Patent ID: 11947753
Assignee: SHENZHEN GOODIX TECHNOLOGY CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 4:
5. The touch driving circuit according to claim 4, further comprising a first voltage-bearing transistor and a second voltage-bearing transistor;
the first switching circuit further comprises a first MOS transistor; the second switching circuit further comprises a second MOS transistor; the fourth switching circuit further comprises a fourth MOS transistor; the fifth switching circuit further comprises a fifth MOS transistor; and the third switching circuit further comprises a third MOS transistor and a sixth MOS transistor;
the first MOS transistor, the sixth MOS transistor and the first voltage-bearing transistor are P-type MOS transistors, and the second MOS transistor, the third MOS transistor, the fourth MOS transistor, the fifth MOS transistor and the second voltage-bearing transistor are N-type MOS transistors;
a source of the first MOS transistor is connected to the first positive voltage, and a drain of the first MOS transistor is connected to a source of the first voltage-bearing transistor;
a source of the second MOS transistor is connected to the source of the first voltage-bearing transistor, and a drain of the second MOS transistor is connected to a first end of the first energy storage capacitor;
a source of the third MOS transistor is connected to the ground terminal GND, and a drain of the third MOS transistor is connected to the source of the first voltage-bearing transistor;
a source of the fourth MOS transistor is connected to a first end of the second energy storage capacitor, and a drain of the fourth MOS transistor is connected to a source of the second voltage-bearing transistor;
a source of the fifth MOS transistor is connected to the first negative voltage, and a drain of the fifth MOS transistor is connected to the source of the second voltage-bearing transistor;
a source of the sixth MOS transistor is connected to the ground terminal GND, and a drain of the sixth MOS transistor is connected to the source of the second voltage-bearing transistor;
second ends of the first energy storage capacitor and the second energy storage capacitor are both connected to the ground terminal GND; and drains of the first voltage-bearing transistor and the second voltage-bearing transistor are both connected to the touch electrode; and
the first voltage-bearing transistor is configured to prevent voltages at two ends of the first MOS transistor, the second MOS transistor and the third MOS transistor from exceeding a withstand voltage; and the second voltage-bearing transistor is configured to prevent voltages at two ends of the fourth MOS transistor, the fifth MOS transistor and the sixth MOS transistor from exceeding a withstand voltage.