Amplifiers inventions 12/08

20080315944 - Spatially-fed high power amplifier with shaped reflectors: A spatially-fed high-power amplifier comprises one or more shaped reflectors to reflect an initial wavefront, and an active array amplifier to amplify the reflected wavefront to generate a high-power planar wavefront. The shaped reflectors provide the reflected wavefront with substantially uniform amplitude when incident on the active array amplifier. The... Agent: Schwegman, Lundberg & Woessner, P.A.

20080315945 - Arrangement for amplifying a pwm input signal: A pulse-width modulation (PWM) amplifier comprises a feedback loop for reshaping the pulses of the PWM input signal to correct timing and amplitude errors in the class D output stage of the amplifier by means of an error correction signal. In such an amplifier the feedback loop gives a substantial... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080315946 - Combiner-less multiple input single output (miso) amplification with blended control: Multiple-Input-Single-Output (MISO) amplification and associated VPA control algorithms are provided herein. According to embodiments of the present invention, MISO amplifiers driven by VPA control algorithms outperform conventional outphasing amplifiers, including cascades of separate branch amplifiers using conventional power combiner technologies. MISO amplifiers can be operated at enhanced efficiencies over the... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20080315947 - Controller-assisted method and controller-assisted device for determining a characteristic of a compensation member in a level control circuit: In a controller-assisted device for determining a characteristic of a compensation element in a level control circuit, the compensation element is serially mounted inside the level control circuit for a high-frequency signal (S<SB>HF</SB>) in a signal channel with respect to said signal channel. The characteristic of the compensation element has... Agent: Marshall, Gerstein & Borun LLP

20080315948 - Circuit architecture having differential processing for use in half bridges and full bridges and methods therefore: Circuit architecture is disclosed that includes one or more half bridges, the one or more half bridges including signal processing circuitry including first and second inputs and one or more outputs. The circuit architecture also includes a driver stage coupled to the one or more outputs of the signal processing... Agent: Harrington & Smith, PC

20080315950 - Integrated circuit amplifiers having switch circuits therein that provide reduced 1/f noise: Integrated circuit devices include a pair of field effect transistors having shared source terminals, shared drain terminals and shared gate terminals, which may be treated herein as being electrically coupled in parallel. A switch circuit is also provided, which is configured to drive a body terminal of a first one... Agent: Myers Bigel Sibley & Sajovec

20080315949 - Variable gain amplifier insensitive to process voltage and temperature variations: An improved VGA design offering a purely ratiometric mechanism for controlling gain by current-steering. A control loop delivers a reference voltage to a control amplifier that steers current and match the common mode output voltage (CMOV) with said predefined reference voltage. The VGA is designed so that, although the absolute... Agent: Fleit Gibbons Gutman Bongini & Bianco Pl

20080315951 - Class ab differential amplifier with output stage common mode feedback: A differential amplifier includes an output stage, a first common mode feedback circuit; and a current source. The output stage includes first and second complimentary output terminals. The first common mode feedback circuit is operable to determine an average voltage across the first and second complimentary output terminals. The current... Agent: Dorsey & Whitney LLP Intellectual Property Department

20080315952 - Power amplifier system provided with improved protection function: A power amplifier system including a power terminal, a ground terminal, an output terminal, a ripple terminal, a control terminal to which a control signal is supplied from outside, a power amplifier circuit connected between the power terminal and the ground terminal, a negative potential detection circuit connected to the... Agent: Oblon, Spivak, Mcclelland Maier & Neustadt, P.C.

20080315953 - Variable gain mixer: Accordingly, by integrating the variable gain amplifiers into the mixers, a gain change can be obtained at a low source voltage in a wide range without connecting a number of variable gain amplifiers. In addition, by properly applying the LO signals used in the mixers, the gain change can have... Agent: Cantor Colburn, LLP

20080315955 - Class l amplifier: A new Class L amplifier which dynamically switches between multiple pairs of power rails, and has the ability to select the most advantageous combination of rails for the minimization of power dissipation in the amplifier. In one embodiment, a bridged amplifier system includes two Class L amplifiers to drive a... Agent: Townsend And Townsend And Crew, LLP

20080315954 - Integrated power amplifier: Methods to implement low cost, high efficiency, low loss power combiner with novel matching circuits are disclosed. A narrow band power combiner enables a high power and high efficiency radio frequency power amplifier to be realized using multiple low voltage CMOS transistors or micro power amplifiers. The power combiner may... Agent: Texas Instruments Incorporated

20080315956 - Saturation handling: Saturation handling for preventing a power amplifier from going into a saturation condition is disclosed.... Agent: Lee & Hayes, PLLC

20080315957 - Ultra-wideband low noise amplifier and amplification method thereof: An ultra wideband low noise amplifier (UWB LNA) and amplification method thereof, providing a substantially achieved bandwidth extension by pole-zero cancellation and utilized to transform input impedance matching up to 50 ohm for gaining low noise figure. The ultra-wideband low noise amplifier is composed of a capacitive-feedback amplifier, a resistive-feedback... Agent: Rabin & Berdo, PC

20080309404 - Single-ended amplifier: In an amplifier arrangement comprising an amplifier (AO) having an output, a first feedback (Rfb) between the output and an input side of the amplifier, a load (RL) having a first terminal coupled to the output and a second terminal, and a DC-blocking capacitance (CDC) between the second terminal of... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080309405 - Power amplifier pre-distortion: The present invention is directed to systems and methods for reducing the distortion of power amplifiers. In particular, methods and systems are described that enable a determination of a pre-distortion correction signal to be determined, which when added to the nominal signal, a reduction in the distortion of the power... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20080309406 - Full-bridge class-d power amplifier: The present invention relates to a full bridge class-D amplifier where one of the output terminals (27) is grounded, and which is arranged to be supplied by a floating power supply (1). Each amplifier switching leg (7, 15) is connected to the corresponding load terminal (25, 27) via a low-pass... Agent: Thorne & Halajian Applied Technology Center

20080309409 - Balanced differential cross-coupled transconductance amplifier for a multiplexor: A balanced, differential, cross-coupled amplifier including an input stage for receiving a differential input and including an input transconductance differential pair and a feedback transconductance differential pair; and an output stage responsive to the input stage for providing a differential output; the differential input being connected to one input of... Agent: Iandiorio & Teska

20080309410 - Offset fixing operational amplifier circuit: In an offset fixing operational amplifier circuit, an operational amplifier circuit includes an input stage containing a first constant current source, a second constant current source, a first differential pair and a second differential pair. A bias circuit supplies a bias voltage to the operational amplifier circuit. An offset fixing... Agent: Mcdermott Will & Emery LLP

20080309411 - Radio frequency signal amplifying device: There is provided a radio frequency (RF) signal amplifying device consuming less power and operable at a high voltage in a PA driving amplifying apparatus applicable to a PA amplifying circuit which amplifies power of an RF signal. The RF signal amplifying device includes: a balun converting an unbalanced radio... Agent: Lowe Hauptman Ham & Berner, LLP

20080309408 - Symmetrical differential amplifier: A differential amplifier has improved power efficiency, reduced offset penalty and a symmetrical output differential signal. Such a differential amplifier may include: (a) a bias circuit that has a first input device and a second input device; (b) a first load device and a second load device, each biased by... Agent: Brooks Kushman P.C. / Sun / Stk

20080309407 - Transimpedance amplifier: A gain switching determination circuit (250) compares/determines a comparative input voltage (Vc) from an inter-stage buffer (230) with a first hysteresis characteristic, and outputs a gain switching signal (SEL) based on the comparison/determination result to first and second transimpedance amplifier core circuits (210, 220), thereby switching the gains of the... Agent: Blakely Sokoloff Taylor & Zafman LLP

20080309412 - Organic field effect transistor systems and methods: An OFET includes a ferroelectric gate dielectric permitting electrical reprogramming, such as to implement an electrically re-programmable array logic (PAL) or a field-programmable gate array (FPGA). Methods of constructing such an OFET, PAL, or FPGA, can including roll printing. An OFET on a piezoelectric substrate provides local amplification in an... Agent: Schwegman, Lundberg & Woessner, P.A.

20080309413 - Gain switching low-noise amplifier circuit: In a gain switching LNA including a first transistor, a first transistor group (for example, second to ninth transistors) and a second transistor group (for example, tenth to seventeenth transistors), a first resistor connected between an emitter of the tenth transistor and a collector of the first transistor and a... Agent: Mattingly, Stanger, Malur & Brundidge, P.C.

20080303590 - Power amplifier with noise shaping function: A power amplifier with noise shaping function is provided. The power amplifier includes a differential mode integrator, an integration and adjustment unit and a switch unit. The differential mode integrator is used for receiving a differential mode input signal and a differential mode output signal, and outputting a differential mode... Agent: Jianq Chyun Intellectual Property Office

20080303591 - Amplifying circuit and associated linearity improving method: An amplifying circuit and an associated linearity improving method are provided to correct the AM to PM distortion of an amplifier, thereby improving the amplifier linearity. The amplifying circuit includes an amplifier and a correcting unit. The amplifier has a non-linear input capacitor. The correcting unit generates a correction signal... Agent: Ipr Works, LLC

20080303592 - Differential amplifier circuit and a/d converter: PMOS transistors are interposed parallel to each other between a node, which is a first output part, and a power supply; and PMOS transistors are interposed in parallel to each other between a node, which is a second output part, and the power supply. Output voltages in time of a... Agent: Mcdermott Will & Emery LLP

20080303594 - Amplifier circuit: There is provided an amplifier circuit including a plurality of unit amplifiers connected in parallel to an input signal terminal, wherein each of the unit amplifiers includes: a first switch switching an input signal inputted from the input signal terminal; a first field effect transistor having a gate connected to... Agent: Arent Fox LLP

20080303595 - Amplifying circuit: An amplifier includes: a class AB input stage, receiving an input signal, for generating an inner signal according to the input signal; class AB output stage, includes: a biasing circuit, for providing a first voltage and a second voltage according to the inner signal; and an output stage, for generating... Agent: Muncy, Geissler, Olds & Lowe, PLLC

20080303593 - Mugfet circuit for increasing output resistance: In an embodiment, an apparatus includes a MuGFET device coupled to a reference source, the MuGFET device configured to receive an input signal at a gate thereof; and Also includes a further MuGFET device coupled between the MuGFET device and a first terminal of a load, a second terminal of... Agent: Schwegman, Lundberg & Woessner / Infineon

20080303596 - Amplifier circuit having an output transistor for driving a complex load: An amplifier circuit is disclosed having an output transistor for driving a complex load over a drive frequency range, wherein in the lower part of the range an inductive component of the load dominates and in the upper part the inductive component does not dominate. The amplifier circuit includes a... Agent: Eschweiler & Associates LLC

20080303597 - Semiconductor circuit: There are included a Wilkinson divider/combiner dividing an input signal, amplifying elements amplifying outputs of the Wilkinson divider/combiner, and a Wilkinson divider/combiner combining outputs of respective amplifying elements. A variable capacitor element is connected to a branch point of a signal transmission path in the Wilkinson divider/combiner. A capacitance value... Agent: Arent Fox LLP

20080303598 - Circuit and method for reducing bias noise in amplifier circuits: An amplifier circuit and method for reducing bias noise is disclosed. The amplifier circuit includes a passive biasing source for supplying a desired bias signal to the amplifier and an active biasing source for energizing the passive biasing source to supply the desired bias signal. The amplifier circuit also includes... Agent: General Electric Company Global Research

20080297243 - Linear programmable switch-capacitance gain amplifier: A linear programmable switch-capacitance gain amplifier (PGA) is described. The PGA divides the dB-gain curve into several parts by the concept of piece-wise linearity, and then simultaneously executes the dB-linear gain adjustment of MSB and the LSB at the same gain stage. Present invention achieves the PGA dB-linearity by setting... Agent: Rosenberg, Klein & Lee

20080297244 - Pwm loop filter with minimum aliasing error: One embodiment of an apparatus for filtering an electrical signal includes a loop filter with an input and an output that applies a transfer function to a signal at the input. The transfer function has substantially no real part. The loop filter has a dominant pole placed substantially at or... Agent: Texas Instruments Incorporated

20080297245 - Delay modulator pre-distortion circuit for an amplifier: A circuit for pre-distorting a signal input to an amplifier includes a signal divider operable for dividing an input signal into signal portions that travel in a primary path and a secondary path. A delay element in each of the primary and secondary paths introduces a group delay to the... Agent: Wood, Herron & Evans, LLP

20080297246 - Polar amplifier: An amplifier circuit receives a phase modulated signal at an input node. The power supply terminal of the amplifier circuit is modulated in accordance with an amplitude envelope signal. The voltage on the power supply terminal is modulated using one or more linear regulators depending on the magnitude of the... Agent: Lemoine Patent Services, PLLC

20080297247 - Method and apparatus for distortion correction of rf amplifiers: A method of reducing distortion in the output of an amplifier is provided. The method comprises subtractively combining an error signals with the appropriate phase shift with input signals to be amplified. The error signal being generated by subtractively combining a fed-forward portion of the input signal with a portion... Agent: Freedman & Associates

20080297248 - Class d amplifier circuit with bi-directional power switch: A Class D amplifier circuit in accordance with an embodiment of the present application includes a converter stage operable to provide a desired AC voltage and a Class D amplifier stage, connected to the converter stage. The Class D amplifier stage includes a first bi-directional switch connected to the converter... Agent: Ostrolenk Faber Gerb & Soffen

20080297249 - Cmos amplifiers with frequency compensating capacitors: The frequency and transient responses of a CMOS differential amplifier are improved by employing one or more compensating capacitors. A compensating capacitor coupled to a differential input of the CMOS differential amplifier is used to inject current into the differential input, such that the net current flow through the gate-to-drain... Agent: Schwegman, Lundberg & Woessner/micron

20080297251 - Digitally adjusted variable gain amplifier (vga) using switchable differential pairs: A variable gain amplifier including a stage. The stage having a set of switchable differential pairs. The stage providing a gain range to a signal and adjusting a gain of the signal. At least one differential pair in each stage is permanently enabled. The variable gain amplifier may include a... Agent: Brake Hughes Bellermann LLP C/o Intellevate

20080297250 - Integrated circuit system for controlling amplifier gain: An integrated circuit system comprising: forming a differential amplifier including: forming a first transistor, coupling a second transistor to the first transistor in a high gain configuration, and coupling a third transistor, having a low gain configuration, in parallel with the second transistor; and adjusting a gain of the differential... Agent: Law Offices Of Mikio Ishimaru

20080297252 - Differential signal generator circuit: A differential signal generator circuit includes: a first amplifier for comparing an input signal with a threshold voltage and outputting differential signals; and a second amplifier for adjusting the threshold voltage in response to the differential signals. The second amplifier includes: a first transistor and a second transistor forming a... Agent: Leydig Voit & Mayer, Ltd

20080297253 - single-ended gain stage and disk drive: An electrical apparatus comprising an amplifier having a first input, a second input, and an output. The apparatus further comprises a first electrical path coupled to the first input and having a first resistance and a first electrical path coupled to the second input and having a second resistance. The... Agent: Texas Instruments Incorporated

20080297254 - Class ab amplifier: A class AB amplifier includes: a voltage amplifier stage operating off a first source voltage, and amplifying a differential input voltage to produce a first amplified voltage; a level shift stage coupled to the voltage amplifier stage and adjusting a direct current level of the first amplified voltage to produce... Agent: Mcnees Wallace & Nurick LLC

20080297255 - Receiver comprising an amplifier: The invention relates to a receiver (1) comprising an amplifier (31-34) for amplifying an antenna signal, which amplifier (31-34) comprises an amplifier input (11a) and an amplifier output (12a, 12b), the amplifier input (11a) being a single ended input for receiving the antenna signal, the amplifier output (12a, 12b) being... Agent: Nxp, B.v. Nxp Intellectual Property Department

20080297257 - Amplifier: The amplifier comprises an inverting negative feedback amplifier circuit using an operational amplifier, a comparator for comparing the potential of the negative phase input terminal of the operational amplifier with the reference potential Vref of the comparator, and a low-pass filter. The imaginary short state of the operational amplifier is... Agent: Pillsbury Winthrop Shaw Pittman LLP

20080297256 - Rf detector with crest factor measurement: An RF detector configured to provide two outputs, one being a function of the true RMS power level of an RF input signal, and the other being a function of the instantaneous/peak power of the RF input signal, normalized to the average power level. The RF detector includes a variable... Agent: Lowrie, Lando & Anastasi, LLP

20080297258 - Variable impedance circuit; and variable impedance system, filter circuit, amplifier, and communication system using the same: A first transistor includes: a first terminal that receives one of differential input signals; a second terminal that receives a control signal for varying an impedance; a third terminal connected to the second transistor; and a fourth terminal that supplies a potential to a substrate. A second transistor includes: a... Agent: Mcdermott Will & Emery LLP

20080297259 - Configurable, variable gain lna for multi-band rf receiver: A configurable LNA architecture for a multi-band RF receiver front end comprises a bank of LNAs, each optimized to a different frequency band, wherein each LNA has a configurable topology. Each LNA comprises a plurality of amplifier stages, each stage including an RF transistor having a different width. The transistor... Agent: Coats & Bennett, PLLC

20080297260 - Radio-frequency power amplifier: A radio-frequency power amplifier for preventing a final-stage HBT from being destroyed is provided. To this end, a radio-frequency multistage power amplifier of the present invention includes: a first amplification stage having a first hetero bipolar transistor of which collector output is detected; a second amplification stage which is prior... Agent: Mcdermott Will & Emery LLP

20080297261 - Circuits and methods for implementing transformer-coupled amplifiers at millimeter wave frequencies: Circuits and methods are provided for building integrated transformer-coupled amplifiers with on-chip transformers that are designed to resonate or otherwise tune parasitic capacitances to achieve frequency tuning of amplifiers at millimeter wave operating frequencies.... Agent: Frank Chau, Esq. F. Chau & Associates, LLC

20080297262 - Increased gain high-frequency amplifier: In general, in one aspect, the disclosure describes an amplifier that includes a first transistor coupled to ground and a second transistor coupled to the first transistor and a supply voltage. A voltage biasing circuit is used to provide biased voltages to the first and second transistors. An inductor coupled... Agent: RyderIPLaw C/o Intellevate, LLC