Amplifiers inventions 05/07

20070120595 - Increasing the common mode range of a circuit: Increasing the input common-mode range of a circuit which accepts differential signals as inputs. Such an increase may be attained by correcting an input signal at continuous levels or at 2 or more discrete levels) without changing the strength represented by the input signal. In an embodiment, the common-mode component... Agent: Texas Instruments Incorporated

20070120596 - Method and apparatus for outputting audio signal: A method and an apparatus for outputting an audio signal are provided. The apparatus includes a power source; a compensator for compensating an input signal by adding the input signal to an offset value reciprocally proportional to a source voltage; a pulse width modulator for modulating an audio signal transmitted... Agent: Verizon Patent Management Group

20070120597 - Amplifying circuit: In an amplifying circuit, a first and a second switches are provided between an input terminal and output terminal of coupling capacitor and amplifier, and these switches are set in OFF state in a power-down state, and the second switch is turned on for a specified period when changed over... Agent: Volentine Francos, & Whitt PLLC

20070120598 - Three phase rectifier circuit with virtual neutral: A rectifier circuit powers three power conversion modules using a three phase AC input without a neutral connection. The rectifier circuit includes a first bridge rectifier that is connected to a first phase of the three phase AC input and that produces a first rectified waveform. A second bridge rectifier... Agent: Harness, Dickey & Pierce, P.L.C

20070120599 - Multi-operational amplifier system: A multi-operational amplifier system comprises a plurality of operational amplifiers and a controller to configure the plurality of operational amplifiers. The operational amplifiers may be selectively configured to operate individually or in combination with other of the operational amplifiers. The operational amplifiers may have different common node inputs. In one... Agent: Dla Piper Rudnick Gray Cary Us, LLP

20070120600 - Replica bias circuit: Provided is a replica bias circuit which is suitable for multi-layer stacked CMOS current mode logic (CML) and is stably used in application fields using a low power supply voltage. The replica bias circuit applies a reference voltage to gates of target transistors constituting an electronic circuit. The replica bias... Agent: Ladas & Parry LLP

20070120601 - Rf variable gain amplifier: A RF variable gain amplifier with an extended linear tuning range is disclosed. The variable gain amplifier employs a wide swing cascode mirror formed by two cascode transistors and two gain transistors. The two cascode transistors track each other, so are the two gain transistor. The gain transistors operate on... Agent: Carlton Fields, Pa

20070120602 - Variable gain power amplifier: A variable gain power amplifier includes a power amplifying unit and a signal generating unit. The power amplifying unit includes a control terminal, and a gain of the power amplifying unit is variable by a control signal provided through the control terminal. The signal generating unit generates the control signal... Agent: Sughrue Mion, PLLC

20070120603 - Techniques for designing wide band low noise amplifiers: A wideband amplifier having an amplifier input terminal and an amplifier output terminal includes at least one transistor coupled to the amplifier input terminal and an impedance element coupled between the amplifier input terminal and the amplifier output terminal. A feedback signal is transmitted between the amplifier output terminal and... Agent: Caesar, Rivise, Bernstein, Cohen & Pokotilow, Ltd.

20070120604 - Low voltage low power class a/b output stage: A CMOS class A/B output stage provides the advantages of high speed operation, low supply voltage requirements, and low quiescent current draw, resulting from the use of subthreshold biasing of the output driver transistors. The architecture of the output stage makes it particularly suitable for use in operational amplifiers in... Agent: Freescale Semiconductor, Inc. Law Department

20070120605 - Integrated switchless programmable attenuator and low noise amplifier: An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers... Agent: Sterne, Kessler, Goldstein & Fox P.l.l.c.

20070120607 - Active filter for reduction of common mode current: An active filter for reducing the common mode current in a pulse width modulated drive circuit driving a load said drive circuit comprising an a-c source, a rectifier connected to said a-c source and producing a rectified output voltage connected to a positive d-c bus and a negative d-c bus,... Agent: Ostrolenk Faber Gerb & Soffen

20070120606 - Base station power amplifier for memory effect minimization: A base station power amplifier for minimizing memory effect is provided. The power amplifier includes a bias circuit which supplies a direct current (DC) power to a transistor; the transistor which amplifies the DC power provided from the bias circuit; a matching circuit which transfers maximum power to a load... Agent: Dilworth & Barrese, LLP

20070115047 - Differential amplifier arrangement: A differential amplifier arrangement (53) comprising an input stage (1) and an output stage (2) is described. The input stage (1) comprises a differential amplifier (3, 4) to which an offset compensation stage (10) is connected, which comprises at least one controllable current source (11) and which controls a bias... Agent: Fish & Richardson PC

20070115048 - Equalizers and offset control: In some embodiments, equalizer circuits with controllably variable offsets at their outputs are provided.... Agent: Intel Corporation C/o Intellevate, LLC

20070115049 - Operational amplifier and related noise separation method thereof: An amplifier includes: an input stage for receiving an input signal to generate a first signal corresponding to a first band; a first modulator coupled to the input stage for modulating the first signal to generate a second signal corresponding to a second band; an amplifier stage coupled to the... Agent: North America Intellectual Property Corporation

20070115050 - Circuit configuration having a feedback, fully-differential operational amplifier: The present invention relates to a circuit configuration having a feedback operational amplifier (AMP), which is implemented as fully differential, for amplifying an input signal differentially input to the circuit configuration and for outputting the amplified input signal as a differential output signal. In order to increase the freedom in... Agent: Pearne & Gordon LLP

20070115051 - Nested transimpedance amplifier: A transimpedance amplifier comprises a first operational amplifier having an input and an output. A second operational amplifier has an input and an output that communicates with the input of the first operational amplifier. A first feedback element has one end that communicates with the input of the first operational... Agent: Harness, Dickey & Pierce P.L.C

20070115052 - Amplifiers with compensation: An amplifier circuit comprises a first amplifier having an input and an output. A second amplifier has an input that communicates with an output of the first amplifier. A third amplifier has an input that communicates with an input of the first amplifier. A fourth amplifier has an input that... Agent: Harness, Dickey & Pierce P.L.C

20070115053 - Method and arrangement for optimizing efficiency of a power amplifier: The invention relates to optimizing the efficiency of a power amplifier of a transmitter. The objectives of the invention are achieved with a solution in which a voltage level of an output signal of an amplifier stage (301, 302) is detected (305, 306) at a signal output of each amplifier... Agent: Ware Fressola Van Der Sluys & Adolphson, LLP

20070115054 - Miniature dual band power amplifier with reserved pins: A radio frequency (RF) module provides first and second power amplifiers configured to produce first and second amplified RF signals at first and second output RF terminals, respectively; and first and second arrays of pads positioned opposite each other, the first array including the first output RF terminal and the... Agent: Tran & Associates

20070115055 - Method and apparatus for implementing soft switching in a class d amplifier: The present invention provides lossless switching by configuring the output inductor so that the ripple current amplitude at load conditions results in small negative current during switching. The reconfigured output inductor results in increased ripple current amplitude. This increased ripple amplitude may be further controlled using zero ripple steering techniques... Agent: The Hecker Law Group

20070115056 - Operational amplifier and scanning electron microscope using the same: An operational amplifier and a scanning electron microscope which are capable of dealing with high voltage and large current, and which allow implementation of stable and precise amplification, the operational amplifier having a first-stage amplification unit including a differential pair, a base-grounded amplification circuit, and an active load, the base-grounded... Agent: Mcdermott Will & Emery LLP

20070115058 - Variable gain amplifier having linear-in-decibel transconductance: A variable gain amplifier includes a variable resistor, a first MOS transistor and a second MOS transistor. The variable resistor has one end coupled to a ground. The first MOS transistor with transconductance 2 gm amplifies a first differential input signal to provide a first current between an output node... Agent: Mills & Onello LLP

20070115057 - Variable gain device: A variable gain device having higher linearity and wider gain range is provided. The variable gain device includes a transduction unit for generating an output current, a control unit for adjusting the current gain of the gain amplifying unit according to a gain control signal, a gain amplifying unit receiving... Agent: Jianq Chyun Intellectual Property Office

20070115059 - Analog signal processing circuit: an analog signal processing block with differential signal inputs and including a differential amplifier with differential inputs is disclosed which is configurable to operate either in a differential output mode or in a single-ended output mode without affecting the desired frequency and time characteristics as determined by the switched capacitor... Agent: Texas Instruments Incorporated

20070115060 - Power conversion regulator with exponentiating feedback loop: A feedback control loop around a gain element controls the output signal of said gain element responsive to an input or reference signal, and is additionally responsive to a non-linear feedback signal. The feedback loop of this invention comprises computation means for exponentiating a signal representing the output of the... Agent: Rudoler & Derosa LLC Attn: Docket Clerk

20070115061 - Device for voltage-noise rejection and fast start-up: A device for voltage-noise rejection and fast start-up is provided. It comprises a low-pass filter connected to a voltage source, a voltage-controlled switch connected in parallel with the low-pass filter, and an auxiliary start-up element connected to a DC-only voltage output. By using a transistor operating in the triode region... Agent: Lin & Associates Intellectual Property

20070115062 - Bias circuit for power amplifier operated by a low external reference voltage: A bias circuit includes a resistor in parallel with a voltage-drive bias circuit including GaAs-HBT transistor. This configuration ensures that a current can be supplied from a reference voltage input terminal to the base terminal of a first transistor via the resistor in an idling state in which a voltage... Agent: Leydig Voit & Mayer, Ltd

20070115064 - Power amplifying device comprising a stabilizing circuit: A power amplifying device includes a stabilizing circuit between an input terminal and an amplifier. The stabilizing circuit has a first line, a second line, and a third line. The first line is connected to the ground. The length of the first line is equal to or longer than three... Agent: Leydig Voit & Mayer, Ltd

20070115063 - Resonant amplifier: A resonant amplifier is provided. A resonant inductor is connected in series between a source (emitter) of a common gate (base) transistor and an input point (i.e. output point of previous stage), and a resonant capacitor is connected between the input point and a ground or a voltage source connected... Agent: Harness, Dickey & Pierce, P.L.C

20070115065 - Stabilization circuit and multiband amplification circuit: A stabilization circuit 100 which comprises: serial stabilization blocks 110, 120 connected in series, with respect to a signal to be amplified, with an amplification element; parallel stabilization blocks 130, 140 connected in parallel with the amplification element, with respect to a signal to be amplified; and a switch parts... Agent: Oblon, Spivak, Mcclelland, Maier & Neustadt, P.C.

20070115067 - Output amplifier structure with bias compensation: In one embodiment, an output transistor and a bias compensation device are placed in proximity to each other on the same package substrate. The bias compensation device is electrically isolated but thermally coupled to the output transistor, and is configured to provide a output signal for adjusting bias to the... Agent: Semiconductor Components Industries, LLC Bradley J. Botsch

20070115066 - Radio-frequency amplifier and radio-frequency wireless communication apparatus: A radio-frequency amplifier having an input-side line portion and an output-side line portion including an input slot line and an output slot line extending in parallel formed on a substrate. In a connecting portion of a transistor, a gate electrode G, a drain electrode D, and source electrodes S are... Agent: Dickstein Shapiro LLP

20070115068 - Method and apparatus for generating an optimized reference current threshold: In one embodiment, apparatus is provided with current optimization logic, a programmable current source for generating a reference current threshold, and current programming logic. In response to a plurality of input pulses received by a first TIA, the current optimization logic produces a series of digitized current values in response... Agent: Avago Technologies, Ltd.

20070109042 - Measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit: A measuring circuit for the output of a power amplifier and a power amplifier comprising the measuring circuit comprises a first transistor (4f). The output current (27) of the first transistor (4f) is characteristic of the output current (28) of the amplifier (20), in particular, the above is essentially proportional... Agent: Baker Botts, L.L.P.

20070109043 - Operational amplifier with zero offset: A circuit for minimizing a voltage offset between inverting and non-inverting input terminals of an operational amplifier circuit is provided. The circuit includes a chopper circuit connected to the inverting and non-inverting input terminals of the operational amplifier circuit, the chopper circuit including: an amplifier having differential outputs; and a... Agent: Ostrolenk Faber Gerb & Soffen

20070109044 - Power conversion system: A power conversion system comprising at least one Pulse Modulated Amplifier (1), including a pulse modulator for generating a pulse modulated signal based on a reference input (vi), a switching power stage arranged to amplify the pulse modulated signal, and a control system arranged to compensate for power supply voltage... Agent: Harness, Dickey & Pierce, P.L.C

20070109045 - Power amplifying apparatus: A power amplifying apparatus has: a signal converting section (20) which converts an input signal of an orthogonal coordinate system to an amplitude signal and phase signal of a polar coordinate system, which then converts the phase signal to an orthogonal-coordinate phase signal of the orthogonal coordinate system, and which... Agent: Pearne & Gordon LLP

20070109046 - Distortrion/efficiency adaptation in a variable-data-rate radio transmitter: The present invention generally speaking, provides for adaptive control of an RF power amplifier in view of a desired data rate. For low data rates, the RF amplifier (121) is controlled so as to allow significant output signal distortion, at the same time operating within a region of increased efficiency... Agent: Philips Electronics North America Corporation Intellectual Property & Standards

20070109047 - Selecting samples for amplifier digital predistortion estimation: The present invention provides a method for selecting samples for digital amplifier predistortion estimation. The method may include accessing a plurality of samples. Each sample includes information associated with an input signal and a corresponding output signal of the amplifier. The method may also include selecting a subset of the... Agent: Williams, Morgan & Amerson

20070109048 - Class d amplifier and infrared data receiving apparatus using the same: A class D amplifier includes: an amplifier circuit in which a high side switching element and a low side switching element are connected in series between power sources; a high side gate driving circuit for driving a high side gate of the high side switching element; and a low side... Agent: Birch Stewart Kolasch & Birch

20070109049 - Filterless class d power amplifier: A double reference wave modulation scheme for filterless power amplifiers is disclosed for reducing EMI. In the filterless power amplifier, differential outputs for driving load impedance are corrected based on input audio signals by the error amplifier. Reference wave generators generate reference waves. Comparators are responsive to the reference waves... Agent: Jianq Chyun Intellectual Property Office

20070109050 - Power supply rejection for pulse width modulated amplifiers and automatic gain control: A circuit according to the present invention improves the power supply rejection ratio for a pulse width modulated digital amplifier and can be used as a compressor and/or limiter, either in conjunction with an amplifier or independently. The circuit preferably operates by using voltage level translation to vary the amplitude... Agent: Adam B. Landa Greenberg Traurig

20070109051 - High-bandwidth high-gain amplifier: A pipelined analog to digital converter includes a first stage that receives an input voltage, that generates a first sampled digital value and a first residue voltage, and that includes a first amplifier that amplifies the first residue voltage and generates a first amplified residue voltage. A second stage receives... Agent: Harness, Dickey & Pierce P.L.C

20070109052 - Class ab enhanced transconductance source follower: A low voltage, high bandwidth, enhanced transconductance, source follower circuit constructed from MOS FET devices, which operates in a class AB mode. The drain current of the source follower is sensed with a folded cascode device. The sensed current is multiplied by a common source device of same type (NMOS... Agent: Synnestvedt & Lechner LLP-agere

20070109053 - Method and circuit for controlling amplification: This invention relates to a method for controlling an amplification within a receiver. The gain of a variable gain amplifier which amplifies an input signal to obtain a gain-controlled signal is set. Said gain controlled signal is analog-to-digital converted. Thereby digital words are generated. Each digital word has a value... Agent: Edwards & Angell, LLP

20070109054 - Signal amplification through an electromagnetic device: The present invention uses an electromagnetic device for amplifying an input signal without the use of amplifiers, power supplies, and inverter/converter circuits. The present invention routes an input signal through an electromagnetic device for amplification of the input signal for later use by various loads.... Agent: Peter Ganjian

20070109055 - Soft saturation detection for power amplifiers: A soft saturation detection circuit for a radio frequency (“RF”) power amplifier is configured to detect the onset of soft saturation in an unambiguous and accurate manner. The circuit compares the time derivative of a voltage signal indicative of the RF output power to the time derivative of a control... Agent: Ingrassia, Fisher & Lorenz, P.C.

20070109056 - Amplifier circuit, and system incorporating same: In one embodiment, a current source circuit having a reference resistor produces first, second and third bias currents that vary with manufacturing variances of the current compensation resistor. An input amplification stage includes a transconductance stage biased by the first bias current, a first transimpedance amplifier (TIA) biased by the... Agent: Agilent Technologies Inc.

20070109057 - Amplifiers with compensation: An amplifier system includes a first amplifier, a second amplifier, a first capacitance, and a first transistor. The first amplifier has an input and an output. The second amplifier has an input that communicates with the output of the first amplifier. The first capacitance has one end that communicates with... Agent: Harness, Dickey & Pierce P.L.C

20070103230 - Method and system for creating a spectral null in a switching amplifier: A method and system for creating a spectral null in a switching amplifier system is provided. The method includes receiving an input signal in a first modulated form at an input stage 104 of the amplifier. The method further includes converting the input signal to a second modulated form. The... Agent: Motorola, Inc.

20070103231 - Nested transimpendance amplifier: A differential transimpedance amplifier circuit comprises a first operational amplifier having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A second operational amplifier has a second inverting input, a second non-inverting input, a second inverting output and a second non-inverting output.... Agent: Harness, Dickey & Pierce P.L.C

20070103232 - Operational amplifier: An operational amplifier is described. The operational amplifier includes a first stage, a second stage, a third stage, and a fourth stage. The amplifier includes a nested transconductance-capacitance compensation configuration. The third stage includes class AB control mechanism. The fourth stage includes a class AB output stage.... Agent: Avago Technologies, Ltd.

20070103233 - Apparatus for optimizing gate bias of radio frequency amplifier and method thereof: Disclosed is an apparatus for maintaining the linearity of a Radio Frequency amplifier that includes a coupler for coupling a signal input to a power amplifier, a gate bias controller for determining the a coupled signal level to determine a gate bias voltage in accordance with the signal level, and... Agent: The Farrell Law Firm

20070103234 - Class d amplifier: A class D amplifier includes: an amplifier that generates a digital signal for driving a load based on an input signal; an attenuator that attenuates the input signal according to an attenuation command signal; and a clip prevention controller that outputs the attenuation command signal to intermittently attenuate the input... Agent: Pillsbury Winthrop Shaw Pittman LLP

20070103235 - Inductorless broadband rf low noise amplifier: A wideband low noise RF amplifier (LNA) (100) comprising an inductorless internal amplifier load (102). The load can include a first resistor (104) coupled to an external load or a load isolation stage (150) and a first current source (112) connected in parallel to the first resistor to provide at... Agent: Cuenot & Forsythe, L.L.C.

20070103237 - Amplifier: An amplifier comprises a carrier amplifier which performs signal amplification at all times, a peak amplifier which operates only at a time when the high electric power is outputted, a combiner which combines the output from the carrier amplifier and the peak amplifier, and a distributor which distributes an input... Agent: Mcginn Intellectual Property Law Group, PLLC

20070103236 - Apparatus, methods and articles of manufacture for processing an electromagnetic wave: A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the electromagnetic wave to generate a processed electromagnetic wave from at least one of the independently controllable current sources.... Agent: Tyco Technology Resources

20070103238 - Method and apparatus for protecting devices in an rf power amplifier: A method and apparatus are provided for use with a power amplifier for protecting active devices on the power amplifier. A peak detector is used by control circuitry to detect the presence of a peak voltage that exceeds a threshold voltage. In response to the detection of a peak voltage,... Agent: Johnson & Associates

20070096800 - Analog signal processing circuit for ccd camera, and analog signal processing method: A switched capacitor amplification circuit configuring an analog signal processing circuit newly includes switch circuits in a second switch circuit section, and a bias circuit in a bias circuit section. Switch circuits in a first switch circuit section are controlled by a pulse wave, are fixedly switched off during a... Agent: Ratnerprestia

20070096801 - Amplifier circuit: An amplifier circuit includes a first clock generator and a pulse width modulator. The first clock generator outputs a first clock of which frequency is dependent on the voltage level of a power supply voltage. The pulse width modulator generates a signal having a duration proportional to data based on... Agent: GlobalIPCounselors, LLP

20070096802 - Low-distortion tri-state switching amplifier: A switching amplifier includes a level shifting circuit for adjusting a voltage level of an original input signal to generate a first input signal and a second input signal. The first input signal is identical to the original input signal except for referring to a first reference level. The second... Agent: North America Intellectual Property Corporation

20070096803 - Low-distortion tri-state switching amplifier: A switching amplifier includes a level shifting circuit for adjusting a voltage level of an original input signal to generate a first input signal and a second input signal. The first input signal is identical to the original input signal except for referring to a first reference level. The second... Agent: North America Intellectual Property Corporation

20070096805 - Multiple power mode amplifier with bias modulation option and without bypass switches: A multiple power mode amplifier provides a low and a high power mode without using switches. This amplifier may be used in radio frequency (RF) applications such as mobile telephones, pagers, portable digital assistants, and wireless e-mail devices. In the low power mode, the power consumption of the amplifier is... Agent: Townsend And Townsend And Crew, LLP

20070096804 - Transmitting output stage with adjustable output power and process for amplifying a signal in a transmitting output stage: In one embodiment of a transmitting output stage, a first controllable amplification device with a first amplification factor and a second amplification device with a second amplification factor are provided. The two amplification devices are connected on the input side to a signal input. The transmitting output stage comprises a... Agent: Eschweiler & Associates, LLC National City Bank Building

20070096806 - 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.

20070096807 - Transconductance amplifiers with compensation: An amplifier circuit comprises a first operational transconductance amplifier (OTA) has an input that communicates with the output of the first amplifier. A third amplifier has an input that communicates with the input of the first amplifier and an output. A fourth OTA has an input that communicates with the... Agent: Harness, Dickey & Pierce P.L.C

20070096808 - Nested transimpendance amplifier: A differential transimpedance amplifier circuit comprises first, second, third and fourth operational amplifiers having a first inverting input, a first non-inverting input, a first inverting output and a first non-inverting output. A first feedback element communicates with the second non-inverting input and the second inverting output. A second feedback element... Agent: Harness, Dickey & Pierce P.L.C

20070096809 - Radio frequency power amplifier: A bias voltage is applied via a first resistance to the base of a first transistor, and a radio frequency signal is input via a first capacitor to the base of the first transistor. The bias voltage is applied via a second resistance to the base of a second transistor.... Agent: Mcdermott Will & Emery LLP

20070096810 - Dual mode power amplifier: A power amplifier is configured to operate in a first gain mode and a second gain mode. A first power amplifier input stage has an input and an output. A second power amplifier input stage has an input and an output, where the output of the second power amplifier input... Agent: Farjami & Farjami LLP

20070096811 - Predistortion control device and method, assembly including a predistortion control device: A predistortion control device (1). The device has a first predistortion control input connectable to a power amplifier output (21); a second predistortion control input (11) connectable to a signal contact of a predistortion device; and a predistortion control output (12) connectable to a control contact of the predistortion device.... Agent: Ericsson Inc.

20070096812 - Switching amplifier with output filter feedback: An improved PWM amplifier is disclosed that uses multiple integrators in the loop filter to provide high loop gain across the frequency band-of-interest. The frequency characteristics of the loop filter is optimized to distribute large loop gains across the entire selected frequency band to provide large suppression of noise and... Agent: Patent-trademark-copyright. Us

20070096813 - Differential circuit with improved linearity: A differential circuit includes main transistors differentially coupled for converting differential input signals into main differential currents at output terminals. The differential circuit also includes compensation transistors coupled to the main transistors for converting the differential input signals into compensation differential currents at the output terminals. Each compensation differential current... Agent: Law Office Of Monica H Choi

20070096815 - Analog preamplifier calibration: A combined analog and digital calibration circuit and method for adjusting an output offset voltage of a differential amplifier circuit are provided. The circuit comprises a digitally controlled voltage divider positioned between at least one isolated well and a controllable voltage source, a controllable voltage source controlled by an initial... Agent: Hewlett Packard Company

20070096814 - Differential amplifiers: Differential amplifiers comprise a differential input stage, first, second, third, and fourth fixed current sources, a first resistive element, and a current-folding element. Due to topology thereof, the differential amplifier converts the difference between the input voltages to the voltage difference between the source voltages of the transistors in the... Agent: Thomas, Kayden, Horstemeyer & Risley, LLP

20070096817 - High-bandwidth high-gain amplifier: An amplifier circuit includes a first transistor having a control terminal that receives a first amplifier input, a first terminal, and a second terminal. A second transistor includes a control terminal that receives a second amplifier input, a first terminal, and a second terminal that communicates with the second terminal... Agent: Harness, Dickey & Pierce P.L.C

20070096816 - Rf power amplifier and method for packaging the same: A method and apparatus is provided for use in power amplifiers for reducing the peak voltage that transistors are subjected to. A power amplifier is provided with first and second switching devices and an inductor connected between the switching devices. The switching devices are driven such that the switching devices... Agent: Johnson & Associates

20070096818 - Variable-gain amplifier and related method: A variable gain amplifier, VGA, and related method are provided. A reference current variably controlled by a control signal is provided, then the reference current is divided to a load current and an input-control current according to differential driving between a constant reference signal and the control signal. Then the... Agent: North America Intellectual Property Corporation

20070096819 - Cmos amplifier: A CMOS amplifier according to the present invention includes an input stage, an output stage, a feedforward type idling current control circuit, and an interrupter circuit. The output stage includes a grounded-source push-pull circuit having an output P-channel MOS transistor and an output N-channel MOS transistor. The input stage includes... Agent: Stevens, Davis, Miller & Mosher, LLP

20070096820 - Differential amplifier and active load for the same: The differential amplifier and an active load are provided. The differential amplifier includes a differential input section which is configured to generate a differential current according to a differential input signal; and an active load which is configured to generate a differential output signal according to the differential current. The... Agent: Sughrue Mion, PLLC

20070096821 - Wide-band amplifier: An amplifier that achieves impedance matching in a wide frequency band is provided. The wide-band amplifier includes a first n-type metal oxide semiconductor (NMOS) transistor which receives an input signal; a second NMOS transistor which buffers a signal amplified by the first NMOS transistor; a third NMOS transistor which amplifies... Agent: Sughrue Mion, PLLC

20070096822 - Amplifier control system: An amplifier control system for regulating the gain of a controlled amplifier. The control system comprises a first signal source for generating a first reference signal. A replica amplifier representative of the controlled amplifier generates an output signal in dependence on the first reference signal. A second signal source generates... Agent: International Business Machines Corporation

20070096823 - Bias circuit for bjt amplifier: The embodiments of the present invention include a bias circuit for a power-amplifying device, which receives and amplifies an input RF signal having a series of RF cycles within a modulation envelop. The bias circuit compensates odd-order distortion processes by detecting the power in the input signal and providing a... Agent: Dorsey & Whitney LLP

20070096824 - System and method for controlling transmitter output levels in a wireless communications device: A system and method are disclosed for controlling transmitter output levels in a wireless communications device. The system comprises: a transmitter configured to accept an adjusted transmit bias control value and to supply a transmitter output level in response to the adjusted transmit bias control value; and a gain control... Agent: Kyocera Wireless Corp.

20070096825 - Operational amplifier, integrating circuit, feedback amplifier, and controlling method of the feedback amplifier: An operational amplifier according to an embodiment of the present invention includes: an operational amplifier stage executing differential-amplification of an input voltage and a reference voltage; a source-grounded amplifier stage outputting the differential-amplified signal; a phase compensation capacitance compensating for a phase of an output signal; and a charge/discharge control... Agent: Foley And Lardner LLP Suite 500

20070096826 - Methods and system of feedback in amplifier circuit: A method and system for providing feedback in an amplifier circuit. At least some of the illustrative embodiments are a method comprising providing feedback to a base of a transistor of an emitter-follower circuit, the providing proportional to both amplitude of a collector current and frequency of a collector current.... Agent: Hewlett Packard Company

20070096827 - Multi controlled output levels cmos power amplifier (pa): A power amplifier, comprises a plurality of amplifying transistors; a plurality of cascode transistors coupled to the amplifying transistors; and an antenna coupled to the amplifying transistors via a capacitor. The cascode transistors act as switches controlling the coupling of the amplifying transistors to the antenna.... Agent: Squire, Sanders & Dempsey L.l.p

20070096828 - Cross-differential amplifier: A cross-differential amplifier is provided. The cross-differential amplifier includes an inductor connected to a direct current power source at a first terminal. A first and second switch, such as transistors, are connected to the inductor at a second terminal. A first and second amplifier are connected at their supply terminals... Agent: Mr. Christopher John Rourk Jackson Walker LLP

20070096829 - Output offset protection for power amplifier: A output offset protection circuit provides protection of the load and the power amplifier through monitoring the temperature of the power transistor in the operational amplifier to detect fault conditions of an output block. In the output offset protection circuit, a sensor block monitors the temperature differences between the power... Agent: Gregory A. Stobbs

20070096830 - 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

20070096832 - High-bandwidth high-gain amplifier: An amplifier circuit includes a first transistor having a control terminal that receives a first amplifier input, a first terminal, and a second. The amplifier circuit includes a transimpedance amplifier having an input that communicates with the first terminal of the first transistor, and an output. The amplifier circuit includes... Agent: Harness, Dickey & Pierce P.L.C

20070096831 - Multi-stage broadband amplifiers: Provided herein are multi-stage broadband amplifier configured to achieve a high gain-bandwidth product in a non-distributed architecture and methods for designing the same. The broadband amplifier can include an input stage having a broadband matching unit and an input buffer unit, a gain stage having an RLC network and a... Agent: Orrick, Herrington & Sutcliffe, LLPIPProsecution Department