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    METHODS AND APPARATUS FOR DRIVER CALIBRATION
    1.
    发明公开
    METHODS AND APPARATUS FOR DRIVER CALIBRATION 审中-公开

    公开(公告)号：US20240291438A1

    公开(公告)日：2024-08-29

    申请号：US18658837

    申请日：2024-05-08

    申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

    发明人： Seiji TAKEUCHI

    IPC分类号： H03F1/30 ,  G03B13/36 ,  G05F3/24 ,  H02P25/034 ,  H03F3/45 ,  H03M1/10

    CPC分类号： H03F1/30 ,  G03B13/36 ,  G05F3/24 ,  H02P25/034 ,  H03F3/45 ,  H03F2200/453 ,  H03M1/1009

    摘要： Driver circuits, systems for driving actuators, and imaging systems with actuators. The driver circuit includes a current comparator circuit, a driver, and a replica circuit. The current comparator circuit includes a first node having a first voltage. The current comparator circuit also includes a second node having a second voltage. The driver includes a first terminal responsive to the second voltage. The driver also includes a second terminal connected to a reference voltage. The replica circuit includes a third terminal connected to the first node. The replica circuit also includes a fourth terminal connected to the second terminal of the driver. The replica circuit also includes a fifth terminal connected to the first terminal of the driver.

    METHODS AND APPARATUS FOR DRIVER CALIBRATION
    2.
    发明公开
    METHODS AND APPARATUS FOR DRIVER CALIBRATION 审中-公开

    公开(公告)号：US20230387865A1

    公开(公告)日：2023-11-30

    申请号：US18450123

    申请日：2023-08-15

    申请人： SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC

    发明人： Seiji TAKEUCHI

    IPC分类号： H03F1/30 ,  G03B13/36 ,  G05F3/24 ,  H03F3/45 ,  H02P25/034

    CPC分类号： H03F1/30 ,  G03B13/36 ,  G05F3/24 ,  H03F3/45 ,  H02P25/034 ,  H03F2200/453 ,  H03M1/1009

    摘要： Driver circuits, systems for driving actuators, and imaging systems with actuators. The driver circuit includes a current comparator circuit, a driver, and a replica circuit. The current comparator circuit includes a first node having a first voltage. The current comparator circuit also includes a second node having a second voltage. The driver includes a first terminal responsive to the second voltage. The driver also includes a second terminal connected to a reference voltage. The replica circuit includes a third terminal connected to the first node. The replica circuit also includes a fourth terminal connected to the second terminal of the driver. The replica circuit also includes a fifth terminal connected to the first terminal of the driver.

    PVT robust closed loop CMOS bias for linear power amplifier
    7.
    发明授权
    PVT robust closed loop CMOS bias for linear power amplifier 有权

    公开(公告)号：US10020782B2

    公开(公告)日：2018-07-10

    申请号：US15286616

    申请日：2016-10-06

    申请人： DSP Group LTD.

    发明人： Avi Cohen ,  Ron Pongratz

    IPC分类号： H03F3/04 ,  H03F1/30 ,  H03F1/02 ,  H03F3/345 ,  H03F3/193 ,  H03F3/24

    CPC分类号： H03F1/301 ,  H03F1/0216 ,  H03F1/223 ,  H03F3/193 ,  H03F3/245 ,  H03F3/345 ,  H03F2200/451 ,  H03F2200/453

    摘要： A biasing device for direct current (DC) biasing a linear power amplifier that comprises multiple linear power amplifier circuits that are ideally identical to each other; wherein the biasing device may include a replica circuit that is a replica of a linear power amplifier circuit of the multiple linear power amplifier circuits; and a bias control circuit; wherein the bias control circuit is configured to feed the replica circuit with one or more DC biasing signals thereby maintaining at a constant value a replica DC current that is consumed by the replica circuit, and maintaining at a fixed value a replica DC voltage of a replica output node of the replica circuit; and wherein the replica circuit is coupled the multiple linear power amplifier circuits and is configured to supply DC voltage bias signals that force each linear power amplifier circuit of the multiple linear power amplifier circuits to consume a linear power amplifier circuit DC current that equals the replica DC current, when the linear power amplifier circuit is fed with a linear power amplifier DC voltage that either equals the replica DC voltage or differs from the replica DC voltage by a fraction of the replica DC voltage.

    Low voltage, highly accurate current mirror
    8.
    发明授权
    Low voltage, highly accurate current mirror 有权

    公开(公告)号：US09898028B2

    公开(公告)日：2018-02-20

    申请号：US14755435

    申请日：2015-06-30

    申请人： QUALCOMM Incorporated

    发明人： Masoud Roham ,  Liang Dai

    IPC分类号： G05F1/10 ,  G05F3/26 ,  G01R19/00 ,  H03F3/347 ,  H03F3/50

    CPC分类号： G05F3/262 ,  G01R19/0092 ,  H03F3/347 ,  H03F3/505 ,  H03F2200/453 ,  H03F2200/456 ,  H03F2200/474 ,  H03F2200/91

    摘要： Certain aspects of the present disclosure generally relate to a low voltage, accurate current mirror, which may be used for distributed sensing of a remote current in an integrated circuit (IC). One example current mirror typically includes a first pair of transistors, a second pair of transistors in cascode with the first pair of transistors, a switching network coupled to the second pair of transistors, and a third pair of transistors coupled to the switching network. An input node between the first and second pairs of transistors may be configured to receive an input current for the current mirror, and an output node at the first pair of transistors may be configured to sink an output current for the current mirror, proportional to the input current. This current mirror architecture offers a hybrid low-voltage/high-voltage solution, tolerates low input voltages, provides high output impedance, and offers low area and power consumption.

    Optical receiver with multiple transimpedance amplifiers
    10.
    发明授权
    Optical receiver with multiple transimpedance amplifiers 有权

    公开(公告)号：US09794001B2

    公开(公告)日：2017-10-17

    申请号：US14990723

    申请日：2016-01-07

    申请人： Fujitsu Limited

    发明人： Jian Hong Jiang

    IPC分类号： H04B10/61 ,  H03F3/45

    CPC分类号： H04B10/616 ,  H03F3/082 ,  H03F3/45475 ,  H03F3/45645 ,  H03F3/45753 ,  H03F2200/453 ,  H03F2203/45288

    摘要： 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.