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    SWITCH CONTROL CIRCUIT, MULTIPLEXER SWITCH CIRCUIT AND CONTROL METHOD FOR MULTIPLEXER SWITCH CONTROL CIRCUIT
    10.
    发明公开
    SWITCH CONTROL CIRCUIT, MULTIPLEXER SWITCH CIRCUIT AND CONTROL METHOD FOR MULTIPLEXER SWITCH CONTROL CIRCUIT 审中-公开

    公开(公告)号：EP3975405A1

    公开(公告)日：2022-03-30

    申请号：EP20913988.0

    申请日：2020-12-17

    申请人： Chipone Technology (Beijing) Co., Ltd.

    发明人： CHEN, Feixiang ,  LI, Weijiang ,  LI, Zhuo ,  YANG, Jun

    IPC分类号： H02M3/07 ,  H02M1/44

    摘要： A switch control circuit (10), a multiplexer switch circuit (20) and a control method for a multiplexer switch control circuit. The switch control circuit (10) comprises a first control switch (21), a first capacitor (22) and a field-effect transistor switch (23). When the first control switch (21) is switched off, a charging voltage released by the first capacitor (22) can control the switching-on of the field-effect transistor switch (23). At this moment, since the first control switch (21) is switched off, and a power source signal cannot reach a gate electrode of the field-effect transistor switch (23), power source noise cannot be coupled to a line where source and drain electrodes of the field-effect transistor switch (23) are located. Thus, in a discharge stage of the first capacitor (22), a discharge voltage can serve as a control signal to control the switching-on of the field-effect transistor switch (23), thereby reducing power source coupling noise.