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2886 条记录 (耗时 0.038 秒)

    Apparatus and methods for amplifier input-overvoltage protection with low leakage current
    1.
    发明授权
    Apparatus and methods for amplifier input-overvoltage protection with low leakage current 有权

    公开(公告)号：US12132452B2

    公开(公告)日：2024-10-29

    申请号：US16946090

    申请日：2020-06-05

    申请人： Analog Devices, Inc.

    发明人： Arthur J. Kalb ,  Yoshinori Kusuda

    IPC分类号： H03F1/52 ,  H02H3/20 ,  H02M1/32

    CPC分类号： H03F1/52 ,  H02H3/20 ,  H02M1/32 ,  H03F2200/441

    摘要： Apparatus and methods for amplifier input-overvoltage protection with low leakage current are provided herein. In certain embodiments, amplifier input circuitry for an amplifier includes a pair of input terminals, a pair of input transistors each having a control input (for instance, a transistor gate), a pair of protection transistors each connected between one of the input terminals and the control input of a corresponding one of the input transistors, and a bidirectional clamp connected between the control inputs of the input transistors. Implementing the amplifier input circuitry in this manner provides a number of advantages including, but not limited to, robust protection against input overvoltage and low input-leakage current.

    ELECTRONIC FUSE CIRCUIT AND CIRCUIT SYSTEM USING THE SAME
    5.
    发明公开
    ELECTRONIC FUSE CIRCUIT AND CIRCUIT SYSTEM USING THE SAME 审中-公开

    公开(公告)号：US20240291264A1

    公开(公告)日：2024-08-29

    申请号：US18584369

    申请日：2024-02-22

    申请人： Joulwatt Technology Co., Ltd.

    发明人： Pitleong WONG

    IPC分类号： H02H3/20 ,  H02H3/087 ,  H02H7/12

    CPC分类号： H02H3/202 ,  H02H3/087 ,  H02H7/12

    摘要： The present application discloses an electronic fuse circuit and a circuit system using the same. During startup operation, the circuit system using the electronic fuse circuit of the present application detects an amplitude of the load voltage by a second protection circuit, when the voltage exceeds a set second threshold signal, the electronic fuse circuit is controlled to be turned off; during normal operation, a current of a path where the electronic switch is located is monitored by a first protection circuit to prevent a current of the circuit system from overcurrent. According to the technical solution of the present disclosure, the load can be prevented from damage caused by a failure such as short circuit and electricity leakage of the switch power supply, and the system can be protected from overcurrent.

    Discharge control circuit and power conversion device
    8.
    发明授权
    Discharge control circuit and power conversion device 有权

    公开(公告)号：US11979095B2

    公开(公告)日：2024-05-07

    申请号：US17638403

    申请日：2020-07-31

    申请人： Hitachi Astemo, Ltd.

    发明人： Norio Murayama ,  Takeshi Yoshida ,  Takahiro Nishida ,  Itsuro Nomura

    IPC分类号： H02M1/32 ,  H02H3/20 ,  H02H9/04 ,  H02M7/537

    CPC分类号： H02M7/537 ,  H02H3/202 ,  H02H9/041 ,  H02M1/322

    摘要： An object of the present invention is to provide a power conversion device capable of specifying a failure location of an inverter in detail when an attempt of active discharge fails. There are provided an arithmetic operation circuit 102 that outputs a discharge instruction to control a discharge operation based on a voltage between both ends of a discharge circuit, and an output circuit 203 that outputs a drive signal based on the control signal. The arithmetic operation circuit 102 monitors an amount of the decreased voltage between both the ends of the discharge circuit, an LV read back signal being an output of the arithmetic operation circuit 102, and an HV read back signal being an output of the output circuit 203, and specifies a failure location.

    Output impedance and load independent latch-off timer for voltage-limit mode protection
    9.
    发明授权
    Output impedance and load independent latch-off timer for voltage-limit mode protection 有权

    公开(公告)号：US11949224B2

    公开(公告)日：2024-04-02

    申请号：US17704089

    申请日：2022-03-25

    申请人： Timothy T. Hsia ,  Victor K. Lee

    发明人： Timothy T. Hsia ,  Victor K. Lee

    IPC分类号： H02H3/20 ,  H02H1/00

    CPC分类号： H02H3/20 ,  H02H1/0007

    摘要： One example includes a power supply system. The system includes a voltage-limit power regulator to generate an output voltage and an instantaneous overvoltage sensor configured to detect an overvoltage condition associated with the output voltage. The system further includes an overvoltage latch-off timer system configured to initiate a latch-off timer in response to detecting the overvoltage condition. The latch-off timer can be uninterrupted by an amplitude of the output voltage. The overvoltage latch-off timer system can further be configured to detect a persistent overvoltage fault in response to detecting the overvoltage condition after expiration of the latch-off timer. The overvoltage latch-off timer system can be configured to generate a fault signal to disable the voltage-limit power regulator in response to detecting the persistent overvoltage fault.

    Safety control circuit and automobile emergency starting clamp provided with same
    10.
    发明授权
    Safety control circuit and automobile emergency starting clamp provided with same 有权

    公开(公告)号：US11929606B2

    公开(公告)日：2024-03-12

    申请号：US17894165

    申请日：2022-08-24

    申请人： Dongguan Hang Che Bao Future Technology Co., Ltd.

    发明人： Guozhi Zeng

    IPC分类号： H02H3/20 ,  F02N11/12 ,  H02H5/04 ,  H02J7/00

    CPC分类号： H02H3/20 ,  F02N11/12 ,  H02H5/04 ,  H02J7/0029 ,  H02J7/00308 ,  H02J7/00309 ,  H02J7/0047

    摘要： The present disclosure discloses a safety control circuit and an automobile emergency starting clamp provided with the same. The safety control circuit is integrated with an EC5 input module, an ignition clip module, a relay module, a timing control module, an input high-voltage protection module, a voltage-stabilizing power supply module, an input low-voltage protection module, a high-temperature protection module, a low-temperature protection module, an error alarm module, a first timing module, a second timing module and a light display module, and has fast response and high safety. The automobile emergency starting clamp provided with the circuit includes an anode cable clamp, a cathode cable clamp and a control box; and the control box includes a control box upper shell, a control box lower shell, an on/off button and the above-mentioned safety control circuit.