, an element which otherwise would entail cause of increased noise. The amplifier includes a plurality of gm amplifiers connected... Agent: Miles & Stockbridge PC

20070075775 - Amplifier: An amplifier includes a first amplifier stage, a second amplifier stage and an output stage. The output stage is driven in response to a first signal and a second signal to provide an output signal. The first amplifier stage provides the first signal in response to an indication of the... Agent: Trop Pruner & Hu, PC

20070075777 - Device and method of eliminating dc offset: A DC offset elimination device includes a first signal path that delivers a differential input signal pair from an input node to an output node and a second signal path that delivers a differential output signal pair from the output node to the input node. The second signal path includes... Agent: F. Chau & Associates, LLC

20070075776 - Output driver with common mode feedback: A complementary metal-oxide semiconductor output driver provides a differential output signal having a particular differential voltage swing and a particular common mode voltage to a differential output node for various types of load circuits coupled to the differential output node. The load circuit may have any impedance within a particular... Agent: Zagorin O'brien Graham LLP

20070075778 - Amplifier systems with low-noise, constant-transconductance bias generators: Amplifier systems are provided with bias generators that substantially stabilize operating points of system parameters (e.g., drain current and transconductance) over PVT variations, substantially reduce body effects and Early effects, and substantially reduce system output noise. These advantages are realized without significantly increasing system size and/or power consumption.... Agent: Koppel, Patrick & Heybl

20070075779 - Common gate with resistive feed-through low noise amplifier: A radio-frequency amplifier is provided. The radio-frequency amplifier includes a transistor having an input terminal, an output terminal, a control terminal, and a transconductance gm. A series-connected feed-through resistance Rf and feed-through capacitance Cf is connected in parallel with the input terminal and the output terminal of the transistor. A... Agent: Mr. Christopher John Rourk Jackson Walker LLP

20070075780 - Apparatus and method for adaptive biasing of a doherty amplifier: An apparatus and method for adaptive biasing of a Doherty amplifier (102) is disclosed. The apparatus includes a carrier amplifier (210), a peaking amplifier (214), a carrier amplifier bias circuit (208) and a peaking amplifier bias circuit (212), all integrated onto a single chip. The method includes dividing an input... Agent: Motorola, Inc.

20070075781 - Power amplifier system provided with improved protection function: The present invention provides a power amplifier system that includes a power terminal, a ground terminal, an output terminal, a ripple terminal, a control terminal, a power amplifier circuit connected between the power terminal and the ground terminal, a negative potential detection circuit connected to the output terminal, a bias... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070075782 - Radio frequency power amplifier circuit: A radio frequency power amplifier, having a first amplifying transistor 103-1 and a second amplifying transistor 103-2, comprises a detection circuit 101 that detects an output power and outputs a voltage according to the output power, and a protection transistor 102, controlled by an output of the detection circuit 101,... Agent: Mcginn Intellectual Property Law Group, PLLC

20070075783 - Handset radiofrequency front end module in fine pitch quad flat no lead (fqfp-n) package: An apparatus and method for transmitting signal, the apparatus comprising a front end telecommunications module including a power amplifier, a matching circuit coupled to the power amplifier, and a filter coupled to the matching circuit, such that a signal received by the power amplifier is transmitted to the filter through... Agent: Tyco Technology Resources

20070075784 - Radio frequency power amplifier: The present invention relates to a cascode radio frequency power amplifier, including at least two cascaded MOS transistors formed in a mutual substrate, where the bulk nodes of the transistors are isolated from each other and connected to the respective source of each transistor. The present invention also teaches that... Agent: Eschweiler & Associates, LLC National City Bank Building