Patent ID: 11953350
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G

Claim 13:
14. The capacitance detection apparatus according to claim 11, wherein the switch module comprises a third switch, a fourth switch, and a fifth switch;
the third switch is connected between the first sensing unit and a first connecting terminal, and the control logic circuit is configured to control the first sensing unit to be connected with the first connecting terminal, or control the first sensing unit to be grounded through the third switch;
the fourth switch is connected between the second sensing unit and the first connecting terminal, and the control logic circuit is configured to control the second sensing unit to be connected with the first connecting terminal, or control the second sensing unit to be grounded through the fourth switch;
the fifth switch is connected between the first connecting terminal and the differential detection circuit, and the control logic circuit is configured to control the first connecting terminal to be connected with the excitation circuit, or control the first connecting terminal to be connected with the differential detection circuit through the fifth switch.