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Amplifiers

Below are recently published patent applications awaiting approval from the USPTO. Recent week's RSS XML file available below.
Listing for abstract view: USPTO application #, Title, Abstract excerpt,Patent Agent. Listing format for list view: USPTO National Class full category number, title of the patent application.
  
12/04/2014 > 12 patent applications in 9 patent subcategories.

20140354353 - Device having a delta-sigma modulator and a switching amplifier connected thereto: A delta-sigma modulator for a switching amplifier, which achieves a high signal-to-noise ratio (SNR) in the multi-MHz range and keeps the noise-transfer function over the useful frequency range as low and as flat as possible. A series connection of a parallel-serial converter and a downstream swap element for the serial... Agent:

20140354352 - Self-oscillating class-d amplifier and self-oscillating frequency control method for self-oscillating class-d amplifier: A self-oscillation frequency varying element for varying the self-oscillation frequency of a self-oscillation loop of a self-oscillating class-D amplifier is placed in the self-oscillation loop. Frequency comparison, cycle comparison, or phase comparison is performed between a self-oscillation signal of the self-oscillating class-D amplifier or a signal corresponding to the self-oscillation... Agent: Yamaha Corporation

20140354354 - Nanovolt amplifier design: A circuit can include operational amplifier having a first input, a second input, and an output, first and second resistors in series between the output of the op-amp and a ground, and multiple switches configurable to toggle the circuit between a positive phase and a negative phase.... Agent: Keithley Instruments, Inc.

20140354355 - Method of calibrating a multiport amplifier, multiport amplifier allowing the implementation of such a method, and satellite comprising such an amplifier: A method of calibrating a multiport amplifier comprising a plurality of input ports, a plurality of power amplifiers linked to input ports by a matrix distributing signals, a plurality of output ports linked to the power amplifiers by a matrix recombining signals and a plurality of elements for weighting the... Agent: Thales

20140354356 - Circuits and methods related to power amplifier efficiency based on multi-harmonic approximation: Circuits and methods related to power amplifier efficiency based on multi-harmonic approximation. In some embodiments, an output network circuit can be provided for multi-harmonic control of a radio-frequency (RF) power amplifier. The output network circuit can include an impedance matching network configured for a fundamental frequency of the power amplifier.... Agent:

20140354357 - Apparatus for common mode suppression: An apparatus is provided that includes first and second ICs configured to communicate using a plurality of differential signal lines. The apparatus includes a common mode suppression circuit having a plurality of common mode voltage adjustment circuits, each configured to provide a low impedance path for common mode signals and... Agent:

20140354359 - High-frequency signal processing device: Disclosed is a high-frequency signal processing device capable of reducing transmission power variation and harmonic distortion. For example, the high-frequency signal processing device includes a pre-driver circuit, which operates within a saturation region, and a final stage driver circuit, which operates within a linear region and performs a linear amplification... Agent:

20140354358 - Power amplifier: The present disclosure relates to a power amplifier, the power amplifier including a first amplifier configured to form a common source by allowing sources of a plurality of first transistors to be commonly connected, a second amplifier configured to form a common source by allowing sources of a plurality of... Agent: Postech Academy-industry Foundation

20140354360 - High frequency module and portable terminal using same: When the frequency bandwidth of a high frequency signal to be amplified is changed, the linearity of a high frequency module deteriorates. A high frequency module has an amplifier circuit including an amplification transistor and a variable impedance circuit, and an output matching network. Based on an amplifying operation, the... Agent:

20140354361 - Sense amplifiers including bias circuits: Sense amplifiers including bias circuits axe described. Examples include bias circuits having an adjustable width transistor. A loop gain of the bias circuit may be determined in part by the adjustable width of the transistor. Examples of sense amplifiers including amplifier stages configured to bias an input/output node to a... Agent:

20140354362 - Amplifier calibration: A system and method of calibrating an amplifier are presented. The amplifier has a first amplification path and a second amplification path. A first state of the amplifier is identified defining a first phase shift of the first path and a second phase shift of the second path resulting in... Agent: Freescale Semiconductor, Inc.

20140354363 - Power amplifier: The present disclosure relates to a power amplifier, the power amplifier comprising a first amplifier including at least two first transistors whose sources are commonly connected to form a common source, a second amplifier including at least two second transistors whose gates are commonly connected to form a common gate,... Agent: Postech Academy-industry Foundation

  
11/27/2014 > 14 patent applications in 11 patent subcategories.

20140347123 - Amplifier: An amplifier (1) is provided, in particular, wideband amplifier with an input (4) and an output (5) comprising a first amplifier stage (2) and a second amplifier stage (3), wherein the first amplifier stage (2) has an active power splitter with at least one injection point, wherein this injection point... Agent: Fraunhofer-gesellschaft Zur Forderung Der Angewandten Forschung E.v.

20140347124 - Power amplifier control circuits: Circuits for reducing power consumption in power amplifier circuits are disclosed. In certain embodiments, a circuit for power control in the transmitter includes a coupling circuit, a first power amplifier circuit and a second power amplifier circuit. The coupling circuit includes a primary winding inductively associated with a first secondary... Agent: Texas Instruments Incorporated

20140347125 - Efficient power amplification over large operating average power range: Embodiments of a Doherty power amplifier that maintain efficiency over a large operating average power range are disclosed. In one embodiment, the Doherty power amplifier includes reconfigurable main and auxiliary output matching networks and a fixed combining network. The reconfigurable main and auxiliary output matching networks can be reconfigured such... Agent: Telefonaktiebolaget L M Ericsson (publ)

20140347126 - Low complexity digital predistortion for concurrent multi-band transmitters: Systems and methods are disclosed for digital predistortion for a concurrent multi-band transmitter using a single adaptor and a same set of predistortion coefficients for separate digital predistorters for each band. In one embodiment, the single adaptor is configured to adaptively configure a set of predistortion coefficients based on a... Agent: Telefonaktiebolaget L M Ericsson (publ)

20140347128 - Digital class-d amplifier and digital signal processing method: A digital class D amplifier (10) is disclosed, comprising a pulse width modulator (PW Mod) comprising: a digital loop filter (Loop F) adapted to receive an input signal (x[n]) and a feedback signal (fb[n]), the digital loop filter (Loop_F) being adapted to process at a clock frequency (f_s) said input... Agent: St-ericsson Sa

20140347127 - Switching power amplifier and method for controlling the switching power amplifier: A switching power amplifier includes: a first transistor controlled by a first digital signal to selectively output a first output signal; a second transistor controlled by a second digital signal to selectively output a second output signal; and a control circuit arranged to generate the second digital signal according to... Agent: Mediatek Inc.

20140347129 - Semiconductor circuit: A semiconductor circuit which can have stable input output characteristics is provided. Specifically, a semiconductor circuit in which problems caused by the leakage current of a switching element are suppressed is provided. A field-effect transistor in which a wide band gap semiconductor, such as an oxide semiconductor, is used in... Agent:

20140347130 - Semiconductor integrated circuit device and high-frequency power amplifier module: The invention provides a semiconductor integrated circuit device and a high-frequency power amplifier module capable of reducing variations in the transmission power characteristics. The semiconductor integrated circuit device and the high-frequency power amplifier module each include, for example, a bandgap reference circuit, a regulator circuit, and a reference-voltage correction circuit... Agent: Murata Manufacturing Co., Ltd.

20140347131 - Semiconductor device and circuit with dynamic control of electric field: A circuit, comprising a semiconductor device with one or more field gate terminals for controlling the electric field in a drift region of the semiconductor device; and a feedback circuit configured to dynamically control a bias voltage or voltages applied to the field gate terminal or terminals, with different control... Agent: Nxp B.v.

20140347132 - Power amplifier apparatus, transmitter apparatus, and method of controlling the power amplifier apparatus: A power amplifier apparatus includes an amplifier configured to amplify an input signal converted into an analog signal, a distortion compensator circuitry configured to perform a pre-distortion process to an input signal at a second sampling rate higher than a first sampling rate at which the input signal is converted... Agent: Fujitsu Limited

20140347134 - Bandwidth-extended doherty power amplifier: The present invention provides a new structure of Doherty power amplifier. The present invention reduces use of ¼ wavelength lines and lowers the Q point of the Doherty power amplifier. The present method extends the DPA bandwidth with a simpler and more convenient design and facilitates the design of a... Agent: Alcatel Lucent

20140347133 - Doherty amplifier: A Doherty amplifier has different drain voltages applied to the power transistors of the main and peaking stages. The impedance inverter comprises at least one first series phase shifting element between the output of the main amplifier and the Doherty amplifier output and at least one second series phase shifting... Agent: Nxp B.v.

20140347136 - Apparatus and methods for radio frequency amplifiers: Apparatus and methods for radio frequency (RF) amplifiers are disclosed herein. In certain implementations, a packaged RF amplifier includes a first bipolar transistor including a base electrically connected to an RF input pin and a collector electrically connected to an RF output pin, and a second bipolar transistor including a... Agent:

20140347135 - Bipolar transistors with control of electric field: The invention provides a bipolar transistor circuit and a method of controlling a bipolar transistor, in which the bipolar transistor has a gate terminal for controlling the electric field in a collector region of the transistor. The bias voltage applied to the gate terminal is controlled to achieve different transistor... Agent: Nxp B.v.

  
11/20/2014 > 16 patent applications in 13 patent subcategories.

20140340145 - Signal processing circuit, resolver digital converter, and multipath nested mirror amplifier: A signal processing circuit includes a chopper amplifier that has a differential amplifier circuit that amplifies differential input signals Vsp(t) and Vsm(t), and an adder circuit that generates an addition signal Vfil(t) by addition of the chopper output signal Vsub(t) that the chopper amplifier generates. Differential signals inputted into the... Agent: Renesas Electronics Corporation

20140340147 - Amplifier circuit and amplification method: A true ground amplifier circuit in which a voltage sensor senses the output voltage and generates a binary output which indicates whether the output is above or below a threshold. A variable gain feedback system generates a feedback signal for combination with the digital input, thereby to provide offset cancellation.... Agent: Nxp B.v.

20140340148 - Variable gain amplifier: A method may include applying an input differential voltage to input terminals of an amplifier, a first input terminal coupled to a gate of a first transistor and a second input terminal coupled to a gate of a second transistor. The method may also include varying a gain of the... Agent:

20140340146 - Variable-gain dual-output transconductance amplifier-based instrumentation amplifiers: A variable-gain current conveyor-based instrumentation amplifier without introducing distortion. An exemplary variable-gain instrumentation amplifier includes a first dual-output transconductance amplifier (DOTA) (i.e., current conveyor) that receives a first input voltage, a second DOTA that receives a second input voltage, a first resistive element connected between the first and second DOTA,... Agent:

20140340149 - Method for low power low noise input bias current compensation: Low power low noise input bias current compensation for an amplifier input stage is provided by recycling the tail current of the differential pair transistors. A local amplifier regulates the tail current and buffers the base current of the tail current transistor, which is mirrored back to the input transistors... Agent: Analog Devices, Inc.

20140340151 - Transconductance amplifier: A transconductance amplifier comprises a set of amplifier stages. The last stage of the amplifier is split with a certain ratio whereby one part is used to deliver output current and other part to deliver feedback current to the input.... Agent: Nxp B.v.

20140340150 - Transconductance circuit and a current digital to analog converter using such transconductance circuits: An example transconductance circuit is provided in accordance with one embodiment. The transconductance circuit can comprise: an output node; at least one transistor; a variable resistance; and a differential amplifier; wherein the at least one transistor and the variable resistance are in series connection with the output node, an output... Agent: Analog Devices Technology

20140340152 - Adaptive power amplifier and methods of making same: An exemplary embodiment of the present invention provides an adaptive power amplifier comprising a transistor, a resistive load, and a tuning circuit. The transistor has a drain, a source, and a gate. The resistive load can be electrically coupled to the drain. The tuning circuit can be electrically coupled to... Agent: Georgia Tech Research Corporation

20140340153 - Automatic gain control of a received signal using a power target: The present invention relates to a method and device for performing automatic gain control of a received signal. The method comprises the steps of receiving (S101) the signal and amplifying the received signal on the basis of a difference between a power reference value and actual power of the amplified... Agent: Telefonaktiebolaget L M Ericsson (publ)

20140340154 - Systems and methods for image lag mitigation for buffered direct injection readout with current mirror: Embodiments relate to systems and methods for image lag mitigation for a buffered direct injection readout circuit with current mirror. A photo detector device is coupled to a buffered direct injection (BDI) circuit, in which an operational amplifier and other elements communicate the output signal from the detector to subsequent... Agent:

20140340155 - Linearization of heterogeneous power amplifier systems: Systems and methods are provided for adaptive linearization of an amplifier system having a plurality of heterogeneous amplifier paths. An amplifier system includes a plurality of amplifier paths, each configured to provide an amplified output signal from an input signal, and a signal combiner configured to combine the amplified output... Agent: Hbc Solutions, Inc.

20140340156 - Amplifier: An amplifier comprises a power amplifier for amplifying an unmodulated high-frequency input signal, a first branching device which is provided at an input terminal side of the power amplifier and extracts a signal, a second branching device which is provided at an output terminal side of the power amplifier and... Agent: Kabushiki Kaisha Toshiba

20140340157 - Power amplifier: A power amplifier comprising a plurality of primary amplifying channels arranged to each receive an input signal from one or more signal sources for generating a primary amplified output in each of the plurality of primary amplifying channels, a secondary amplifying channel in communication with the one or more signal... Agent:

20140340158 - Reducing kickback current to power supply during charge pump mode transitions: Kickback current from a charge pump to a power management integrated circuit (PMIC) may be reduced by dissipating charge from fly and hold capacitors during mode transitions. A switch may be placed in series between the charge pump and the PMIC to disconnect the charge pump and prevent kickback current... Agent: Cirrus Logic, Inc.

20140340159 - Circuit layout and method for frequency-dependent matching of a high-frequency amplifier stage: A circuit for frequency-dependent matching of a high-frequency amplifier stage includes high-frequency stage with an output to a total high-frequency path that divides a total frequency band into a plurality of partial frequency paths for respectively preset partial frequency bands. The outputs of the plurality of partial frequency paths are... Agent: Eads Deutschland Gmbh

20140340160 - Semiconductor power amplifier: A semiconductor power amplifier comprises an input-side amplifier for inputting and amplifying an input signal, a balanced amplifier which is connected to an output terminal of the input-side amplifier, comprises two hybrid couplers and a plurality of power amplifiers, passes the input signal, and converts a reflective wave into thermal... Agent: Kabushiki Kaisha Toshiba

  
11/13/2014 > 12 patent applications in 10 patent subcategories.

20140333374 - Travelling wave amplifier providing cascade units each including dynamic cascade transistor whose collector output fed-back to base input: A traveling wave amplifier including differential circuits to suppress the backward wave effect is disclosed. The differential amplifier includes two cascade units providing a switching transistor, a static cascade transistor, and a dynamic cascade transistor connected in series. The dynamic cascade transistor provides a feedback circuit to feed the collector... Agent: Sumitomo Electric Industries, Ltd.

20140333375 - Method and circuit for driving a switch-mode amplifier array: A circuit arrangement for generating the drive signals for at least three radio frequency switch-mode amplifiers is described. The circuit arrangement comprises at least two switch-mode amplifiers performing RF out-phasing, and at low RF power level, the average switching frequency—averaged over time and over all switch-mode amplifiers—is less than the... Agent:

20140333377 - Capture buffer of digital predistortion systems: An improved DPD system includes a predistortion module having at least one predistortion function. The predistortion module is configured to receive and subsequently process a baseband signal. The system also includes a power amplifier configured to receive the processed baseband signal from the predistortion module. The system further includes a... Agent: Zte Corporation

20140333376 - Scalable digital predistortion system: The scalable digital predistortion system provides a behavioral model that can be used to model and compensate for the nonlinear distortions of power amplifiers and transmitters. The predistorter and update algorithms make the model/DPD scalable in terms of signal bandwidth and average power, allowing for low complexity update following changes... Agent: King Fahd University Of Petroleum And Minerals

20140333379 - Broadband power amplifier having high efficiency: A wideband power amplifier module includes a plurality of switch mode amplifiers and a plurality of impedance amplifier modules. Each switch mode amplifier includes an input to receive an input signal, and an RF output to output an RF power signal. The switch mode amplifier includes at least one semiconductor... Agent: Raytheon Company

20140333378 - Circuit arrangement for generating a radio frequency signal: A circuit arrangement for generating a radio frequency signal is described. The circuit arrangement comprises an RF output port, a shunt capacitor connected to the RF output port, at least two switch-mode amplifiers, each switch-mode amplifier comprising a switch-mode amplifier output port and a series inductive circuit element connected between... Agent:

20140333380 - Class ab differential line drivers: An output stage of a differential line driver generates a differential output signal. A common-mode component of the differential output signal is decoupled from the differential output signal using a common-mode voltage sense. The common-mode component of the differential output signal is provided to a capacitor that is coupled between... Agent:

20140333381 - Apparatus and methods for buffer linearization: Apparatus and methods for buffer linearization are provided. In certain implementations, an amplifier includes a buffer circuit and a gain circuit. The buffer circuit includes a buffer transistor pair used to buffer a differential input signal to generate a differential buffered signal. Additionally, the gain circuit includes a gain transistor... Agent:

20140333382 - Method and system for providing automatic gate bias and bias sequencing for field effect transistors: A feedback gate bias circuit for use in radio frequency amplifiers to more effectively control operation of LDFET, GaNFET, GaAsFET, and JFET type transistors used in such circuits. A transistor gate bias circuit that senses drain current and automatically adjusts or biases the gate voltage to maintain drain current independently... Agent:

20140333383 - Quadrature lattice matching network: Embodiments include but are not limited to apparatuses and systems including a quadrature lattice matching network including first path having a series inductor and a shunt inductor, and a second path having a series capacitor and a shunt capacitor. Other embodiments may be described and claimed.... Agent:

20140333384 - Circuits and methods related to low-noise amplifiers having improved linearity: Disclosed are circuits and methods related to low-noise amplifiers (LNAs) having improved linearity. In some embodiments, a radio-frequency (RF) amplifier circuit can include a first amplifying transistor configured to amplify an RF signal. The RF amplifier circuit can further include a switchable inductance circuit that couples the first amplifying transistor... Agent:

20140333385 - Dual-band semiconductor rf amplifier device: There is described a dual-band semiconductor RF amplifier device. The device comprises (a) a transistor (205) having an output capacitance (CO), (b) a first shunt element (210) arranged in parallel with the output capacitance, the first shunt element comprising a first shunt inductor (L1) connected in series with a first... Agent: Nxp B.v.

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