公开(公告)号：US20190131462A1

公开(公告)日：2019-05-02

申请号：US16176448

申请日：2018-10-31

申请人： IMEC VZW

发明人： Carolina MORA LOPEZ

IPC分类号： H01L29/8605 ,  H01L27/07 ,  H01L29/06 ,  H03F3/45 ,  H01L29/861 ,  G01N27/04 ,  A61B5/04

CPC分类号： H01L29/8605 ,  A61B5/04002 ,  G01N27/045 ,  H01L27/0788 ,  H01L29/0688 ,  H01L29/861 ,  H03F3/45071 ,  H03F3/45475 ,  H03F2200/129 ,  H03F2200/261 ,  H03F2200/264 ,  H03F2200/297 ,  H03F2200/42 ,  H03F2203/45116 ,  H03F2203/45151 ,  H03F2203/45152 ,  H03F2203/45156 ,  H03F2203/45174 ,  H03F2203/45224 ,  H03F2203/45512 ,  H03F2203/45518 ,  H03F2203/45524 ,  H03F2203/45526 ,  H03F2203/45544 ,  H03F2203/45546 ,  H03F2203/45548 ,  H03F2203/45594 ,  H03F2203/45602 ,  H03F2203/45604 ,  H03F2203/45631 ,  H03F2203/45632 ,  H03F2203/45698 ,  H03F2203/45712

摘要： A pseudo-resistor structure, comprises: a first and a second PMOS transistor or PN diode configured as two-terminal devices, wherein the positive terminal of the first PMOS transistor or PN diode is connected to the positive terminal of the second PMOS transistor or PN diode, and wherein the negative terminal of the first PMOS transistor or PN diode is connected to an input (A) of the pseudo-resistor structure and wherein the negative terminal of the second PMOS transistor or PN diode is connected to an output (C) of the pseudo-resistor structure, and a dummy transistor or dummy diode connected to the input (A), wherein the dummy transistor or dummy diode is further connected to a bias voltage for compensating a leakage current through the first and the second PMOS transistors or PN diodes. A closed-loop operational amplifier circuit comprising the pseudo-resistor structure is provided. Also, a bio-potential sensor comprising the closed-loop operational amplifier circuit is provided.

公开(公告)号：US20180198418A1

公开(公告)日：2018-07-12

申请号：US15641596

申请日：2017-07-05

申请人： Taiwan Semiconductor Manufacturing Company Limted

发明人： An-Hsun Lo ,  En-Hsiang Yeh ,  Tzu-Jin Yeh ,  Wen-Sheng Chen

IPC分类号： H03F1/30 ,  H03F3/45 ,  H03F3/193

CPC分类号： H03F1/301 ,  H03F3/193 ,  H03F3/45183 ,  H03F3/45246 ,  H03F3/45475 ,  H03F3/45632 ,  H03F3/45928 ,  H03F2200/135 ,  H03F2200/294 ,  H03F2200/447 ,  H03F2200/451 ,  H03F2200/462 ,  H03F2200/471 ,  H03F2203/45116 ,  H03F2203/45512

摘要： An amplifying unit includes a converter and a feedback mechanism. The converter has a supply input coupled to a supply node. The converter further has an input terminal configured to receive an input signal. The converter is configured to amplify the input signal from the input terminal to generate an output signal. The feedback mechanism is coupled to the input terminal of the converter and is configured to cause a constant bias current to flow from the supply node through the converter based on the input signal.

公开(公告)号：US09973146B2

公开(公告)日：2018-05-15

申请号：US15657618

申请日：2017-07-24

申请人： SHENZHEN GOODIX TECHNOLOGY CO., LTD.

发明人： Mengwen Zhang

IPC分类号： H03F3/04 ,  H03F1/02 ,  H03F1/30 ,  H03F1/32 ,  H03F3/187

CPC分类号： H03F1/0205 ,  H03F1/301 ,  H03F1/32 ,  H03F3/005 ,  H03F3/187 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45192 ,  H03F3/45475 ,  H03F3/45659 ,  H03F3/45699 ,  H03F3/45762 ,  H03F2200/129 ,  H03F2200/156 ,  H03F2200/159 ,  H03F2200/18 ,  H03F2200/222 ,  H03F2200/252 ,  H03F2200/264 ,  H03F2200/471 ,  H03F2200/555 ,  H03F2203/45008 ,  H03F2203/45012 ,  H03F2203/45024 ,  H03F2203/45028 ,  H03F2203/45054 ,  H03F2203/45068 ,  H03F2203/45082 ,  H03F2203/45112 ,  H03F2203/45134 ,  H03F2203/45136 ,  H03F2203/45171 ,  H03F2203/45174 ,  H03F2203/45182 ,  H03F2203/45188 ,  H03F2203/45192 ,  H03F2203/45208 ,  H03F2203/45244 ,  H03F2203/45332 ,  H03F2203/45421 ,  H03F2203/45434 ,  H03F2203/45444 ,  H03F2203/45512 ,  H03F2203/45514 ,  H03F2203/45534 ,  H03F2203/45544 ,  H03F2203/45546 ,  H03F2203/45551 ,  H03F2203/45586 ,  H03F2203/45588 ,  H03F2203/45616 ,  H03F2203/45632 ,  H03F2203/45642 ,  H03F2203/45656 ,  H03F2203/45674 ,  H03F2203/45676

摘要： An amplifying circuit includes a reference voltage generating circuit, a common-mode voltage conversion circuit, a common-mode negative feedback circuit, and an amplifying sub-circuit. The reference voltage generating circuit generates a first reference voltage, a second reference voltage, and a reference common-mode voltage according to a post-stage common-mode voltage. The common-mode voltage conversion circuit converts the pre-stage output differential signal into a differential input signal according to the reference common-mode voltage. The common-mode negative feedback circuit generates a control voltage to quickly establish a common-mode negative feedback of the amplifying sub-circuit, wherein the first reference voltage and the second reference voltage are used to cancel a baseline signal of the pre-stage output differential signal. The amplifying circuit can eliminate the baseline signal, convert the common-mode voltage and quickly establish the common-mode negative feedback.

公开(公告)号：US09954497B2

公开(公告)日：2018-04-24

申请号：US15117662

申请日：2015-02-09

申请人： The Trustees of Columbia University in the City of New York

发明人： Jianxun Zhu ,  Peter R. Kinget ,  Harish Krishnaswamy

IPC分类号： H03F1/34 ,  H03F1/22 ,  H03F3/21 ,  H03F3/45 ,  H03F3/72 ,  H03F3/193

CPC分类号： H03F1/342 ,  H03F1/223 ,  H03F3/193 ,  H03F3/211 ,  H03F3/45179 ,  H03F3/45645 ,  H03F3/72 ,  H03F2200/06 ,  H03F2200/09 ,  H03F2200/168 ,  H03F2200/294 ,  H03F2200/411 ,  H03F2200/78 ,  H03F2203/45311 ,  H03F2203/45418 ,  H03F2203/45424 ,  H03F2203/45512

摘要： Circuits for low noise amplifiers with interferer reflecting loops are provided. In some embodiments, circuits for a low noise amplifier with an interferer reflecting loop are provided, the circuits comprising: a low noise amplifier (LNA) having an input and an output; a buffer having an input coupled to the output of the LNA and an output; and notch filter having an input coupled to the output of the buffer and an output coupled to the input of the LNA.

公开(公告)号：US20180062583A1

公开(公告)日：2018-03-01

申请号：US15418405

申请日：2017-01-27

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Xin Zhao ,  Tejasvi Das ,  Hossein Mirzaie ,  Lei Zhu ,  Xiaofan Fei

IPC分类号： H03F1/26 ,  H03F3/217 ,  H03F3/45 ,  H03F3/183

CPC分类号： H03F1/26 ,  H03F3/187 ,  H03F3/2173 ,  H03F3/45475 ,  H03F3/45928 ,  H03F2200/03 ,  H03F2203/45138 ,  H03F2203/45438 ,  H03F2203/45512

摘要： A dynamic common reference input (CMRI) signal may be provided to an operational amplifier, or “op-amp,” in an amplifier system to reduce the common mode ripple of the fully-differential op-amp, while adding little or no noise in the amplifier system. The dynamic CMRI signal may be controlled such that a common-mode component of two amplifier input nodes of the operational amplifier is made approximately independent of two input signals received at two system input nodes of the amplifier system. An amplifier system with the dynamic CMRI may be used in class-D amplifiers, such as amplifiers for audio systems that generate output for headphones or speakers.

公开(公告)号：US09887689B2

公开(公告)日：2018-02-06

申请号：US15353753

申请日：2016-11-17

申请人： Murata Manufacturing Co., Ltd.

发明人： Yasuhide Takase

IPC分类号： H03H11/46 ,  H01L21/822 ,  H01L27/04 ,  H03F3/45

CPC分类号： H03H11/53 ,  H01L21/822 ,  H01L27/04 ,  H03F3/45475 ,  H03F2203/45511 ,  H03F2203/45512

摘要： A pseudo resistance circuit includes a first gate voltage adjustment circuit that adjusts respective currents of first and second current sources and also adjusts a gate voltage of a second field effect transistor to equalize or substantially equalize a drain voltage of the second field effect transistor and a voltage of a first end portion of a reference resistance element and controls a drain voltage of a first field effect transistor and the drain voltage of the second field effect transistor to maintain a constant or substantially constant relationship with each other; and a second gate voltage adjustment circuit that adjusts a gate voltage of the first field effect transistor to control the gate voltage of the second field effect transistor and the gate voltage of the first field effect transistor to maintain a constant or substantially constant relationship with each other.

公开(公告)号：US09867574B2

公开(公告)日：2018-01-16

申请号：US15049235

申请日：2016-02-22

申请人： National University of Singapore

发明人： Kian Ann Ng ,  Yong Ping Xu ,  Shih-Cheng Yen ,  Nitish V. Thakor

IPC分类号： H03F3/45 ,  A61B5/00 ,  H03F1/26 ,  A61B5/0476 ,  A61B5/04

CPC分类号： A61B5/7203 ,  A61B5/04001 ,  A61B5/04004 ,  H03F1/0233 ,  H03F1/223 ,  H03F3/211 ,  H03F3/45475 ,  H03F3/45937 ,  H03F3/68 ,  H03F2200/261 ,  H03F2200/294 ,  H03F2203/45138 ,  H03F2203/45512 ,  H03F2203/45526 ,  H03F2203/45528 ,  H03F2203/45544 ,  H03F2203/45548 ,  H03F2203/45598 ,  H03F2203/45604

摘要： A high CMRR neural signal amplifier is configured for supply rail common mode feedback (SR-CMFB) whereby a set of CMFB signals is provided to supply rails of front end LNAs. High CMRR is maintained through buffering outputs of front end signal LNAs and a reference LNA coupled to signal and reference inputs of second stage amplifiers, respectively; and buffering the reference LNA output using an active/guard buffer pair, whereby across a plurality of distinct multiplexing time intervals, during each multiplexing time interval one buffer of the pair functions as an active buffer that drives second stage amplifier reference inputs corresponding to second stage amplifier outputs being multiplexed to a set of multiplexor outputs, and the other buffer of the pair functions as a guard buffer coupled to other second stage amplifier reference inputs corresponding to second stage amplifier outputs not being multiplexed to the set of multiplexor outputs.

公开(公告)号：US20170346456A1

公开(公告)日：2017-11-30

申请号：US15536504

申请日：2015-12-14

申请人： Nordic Semiconductor ASA

发明人： Phil Corbishley

IPC分类号： H03F3/45

CPC分类号： H03F3/45183 ,  H03F3/45188 ,  H03F3/45475 ,  H03F3/45632 ,  H03F2200/18 ,  H03F2200/234 ,  H03F2200/297 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/555 ,  H03F2200/75 ,  H03F2203/21112 ,  H03F2203/21157 ,  H03F2203/45036 ,  H03F2203/45051 ,  H03F2203/45084 ,  H03F2203/45088 ,  H03F2203/45101 ,  H03F2203/45134 ,  H03F2203/45174 ,  H03F2203/45201 ,  H03F2203/45202 ,  H03F2203/45208 ,  H03F2203/45264 ,  H03F2203/45406 ,  H03F2203/45424 ,  H03F2203/45434 ,  H03F2203/45512 ,  H03F2203/45528 ,  H03F2203/45562 ,  H03F2203/45631 ,  H03F2203/45644 ,  H03F2203/45652 ,  H03F2203/45682 ,  H03F2203/45694 ,  H03F2203/45702

摘要： An operational amplifier comprises: a first amplifier stage 4 comprising a first differential pair of transistors 8, 10 arranged to receive and amplify a differential input signal 18, 20 thereby providing a first differential output signal 22, 24; and a second amplifier stage 6 comprising a second differential pair of transistors 26, 28 arranged to receive and amplify the first differential output signal 22, 24 thereby providing a second differential output signal 38, 40.

公开(公告)号：US09762257B2

公开(公告)日：2017-09-12

申请号：US15236163

申请日：2016-08-12

申请人： Cirrus Logic International Semiconductor Ltd.

发明人： Ramin Zanbaghi ,  Aaron Brennan ,  Daniel J. Allen ,  John L. Melanson

IPC分类号： H03M1/12 ,  H03M1/14 ,  H03M3/00 ,  G06F17/11 ,  H04R3/00 ,  H03F3/45 ,  H04R19/04 ,  H03F3/00 ,  G11C27/02

CPC分类号： H03M1/14 ,  G06F17/11 ,  G11C27/024 ,  H03F3/005 ,  H03F3/45475 ,  H03F3/45959 ,  H03F2203/45421 ,  H03F2203/45512 ,  H03F2203/45544 ,  H03F2203/45551 ,  H03M1/124 ,  H03M1/1295 ,  H03M3/458 ,  H03M3/496 ,  H04R3/00 ,  H04R19/04 ,  H04R29/004 ,  H04R2420/05 ,  H04R2499/11

摘要： An analog-to-digital converter (ADC) may include capability to sense and/or compensate for undesired effects when receiving input from a microphone. For example, a sense node may be provided between differential inputs, and that sense node separated from the differential inputs by two or more switches. The sense node may allow for a measurement of an average voltage of the differential inputs. The average voltage may be obtained activating the switches to sample the sampling capacitors coupled to the differential inputs. That average voltage may be used as common mode (CM) data. A controller may receive the CM data, along with differential mode (DM) data, and use the CM and DM data to determine undesired effects, such as DC or AC mismatch at the microphone interface. The controller may then generate a signal for applying compensation to the differential inputs to reduce or eliminate the undesired effects.

公开(公告)号：US20170229921A1

公开(公告)日：2017-08-10

申请号：US15502062

申请日：2015-07-31

申请人： MAPS, INC.

发明人： Jong-Tae HWANG ,  Hyun-Ick SHIN ,  Dong-Su LEE ,  Jong-Hoon LEE ,  Sang-O JEON ,  Ik-Gyoo SONG ,  Dae-Ho KIM ,  Joon RHEE

IPC分类号： H02J50/12 ,  H03F3/217

CPC分类号： H02J50/12 ,  H03F3/2173 ,  H03F3/3015 ,  H03F3/45475 ,  H03F2200/243 ,  H03F2200/391 ,  H03F2200/541 ,  H03F2203/45512 ,  H03F2203/45528 ,  H03F2203/45594 ,  H03F2203/45604

摘要： A magnetic resonance wireless power transmission device capable of adjusting resonance frequency is disclosed. A wireless power transmission device according to an embodiment of the present invention comprises: a power amplifier for amplifying a wireless power signal using a driving frequency signal; a resonator for configuring a resonance tank and wirelessly transmitting, through magnetic resonance, the wireless power signal output from the power amplifier using a resonance frequency of the resonance tank; and a resonance control unit for controlling a duty ratio using a frequency applied to the resonator or a frequency signal generated by the resonator and adjusting the resonance frequency of the resonator.