公开(公告)号：US20240039493A1

公开(公告)日：2024-02-01

申请号：US18360467

申请日：2023-07-27

申请人： REALTEK SEMICONDUCTOR CORPORATION

发明人： SHIH-HSIUNG HUANG

IPC分类号： H03F3/45

CPC分类号： H03F3/45179 ,  H03F3/45636 ,  H03F2203/45551 ,  H03F2203/45514

摘要： The present application discloses an amplification circuit. The amplification circuit includes an amplifier, a feedback unit, a second feedback unit, a first correlated double sampling unit, and a second correlated double sampling unit. The amplifier has a first positive input terminal, a second positive input terminal, a first negative input terminal, a second negative input terminal, a positive output terminal, and a negative output terminal. First terminals of the first feedback unit and the second feedback unit are coupled to the positive output terminal. The first correlated double sampling unit is coupled to the first negative input terminal and a second terminal of the first feedback unit, and performs a sample operation and an output operation. The second correlated double sampling unit is coupled to the second negative input terminal and a second terminal of the second feedback unit, and performs the sample operation and the output operation.

公开(公告)号：US20190006868A1

公开(公告)日：2019-01-03

申请号：US15576644

申请日：2017-07-17

申请人： BOE TECHNOLOGY GROUP CO., LTD.

发明人： Chen SONG ,  Airong LIU ,  Tangxiang WANG ,  Lei CHEN

IPC分类号： H02J7/00 ,  H03K5/24 ,  H03F3/45

CPC分类号： H02J7/0068 ,  H02J7/345 ,  H03F3/45475 ,  H03F2200/129 ,  H03F2203/45116 ,  H03F2203/45514 ,  H03K5/24

摘要： A method is disclosed for controlling charging/discharging of a capacitor module. The capacitor module includes a plurality of branches connected in parallel, each of which includes a capacitor and a switch connected in series with the capacitor. The method includes measuring a first charge/discharge time for the capacitor module being charged/discharged from an initial voltage to an intermediate voltage, and To adjusting a second charge/discharge time for the capacitor module being further charged/discharged from the intermediate voltage to a target voltage by controlling on/off of at least one of the switches depending on the first charge/discharge time, the intermediate voltage being between the initial voltage and the target voltage. Also disclosed are an apparatus for controlling charging/discharging of a capacitor module and a display apparatus including the apparatus.

公开(公告)号：US09973198B2

公开(公告)日：2018-05-15

申请号：US15495786

申请日：2017-04-24

申请人： Texas Instruments Incorporated

发明人： Roswald Francis

IPC分类号： H03F3/45 ,  H03M1/00 ,  H03F3/50

CPC分类号： H03M1/001 ,  H03F3/45 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45237 ,  H03F3/45479 ,  H03F3/45636 ,  H03F3/505 ,  H03F2203/45022 ,  H03F2203/45188 ,  H03F2203/45404 ,  H03F2203/45406 ,  H03F2203/45421 ,  H03F2203/45461 ,  H03F2203/45514 ,  H03F2203/45634 ,  H03M1/1245 ,  H03M1/164 ,  H03M1/44

摘要： Telescopic amplifier circuits are disclosed. In an embodiment, a telescopic amplifier includes an input stage for receiving differential input signals, an output stage for outputting differential output signals at the drains of a first output transistor and a second output transistor, a tail current transistor coupled to sources of a first input transistor and a second input transistor, a common mode feedback circuit coupled to the differential output signals and outputting a common mode output signal, and a circuit element coupled between the common mode output signal and a gate of the tail current transistor. In an embodiment the circuit element is a resistor. In another embodiment the circuit element is a source follower transistor. In additional embodiments a phase margin of the common mode feedback open loop gain of the amplifier is determined by the value of the resistor. Additional embodiments are disclosed.

公开(公告)号：US20180102768A1

公开(公告)日：2018-04-12

申请号：US15837299

申请日：2017-12-11

申请人： OLYMPUS CORPORATION

发明人： Yasunari Harada ,  Masato Osawa ,  Hideki Kato

IPC分类号： H03K5/08 ,  H03F3/45 ,  H04N5/378

CPC分类号： H03K5/08 ,  H03F3/45 ,  H03F3/45188 ,  H03F3/45475 ,  H03F3/45659 ,  H03F2203/45288 ,  H03F2203/45424 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03M1/1014 ,  H03M1/1061 ,  H03M1/468 ,  H04N5/374 ,  H04N5/378

摘要： A semiconductor device is provided that includes an amplification circuit, a downstream circuit, and a clipping circuit. The amplification circuit includes a sampling capacitor, a feedback capacitor, and an operational amplifier circuit. The sampling capacitor holds air input signal on which sampling is performed, as a signal whose reference is a first reference voltage. The signal that is held in the sampling capacitor is transferred to the feedback capacitor. The operational amplifier circuit amplifies the signal that is held in the sampling capacitor, according to a ratio between values of the sampling capacitor and the feedback capacitor, and outputs the amplified signal, as a signal whose reference is a second reference voltage. The clipping circuit limits a voltage of an output signal of the operational amplifier circuit to a predetermined voltage or below.

公开(公告)号：US09921254B2

公开(公告)日：2018-03-20

申请号：US14724258

申请日：2015-05-28

申请人： TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY, LTD.

发明人： Yung-Chow Peng ,  Chih-Chiang Chang ,  Wen-Shen Chou ,  Brady Yang

IPC分类号： G06F19/00 ,  G01R27/28 ,  H03F3/45

CPC分类号： G01R27/28 ,  H03F3/45475 ,  H03F2200/261 ,  H03F2203/45514

摘要： A circuit for measuring a bandwidth of an amplifier includes a switch-capacitor circuit and a controller. The switch-capacitor circuit is coupled to an output and an input of the amplifier. The switch-capacitor circuit is switchable between a sampling mode and an amplification mode. The controller is coupled to the switch-capacitor circuit and the output of the amplifier. The controller is configured to switch the switch-capacitor circuit between the sampling mode and the amplification mode, control the amplification mode to have various durations, and determine the bandwidth of the amplifier based on the various durations of the amplification mode and corresponding voltages at the output of the amplifier.

公开(公告)号：US20180076779A1

公开(公告)日：2018-03-15

申请号：US15600484

申请日：2017-05-19

申请人： Analog Devices Global

发明人： Hanqing Wang ,  Gerard Mora-Puchalt

IPC分类号： H03F3/00 ,  H03F3/42 ,  H03F3/45 ,  H03F3/393 ,  H03F1/02 ,  H03F1/56 ,  H03F1/32

CPC分类号： H03F3/005 ,  H03F1/02 ,  H03F1/14 ,  H03F1/3211 ,  H03F1/56 ,  H03F3/387 ,  H03F3/393 ,  H03F3/426 ,  H03F3/45071 ,  H03F3/45475 ,  H03F2200/213 ,  H03F2200/267 ,  H03F2200/271 ,  H03F2200/378 ,  H03F2203/45458 ,  H03F2203/45514 ,  H03M3/00 ,  H03M3/496

摘要： A capacitive gain amplifier circuit includes two sets of Miller capacitors and two output stage differential amplifier circuits. A first set of Miller capacitors is used to compensate the first output stage differential amplifier circuit during a first phase that resets the first output stage differential amplifier circuit. The second set of Miller capacitors is used to compensate the first output stage differential amplifier circuit during a second phase that chops a signal being amplified. The second set of Miller capacitors is swapped from one polarity to an opposite polarity of the first output stage differential amplifier circuit during successive second phases. The second output stage differential amplifier circuit includes a set of inputs selectively coupled with the inputs of the first output stage differential amplifier circuit and a set of outputs selectively coupled with the outputs of the first output stage differential amplifier circuit during the second phase.

公开(公告)号：US20170331432A1

公开(公告)日：2017-11-16

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： H03F1/02 ,  H03F3/187 ,  H03F1/30 ,  H03F1/32

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：US20170250661A1

公开(公告)日：2017-08-31

申请号：US15442008

申请日：2017-02-24

申请人： SII Semiconductor Corporation

发明人： Eiki IMAIZUMI

IPC分类号： H03F3/00 ,  H03K5/24

CPC分类号： H03F3/005 ,  H03F3/45475 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03F2203/45586 ,  H03K5/24 ,  H03M1/403

摘要： In order to realize a circuit in a subsequent stage with a smaller circuit scale with respect to a single-ended input of a large signal, a double-sampling switched-capacitor input circuit includes a first switched-capacitor input circuit, which includes first capacitors for double sampling, and a second switched-capacitor input circuit, which includes second capacitors for double sampling, and which is configured to operate in opposite phase to the first switched-capacitor input circuit, the double-sampling switched-capacitor input circuit having a configuration in which the first capacitors and the second capacitors have different values, and in which the value of the second capacitors is adjusted so that a signal is attenuated.

公开(公告)号：US20170230054A1

公开(公告)日：2017-08-10

申请号：US15495786

申请日：2017-04-24

申请人： Texas Instruments Incorporated

发明人： Roswald Francis

IPC分类号： H03M1/00 ,  H03F3/50 ,  H03F3/45

CPC分类号： H03M1/001 ,  H03F3/45 ,  H03F3/45183 ,  H03F3/45188 ,  H03F3/45237 ,  H03F3/45479 ,  H03F3/45636 ,  H03F3/505 ,  H03F2203/45022 ,  H03F2203/45188 ,  H03F2203/45404 ,  H03F2203/45406 ,  H03F2203/45421 ,  H03F2203/45461 ,  H03F2203/45514 ,  H03F2203/45634 ,  H03M1/1245 ,  H03M1/164 ,  H03M1/44

摘要： Telescopic amplifier circuits are disclosed. In an embodiment, a telescopic amplifier includes an input stage for receiving differential input signals, an output stage for outputting differential output signals at the drains of a first output transistor and a second output transistor, a tail current transistor coupled to sources of a first input transistor and a second input transistor, a common mode feedback circuit coupled to the differential output signals and outputting a common mode output signal, and a circuit element coupled between the common mode output signal and a gate of the tail current transistor. In an embodiment the circuit element is a resistor. In another embodiment the circuit element is a source follower transistor. In additional embodiments a phase margin of the common mode feedback open loop gain of the amplifier is determined by the value of the resistor. Additional embodiments are disclosed.

公开(公告)号：US09692376B2

公开(公告)日：2017-06-27

申请号：US14214709

申请日：2014-03-15

申请人： David Schie

发明人： David Schie

IPC分类号： H02J7/34 ,  H02J1/10 ,  H02J3/38 ,  H03F3/45 ,  H03K5/00

CPC分类号： H03F3/45475 ,  H03F2203/45514 ,  H03F2203/45551 ,  H03K5/00 ,  Y10T307/549

摘要： A switched capacitor circuit including two or more capacitors arranged in a switched capacitor circuit configuration with a comparator comparing a node whose potential varies with the charging of one or more of the switched capacitors. The switched capacitor circuit also has two or more current sources scaled relative to one another coupled to the capacitors and to the comparator, where the current from one current source charges at least two of the capacitors in series during the charge portion of the cycle, and the other current source charges at least one of but at least one fewer of the capacitor(s) during the charge portion of the cycle, and where the current sources are enabled at the beginning of the charge portion of the cycle, but where the comparator disables the current sources once the node reaches a reference potential.