公开(公告)号：US09806685B1

公开(公告)日：2017-10-31

申请号：US15153915

申请日：2016-05-13

Applicant: MKS Instruments, Inc.

Inventor： Douglas C. Hansen

IPC: H03F3/68 ,  H03F3/45 ,  H03F1/34

CPC classification number: H03F3/45 ,  G01R19/0061 ,  H03F1/083 ,  H03F1/3211 ,  H03F1/34 ,  H03F3/45475 ,  H03F2200/153 ,  H03F2200/261 ,  H03F2200/462 ,  H03F2203/45138 ,  H03F2203/45161 ,  H03F2203/45288 ,  H03F2203/45528

Abstract: A wide dynamic range trans-impedance amplifier includes a first trans-impedance amplifier configured to receive a first input current and produce a first voltage as a function of the first input current, and a second trans-impedance amplifier configured to receive a second input current and produce a second voltage as a function of the second input current. A current steering element causes a first portion of current from a current source to flow to the first trans-impedance amplifier until the first current portion reaches the first threshold current, and causes a second portion of current from the current source to flow to the second trans-impedance amplifier, until the second current portion reaches the second threshold current. The second current portion is current from the current source that exceeds the first threshold current. The wide dynamic range trans-impedance amplifier may receive, for example, ion collector current from a hot cathode ionization gauge (HCIG).

公开(公告)号：US09793861B1

公开(公告)日：2017-10-17

申请号：US15221928

申请日：2016-07-28

Applicant: QUALCOMM Incorporated

Inventor： Thomas Somerville

IPC: H03F3/45 ,  H03F1/02 ,  H03F1/34

CPC classification number: H03F1/0222 ,  H03F1/0227 ,  H03F1/086 ,  H03F1/342 ,  H03F3/195 ,  H03F3/213 ,  H03F3/245 ,  H03F3/45179 ,  H03F3/45475 ,  H03F3/45982 ,  H03F2200/102 ,  H03F2200/372 ,  H03F2200/375 ,  H03F2200/393 ,  H03F2200/451 ,  H03F2200/462 ,  H03F2200/498 ,  H03F2200/75 ,  H03F2200/78 ,  H03F2203/45038 ,  H03F2203/45116 ,  H03F2203/45136 ,  H03F2203/45138 ,  H03F2203/45146 ,  H03F2203/45151 ,  H03F2203/45152 ,  H03F2203/45156 ,  H03F2203/45212 ,  H03F2203/45288 ,  H03F2203/45336 ,  H03F2203/45354 ,  H03F2203/45356 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45586 ,  H03F2203/45588 ,  H03F2203/45596 ,  H03F2203/45601

Abstract: Certain aspects of the present disclosure provide methods and apparatus for implementing an amplification system. The amplification system includes an amplifier comprising differential inputs and an output. The differential inputs include an inverting input and a non-inverting input. The amplification system further includes a feedback path from the output coupled to the inverting input. The feedback path from the output is coupled to at least one of an inverting amplifier or buffer, and the at least one of the inverting amplifier or buffer is further coupled to the non-inverting input.

公开(公告)号：US20170272036A1

公开(公告)日：2017-09-21

申请号：US15383261

申请日：2016-12-19

Applicant: Winbond Electronics Corp.

Inventor： Chung-Yu WU ,  Ya-Syuan SUNG

IPC: H03F1/02 ,  H03G3/30 ,  A61B5/0428 ,  H03F3/68 ,  H03F3/45 ,  A61B5/04 ,  H03H11/04 ,  H03F3/187

CPC classification number: H03F1/0205 ,  A61B5/04004 ,  A61B5/0428 ,  H03F1/08 ,  H03F3/187 ,  H03F3/45071 ,  H03F3/45197 ,  H03F3/45973 ,  H03F3/68 ,  H03F3/72 ,  H03F2200/261 ,  H03F2200/267 ,  H03F2200/408 ,  H03F2200/462 ,  H03F2203/45156 ,  H03F2203/45288 ,  H03F2203/45528 ,  H03F2203/45701 ,  H03F2203/7215 ,  H03F2203/7221 ,  H03G1/0029 ,  H03G1/0088 ,  H03G3/001 ,  H03G3/3005 ,  H03G3/3084 ,  H03G5/28 ,  H03H11/0422

Abstract: A front-end amplifier circuit for receiving a biological signal includes a signal channel. The signal channel amplifies the biological signal to generate a detection current and includes a capacitive-coupled transconductance amplifier. The capacitive-coupled transconductance amplifier amplifies the biological signal with a transconductance gain to generate a first current.

公开(公告)号：US09735735B2

公开(公告)日：2017-08-15

申请号：US15146892

申请日：2016-05-05

Applicant: MONTAGE TECHNOLOGY (SHANGHAI) CO., LTD.

Inventor： Zhenbiao Li

IPC: G06G7/42 ,  H03D7/14 ,  H03F3/45 ,  H03D7/16

CPC classification number: H03D7/1441 ,  H03D7/1458 ,  H03D7/165 ,  H03F3/45475 ,  H03F2203/45138 ,  H03F2203/45288 ,  H03F2203/45526 ,  H03F2203/45616

Abstract: The application discloses a tuner and a method for tuning a signal. The tuner comprises: a sampling module, the sampling module being configured to receive an input signal and a set of control signals, sample the input signal under the control of the set of control signals and generate a sample signal; wherein each of the set of control signals has a control period equal to (N*TVCO), and the control periods of the set of control signals synchronize with each other; a set of weighting modules, wherein each of the set of weighting modules is configured to receive the set of sample signals and weight the received sample signals with a group of weighting factors to generate a group of weighted signals; and one or more summing modules, each summing module being configured to receive one group of weighted signals generated by one of the set of weighting modules and sum the group of weighted signals to output an output signal, wherein the output signal is the input signal being shifted by a predefined frequency fVCO*mk/N.

公开(公告)号：US20170230005A1

公开(公告)日：2017-08-10

申请号：US15581445

申请日：2017-04-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yangyang Tang ,  Chen-Xiong Zhang

IPC: H03F1/02 ,  H03F3/45

CPC classification number: H03F1/0205 ,  H03F1/38 ,  H03F3/45183 ,  H03F3/45219 ,  H03F3/45273 ,  H03F2200/135 ,  H03F2200/153 ,  H03F2200/513 ,  H03F2200/87 ,  H03F2203/45028 ,  H03F2203/45036 ,  H03F2203/45051 ,  H03F2203/45054 ,  H03F2203/45114 ,  H03F2203/45124 ,  H03F2203/45134 ,  H03F2203/45221 ,  H03F2203/45281 ,  H03F2203/45288 ,  H03F2203/45342

Abstract: A differential input amplification-stage circuit comprises a voltage unit, first and second bulk-driven transistors, first and second mirror current sources, and a differential amplifier unit. The first and the second bulk-driven transistors respectively receive first and second input voltages, and converts the first and the second input voltages into first and second output currents. The differential amplifier unit separately outputs first and second adjustment currents under an action of voltages output by the first to the third voltage output ends. The first and the second mirror current sources respectively output first and second predetermined currents according to the first output current and the first adjustment current, and the second output current and the second adjustment current, so as to maintain transconductance constancy of the differential input amplification-stage circuit. Therefore, output stability is improved.

公开(公告)号：US20170207761A1

公开(公告)日：2017-07-20

申请号：US15402502

申请日：2017-01-10

Applicant: Melexis Technologies SA

Inventor： Johan RAMAN ,  Pieter ROMBOUTS

IPC: H03F3/45 ,  G01D5/14 ,  G01C17/28 ,  H03F3/387 ,  G01R33/07

CPC classification number: H03F3/45475 ,  G01C17/28 ,  G01D5/142 ,  G01R33/07 ,  H03F3/005 ,  H03F3/387 ,  H03F3/393 ,  H03F3/45098 ,  H03F3/45197 ,  H03F2200/129 ,  H03F2200/135 ,  H03F2200/156 ,  H03F2200/171 ,  H03F2200/261 ,  H03F2200/264 ,  H03F2200/27 ,  H03F2200/271 ,  H03F2200/294 ,  H03F2200/312 ,  H03F2200/321 ,  H03F2200/372 ,  H03F2200/375 ,  H03F2200/81 ,  H03F2203/45288 ,  H03F2203/45472 ,  H03F2203/45496 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45528 ,  H03F2203/45536 ,  H03F2203/45552 ,  H03F2203/45564 ,  H03F2203/45594 ,  H03F2203/45596

Abstract: A semiconductor circuit comprising an input block having a first chopper providing a chopped voltage signal, a first transconductance converting said chopped voltage signal into a chopped current signal, a second chopper providing a demodulated current signal, a current integrator having an integrating capacitor providing a continuous-time signal, a first feedback path comprising: a sample-and-hold block and a first feedback block, the first feedback path providing a proportional feedback signal upstream of the current integrator. The amplification factor is at least 2. Charge stored on the integrating capacitor at the beginning of a sample period is linearly removed during one single sampling period. Each chopper operates at a chopping frequency. The sample-and-hold-block operates at a sampling frequency equal to an integer times the chopping frequency.

公开(公告)号：US20170201327A1

公开(公告)日：2017-07-13

申请号：US14990723

申请日：2016-01-07

Applicant: Fujitsu Limited

Inventor： Jian Hong Jiang

IPC: H04B10/61 ,  H03F3/45

CPC classification number: H04B10/616 ,  H03F3/082 ,  H03F3/45475 ,  H03F3/45645 ,  H03F3/45753 ,  H03F2200/453 ,  H03F2203/45288

Abstract: A method and system for amplifying small optical currents in an optical receiver front end system may employ multiple transimpendance amplifiers (TIAs) and feedback control loops. For example, the front end system may include a main feedback control loop (having a main TIA) and a replica feedback control loop (having a replica TIA) that, collectively, generate an optimum input common mode level for a differential amplifier operating at high data rates (e.g., speeds up to tens of gigabits per second). The replica TIA may track the noise from the power supply of the optical receiver in the substantially same manner as the main TIA. Therefore, the differential signals produced by the main control loop may not be degraded at the input to the high-speed differential amplifier. The outputs of the high-speed differential amplifier may be symmetric about the common mode level and may be suitable inputs for voltage sampling.

公开(公告)号：US20170141787A1

公开(公告)日：2017-05-18

申请号：US15087625

申请日：2016-03-31

Applicant: Cypress Semiconductor Corporation

Inventor： Rishi Raghav Bacchu ,  Kaveh Hosseini ,  Dermot MacSweeney ,  Paul M. Walsh

IPC: H03M3/00 ,  G01R27/26 ,  H03F3/45

CPC classification number: H03M3/322 ,  G01R27/2605 ,  H03F3/45071 ,  H03F3/45475 ,  H03F2200/129 ,  H03F2203/45146 ,  H03F2203/45288 ,  H03F2203/45522 ,  H03M3/02 ,  H03M3/424

Abstract: A circuit, system, and method for measuring capacitance are described. A current may be received at an input of a conversion circuit. The current may be converted to a voltage signal which may be used to create a negative feedback current to the input of the conversion circuit and which may be demodulated digitally to provide a static digital output representative of a capacitance.

公开(公告)号：US09641170B2

公开(公告)日：2017-05-02

申请号：US14814050

申请日：2015-07-30

Applicant: COSEMI TECHNOLOGIES, INC.

Inventor： Wu-Chun Chou ,  Robert Monroe Smith ,  Iain Ross MacTaggart ,  John Joseph Stronczer ,  Charles Phillip McClay

IPC: H03K3/00 ,  H03K17/60 ,  H03F3/19 ,  H03F3/45 ,  H01S5/042 ,  H03F3/50 ,  H05B33/08

CPC classification number: H03K17/60 ,  H01S5/042 ,  H01S5/0427 ,  H03F3/19 ,  H03F3/4508 ,  H03F3/45475 ,  H03F3/50 ,  H03F2200/135 ,  H03F2200/219 ,  H03F2200/303 ,  H03F2200/42 ,  H03F2200/462 ,  H03F2200/481 ,  H03F2203/45101 ,  H03F2203/45116 ,  H03F2203/45288 ,  H05B33/08

Abstract: A power efficient device for driving a load comprising a low current path and a high current path, wherein the high current path is driven by a first voltage source. In order to accommodate larger turn on voltages of possible load devices while maintaining low power operation, an additional voltage source exceeding the voltage source in the high current path is introduced in the low current path.

公开(公告)号：US09641142B2

公开(公告)日：2017-05-02

申请号：US14965588

申请日：2015-12-10

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Sudheer Prasad

IPC: H03F3/393 ,  H03F3/45 ,  H03F1/08

CPC classification number: H03F3/393 ,  H03F1/086 ,  H03F3/45475 ,  H03F3/45977 ,  H03F2200/252 ,  H03F2200/267 ,  H03F2200/271 ,  H03F2200/297 ,  H03F2200/471 ,  H03F2203/45151 ,  H03F2203/45212 ,  H03F2203/45264 ,  H03F2203/45288

Abstract: One example includes a hot-swap control system. The system includes a sense resistor network provides a sense voltage in response to an output current. The system also includes a sense control circuit includes a chopper amplifier system arranged in a servo feedback arrangement to generate a monitoring voltage having an amplitude that is associated with the output current based on the sense voltage. A notch filter chopping stage filters out signal ripple in the chopper amplifier system across a unity-gain bandwidth of the chopper amplifier system, and a capacitive compensation network provides stability-compensation of the chopper amplifier system across the unity-gain bandwidth. A transconductance amplifier configured to compare the monitoring voltage with a predetermined reference voltage to generate a control voltage. The system further includes a power transistor configured to conduct the output current to an output based on the control voltage.