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Amplifiers

20130113552 - Offset compensation for sense amplifiers: A method of re-offsetting a plurality of amplifier is provided. The method includes testing the plurality of amplifiers based on a re-offset value at bulks of compensation transistors of the plurality of amplifiers; identifying a first group of first amplifiers of the plurality of amplifiers favoring reading a first logic... Agent: Taiwan Semiconductor Manufacturing Company, Ltd.

20130113553 - Chopper: A chopper comprises a differential difference amplifier, a first switch, and a second switch. The differential difference amplifier comprises a first input stage and a second input stage. The first input stage comprises a non-inverting input terminal and an inverting input terminal. The second input stage comprises a non-inverting input... Agent: Himax Technologies Limited

20130113554 - Signal splitting apparatus suitable for use in a power amplifier: Disclosed is a signal splitting apparatus useable in a power amplifier having two or more power amplifiers. The apparatus includes a direct gain component; and a derived gain component connected to the direct gain component. The derived gain component derives the derived gain from the direct gain by imposing a... Agent: Telefonaktiebolaget L M Ericsson (publ)

20130113557 - Amplifying device: An efficient amplifying device is achieved. An amplifying device that amplifies a signal subject to amplification is configured as follows. That is, an amplifier (PA 5) that amplifies a signal is provided. Level control means 1 converts a level of the signal subject to amplification according to the level of... Agent:

20130113555 - Power amplifier with improved power efficiency: Provided is a power amplifier used in a transmitter of a communication system. The power amplifier may include a power amplifier module to amplify power of a transmitting signal, an energy converter module to receive thermal energy generated by the power amplifier module and to convert the received thermal energy... Agent: Electronics And Telecommunications Research Institute

20130113556 - Voltage, current, and saturation prevention: In one embodiment, saturation of the control system of a power amplifier is limited by comparing a control voltage at a first control node against a scaled battery voltage, and then drawing an error current away from the first control node when the control voltage exceeds the scaled battery voltage.... Agent: Rf Micro Devices, Inc.

20130113558 - Amplifier thermal management: A thermally regulated amplifier system includes an amplifier unit, a temperature-sensing unit and a controller. The amplifier unit includes a power amplifier that has an adjustable gain function. The controller receives temperature readings from the temperature-sensing unit, computes the gain G(n) of the amplifier unit, and provides the computed gain... Agent: Harman Becker Automotive Systems Gmbh

20130113559 - Device and method for pre-distorting and amplifying a signal based on an error attribute: A method and a device may be provided. The device may include a non-linear amplifying circuit arranged to apply a non-linear gain function on an analog signal to provide an amplified signal; an input circuit, arranged to clip I channel and Q channel digital input signals supplied from a digital... Agent: Vyycore Ltd.

20130113560 - Power amplifying circuit and high-frequency module: A high-frequency module including a power amplifying circuit includes a high-frequency power amplifying element, a matching circuit, and a driving power-supply circuit. The high-frequency power amplifying element includes a high-frequency amplifying circuit and a directional coupler. A first end of a main line of the directional coupler is connected to... Agent: Murata Manufacturing Co., Ltd.

20130113561 - Output mode switching amplifier: An output mode switching amplifier, including: a transistor for signal amplification connected between a first node on an input side and a second node on an output side; a bypass path for bypassing the transistor between the first node and the second node; a voltage control circuit for switching whether... Agent: Mitsubishi Electric Corporation

20130113562 - Current reuse electronic device based on magnetic coupling components: A current reuse device including a first stage provided with a first input for a first input signal and a first output for a first output signal; a second stage comprising a second input for a second input signal and a direct current terminal operating as a ground terminal for... Agent: Stmicroelectronics S.r.l.

20130113564 - Fast settling low power low noise amplifier: Aspects of the present invention provide apparatuses and methods to provide slew rate enhancement during an initial stage of operation of an amplifier and processing of an input signal with low noise introduction during a subsequent amplification stage of operation. During the initial stage, a high bandwidth component of the... Agent: Analog Devices, Inc.

20130113563 - Gain enhancement for cascode structure: Aspects of the present invention provide apparatuses and methods to provide significant gain enhancement for a cascode structure for a differential amplifier. The cascode structure of the differential amplifier can include first and second pairs of output transistors. The second pair of output transistors can be configured to approximately cancel... Agent: Analog Devices, Inc.

20130113565 - Linear differential amplifier with high input impedance: A differential amplifier provides an amplifier circuit including two differential pairs. A first differential pair is connected in series to a second differential pair. The second differential pair is connected in a crosswise manner at least indirectly to a differential output signal of the first differential pair. The first differential... Agent: Rohde & Schwarz Gmbh & Co. Kg

20130113566 - Variable gain amplifier: An apparatus and method are provided. Generally, an input signal is applied across a main path (through an input network) and across a cancellation path (through a cancellation circuit). The cancellation circuit subtracts a cancellation current from the main path as part of the control mechanism, where the magnitude of... Agent: Texas Instruments Incorporated

20130113567 - Semiconductor integrated circuit, and reception apparatus and radio communication terminal including semiconductor integrated circuit: A semiconductor integrated circuit includes: a first capacitance element and a second capacitance element; a first amplification circuit that amplifies a potential difference of a first voltage signal and a second voltage signal supplied via the first capacitance element and the second capacitance element, respectively, to output a first amplification... Agent: Renesas Mobile Corporation

20130113568 - Push-pull low-noise amplifier with area-efficient implementation: An amplifier integrated circuit (IC) includes a push-pull configuration including a push stage and a pull stage. A first loop of wire is configured to form a first degeneration inductance of the push stage. A second loop of wire is configured to form a first degeneration inductance of the pull... Agent: Marvell World Trade Ltd.

20130113569 - Cross-coupled multipath feedforward operational amplifiers: An operational amplifier can include a plurality of amplifiers connected to form a plurality of amplification paths extending from an input terminal to an output terminal of the operational amplifier. An amplifier in one of the amplification paths can include an intrinsic amplification-transistor capacitance connected between a first amplifier input... Agent: Analog Devices, Inc.

20130113570 - Method and device for controlling power amplification: A method and network equipment for controlling power amplification are disclosed. The method for controlling power amplification includes outputting a voltage signal according to the state of an NE. The voltage signal is applied to a grid electrode or a base electrode of at least one power amplifier transistor in... Agent: Huawei Technologies Co., Ltd.

20130113571 - Antenna lna filter for gnss devices: A low-noise amplifier (LNA) filter for use with global navigation satellite system (GNSS) devices is disclosed. A first LNA stage, which is configured to connect to an antenna configured to receive GNSS signals, includes an LNA. A second LNA stage, which is connected to the output of the first LNA... Agent: Javad Gnss, Inc.

20130106505 - Dual-mode capacitive transimpedance amplifier, and read-out device incorporating the same: A capacitive transimpedance amplifier for a detector unit capable of generating first and second detection currents comprises: a read-out circuit including an integration capacitor coupled between an input node connected to the detector unit, and a common node between first and second transistors connected in series, and a sampling and... Agent:

20130106506 - Adjustable gain audio power amplifying circuit: An adjustable gain audio power amplifying circuit includes an input unit, an audio amplifying unit connected to the input unit, a gain adjusting unit connected to the audio amplifying unit, a controlling unit connected to the gain adjusting unit, a comparing unit connected between the gain adjusting unit and the... Agent: Ipgoal Microelectronics(sichuan) Co., Ltd.

20130106507 - Systems and methods for performing multi-modal power amplification: In accordance with an embodiment of the disclosure, systems and methods are provided for multi-modal power amplification. In certain implementations, an adjustable power amplifier amplifies an input signal, and the amount of amplification is varied based on the input signal. A variable impedance unit receives an amplified input signal, and... Agent: Marvell World Trade Ltd.

20130106508 - Inductance based parallel amplifier phase compensation: A direct current (DC)-DC converter, which includes a parallel amplifier and a switching supply, is disclosed. The switching supply includes switching circuitry, a first inductive element, and a second inductive element. The parallel amplifier has a feedback input and a parallel amplifier output. The switching circuitry has a switching circuitry... Agent: Rf Micro Devices, Inc.

20130106509 - Power amplifier linearization using cancellation-based feed forward methods and systems: Linearizers can improve the linearity of power amplifiers by canceling or reducing amplitude of non-linearity components, (e.g., IM3, IM5, IM7, IM9, etc.) generated by the power amplifier. The linearizers can obtain samples of signals output by the power amplifier and process the samples to produce a canceling signal that is... Agent: Intersil Americas Inc.

20130106510 - Audio-output amplifier circuit for audio device, audio device, electronic device including audio device, and output control method for audio device: An audio-output amplifier circuit for an audio device includes an output amplifier and a switching element connected between an amplifier-output terminal of the output amplifier and ground, to short-circuit the amplifier-output terminal of the output amplifier after transition to ground-level voltage is finished.... Agent:

20130106511 - Switching amplifier using inductor current feedback: A switching amplifying method or a switching amplifier for obtaining a linearly amplified replica of an input signal, is highly efficient, and does not have the disadvantage of “dead time” problem related to the class D amplifiers. Said switching amplifier comprises: an inductor means; a switching unit for switching a... Agent:

20130106512 - Folded cascode operational amplifier: A folded cascode operational amplifier is disclosed. The folded cascode operational amplifier includes a first current source, a second current source, and a first voltage terminal connected to the first current source and the second current source. The folded cascode operational amplifier also includes a first input-transistor connected to the... Agent:

20130106513 - Differential amplifier: Aspects of the disclosure provide a differential amplifier. The differential amplifier includes a first pair of complementary transistors, a second pair of complementary transistors, and a current source. First control terminals of the first pair of complementary transistors are coupled to a first input node of the differential amplifier and... Agent: Marvell World Trade Ltd.

20130106514 - High voltage driver amplifier for piezo haptics: A high-voltage driver amplifier for piezo haptics comprises an input amplifier having a gain greater than one, a first amplifier of an amplifier pair coupled to an output of the input amplifier, a second amplifier of the amplifier pair coupled to the output of the input amplifier, a first impedance... Agent: Texas Instruments Incorporated

20130106515 - Method and apparatus of common mode compensation for voltage controlled delay circuits: An apparatus of common mode compensation for voltage controlled delay circuits and method are provided. In one implementation a method includes amplifying a differential input signal to generate a differential output signal using a differential pair of transistors biased by a tail current; changing the tail current by a first... Agent: Realtek Semiconductor Corp.

20130106516 - Fast settling reference voltage buffer and method thereof: A fast settling reference voltage buffer and method are disclosed. In one of embodiments, An apparatus comprising: an OTA (operational trans-conductance amplifier) with a positive input terminal coupled to a reference voltage, a negative input terminal coupled to a feedback node, and an output terminal coupled to a circuit node... Agent: Realtek Semiconductor Corp.

20130106517 - Power amplifier tube and power amplification method: The present invention discloses a power amplifier tube and a power amplification method, wherein, the power amplifier tube includes a High Electron Mobility Transistor (HEMT) power amplifier die and a Lateral Double-Diffused Metal-Oxide Semiconductor (LDMOS) power amplifier die, and the HEMT power amplifier die and the LDMOS power amplifier die... Agent:

20130106518 - Integrated circuit: According to one embodiment, provided are an amplifier transistor configured to amplify an input signal; a biasing circuit configured to set a bias voltage in such a manner as to allow the amplifier transistor to perform amplification; an electrostatic protective circuit configured to set the bias voltage for the amplifier... Agent: Kabushiki Kaisha Toshiba

20130106520 - Hybrid class amplifier: A power amplifier is configured to generate impedances at harmonic frequencies such that the power amplifier operates in a class C mode in a low output amplitude range and in a class F or inverse F mode in a high output amplitude range. Related methods of operation are also discussed.... Agent: Telefonaktiebolaget L M Ericsson (publ)

20130106519 - Radio frequency amplifier circuit: A radio frequency amplifier circuit includes: low-output transistors, each of which includes an input terminal, an output terminal, and a ground terminal, and amplifies a radio frequency signal; a harmonic processing circuit provided for each of the low-output transistors to be connected to the output terminal of the low-output transistor,... Agent:

20130106521 - Operational amplifying device: An operational amplifying device comprises an input stage and an output stage. The input stage receives and processes an input voltage to output an amplified voltage. The output stage is electrically connected to the input stage in series. The output stage comprises a first switch and a second switch. The... Agent: Himax Technologies Limited

20130099857 - Audio programmable gain amplifier with automatic reconfiguration: A reconfigurable amplifier comprising a first operational amplifier having two inputs and an output. A second operational amplifier having two inputs and an output. A plurality of switches coupled to the two inputs and the output of the first operational amplifier and the two inputs and the output of the... Agent:

20130099858 - Dual primary switched transformer for impedance and power scaling: This application reduces the power of series combined transformers and of parallel combined transformers while maintaining efficiency. In one embodiment, a series combined transformer is provided with a switch between a first primary inductor and a second primary inductor, in order to provide at least two modes. In a high... Agent: Rf Micro Devices, Inc.

20130099859 - Multilevel class-d amplifier: A multilevel class-D differential amplifier which can be operated in at least three modes includes a first power stage and a second power stage. In an idle mode, an output of the first power stage varies between a first voltage level and a second voltage level, wherein an output of... Agent: Maxim Integrated Products, Inc.

20130099860 - High frequency power amplifier: A Doherty amplifier includes an impedance transformer located between a load and a signal combining point of a carrier amplifier and a peak amplifier. The impedance transformer subjects, at frequencies including a fundamental frequency and at least a second harmonic frequency thereof, an impedance Zo of the load to impedance... Agent: Nec Corporation

20130099861 - Method and apparatus for controlling transmit signal of radio frequency power amplifier: A method and an apparatus for controlling a transmit signal of a radio frequency power amplifier are provided. The method includes: adjusting a power supply voltage of the power amplifier to an efficiency point power supply voltage under designated transmit power; querying correspondence between an input voltage and transmit power... Agent: Huawei Device Co., Ltd.

20130099862 - Linearization of broadband power amplifiers: An RF linearizer and an associated method are provided for linearizing a power amplifier. The RF linearizer may include: (a) a quadrature up-converter for up-converting a baseband input signal that is to be transmitted by the power amplifier; (b) an RF analog predistorter controlled by a set of coefficients for... Agent: Scintera Networks, Inc.

20130099863 - Fourth-order electrical current source apparatus, systems and methods: Apparatus and methods disclosed herein operate to receive a differential input signal at a first-stage pair of transconductance devices. The differential signal is amplified by a second-order factor at a positive-side or a negative-side first-stage transconductance device, depending upon the polarity of the differential input signal, to create a second-order... Agent:

20130099864 - Power amplifier: A power amplifier according to the present invention includes: an input-side transformer which has an annular primary coil which is a first metal line and a plurality of linear secondary coils which are second metal lines, and matches input impedance and divides the input signal into a plurality of split... Agent: Panasonic Corporation

20130099865 - Low-stress cascode structure: An amplifier system comprises a cascode common-source (CS) amplifier including a plurality of transistors connected in a common-source configuration. A stress reducing circuit is connected to at least one of the plurality of transistors to equalize a voltage drop across the plurality of transistors. The stress reducing circuit includes a... Agent: Marvell World Trade Ltd.

20130099867 - Apparatus for doherty power amplifier and method for power amplification: The present invention discloses a Doherty power amplifier apparatus and a power amplification method. The apparatus includes an auxiliary power amplifier apparatus and a main power amplifier apparatus, the auxiliary power amplifier apparatus is used to amplify signal power by adopting a Laterally Diffused Metal Oxide Semiconductor (LDMOS) device; and... Agent: Zte Corporation

20130099866 - System and method for a multi-band power-amplifier: In accordance with an embodiment, a method of amplifying a plurality of frequency bands includes amplifying a first frequency band and a second frequency band with a main amplifier, amplifying the first frequency band with a first peaking amplifier, amplifying the second frequency band with a second peaking amplifier, and... Agent: Futurewei Technologies, Inc.

20130099868 - Sound detecting circuit and amplifier circuit thereof: Disclosed is a sound detecting circuit which includes a sensing unit configured to generate an AC signal in response to a sound pressure level of a sound signal; an amplification unit configured to amplify the AC signal; and a bias voltage generating unit configured to generate a bias voltage to... Agent: Electronics & Telecommunications Research Institute

20130093509 - Hybrid coupler: A circuit for amplifying an input signal can comprise a plurality of couplers. A splitting coupler of the plurality of couplers can receive the input signal and a combining coupler of the plurality of couplers can provides an output signal. N number of amplifiers can be included in the circuit... Agent:

20130093510 - High-frequency signal amplifier: A high-frequency signal amplifier includes an amplifier having an input terminal and an output terminal, and amplifying a high-frequency signal; a signal line connected between the output terminal of the amplifier and an antenna; coupled lines arranged in parallel and coupled to the signal line and having different line lengths... Agent: Mitsubishi Electric Corporation

20130093511 - Apparatus and method for improving efficiency in power amplifier: An apparatus and method for enhancing the whole efficiency of power amplification in a supply modulated amplifier are provided. The power amplification apparatus includes a controller, a Doherty power amplifier, and a supply modulated amplifier. The controller selects a power amplifier among the Doherty power amplifier and the supply modulated... Agent: Samsung Electronics Co. Ltd.

20130093513 - Apparatus and method for expanding operation region of power amplifier: An apparatus and a method for expanding an operation region in an envelope tracking power amplifier are provided. The apparatus for amplifying power of a transmission signal includes an amplitude component determination unit, a supply modulator, and a power amplify module. The amplitude component determination unit determines an amplitude component... Agent: Samsung Electronics Co., Ltd.

20130093512 - Power amplifier and operation controlling circuit thereof: There are provided a power amplifier and an operation controlling circuit thereof. The power amplifier includes: a signal generating unit generating a current input signal; an amplifying unit amplifying the current input signal; and a driving circuit unit supplying a driving signal to the amplifying unit, wherein the signal generating... Agent: Samsung Electro-mechanics Co., Ltd.

20130093514 - Power converter system for mobile devices: A power converter system for managing power between a power supply and a load, the system including: a first buck-boost circuit connected to the power supply; and a capacitor provided between the buck-boost circuit and the load to buffer power supply for the load. The system may include a second... Agent: Research In Motion Limited

20130093515 - Pwm comparator and class d amplifier: The present disclosure generally relates to a PWM comparator and a class D. The PWM comparator described above introduces current feedback mechanism, basing the waveform state of received high frequency triangle signal and the level state of output signal of the PWM comparator, the hysteresis is changing dynamically. In the... Agent:

20130093517 - Buffer amplifier: A buffer amplifier with unity voltage gain, high input impedance, high speed, high current gain, high output power and low offset includes three stages and a DC servo circuit. The first stage of the buffer amplifier contains complementary N-channel and P-channel MOSFET source followers that provide high input impedance to... Agent:

20130093516 - Low output impedance rf amplifier: A radio frequency (RF) power amplifier includes a low impedance pre-driver driving the input of a common-source output amplifier stage. The preamplifier includes a first transistor that has a first terminal coupled to a preamplifier RF input node, a second terminal coupled to a preamplifier RF output node, and a... Agent:

20130093518 - Balanced-input current-sensing differential amplifier: A balanced-input current-sensing differential amplifier of the invention has a first signal input terminal, a second signal input terminal, a first signal output terminal and a second signal output terminal. The balanced-input current-sensing differential amplifier comprises a first current mirror, the input terminal of the first current mirror being coupled... Agent: Tekcem

20130093519 - Positive and negative voltage input operational amplifier set: A positive and negative voltage input operational amplifier includes a positive operational amplifier and a negative operational amplifier. Each of the positive operational amplifier and the negative operational amplifier has a reduced layout area and a lowered static current, so that the power consumption is effectively reduced.... Agent: Orise Technology Co., Ltd.

20130093520 - Power amplifier with low noise figure and voltage variable gain: The object of the present invention is a low noise figure amplifier with a variable gain which comprises a cascode amplification stage comprising, serially mounted, a low-voltage MOSFET transistor installed as a common source followed by a bipolar transistor with high breakdown voltage installed as a common base. A resistor... Agent: Alcatel Lucent

20130093521 - Apparatus and method for interleaving switching in power amplifier: An apparatus of a hybrid power modulator using interleaving switching is provided. The apparatus includes a linear switching unit for generating an output signal by comparing an envelope input signal and a feedback signal, an interleaving signal generator for generating an interleaving switching signal arranged not to supply the signal... Agent: Samsung Electronics Co., Ltd.