US 12,425,027 B2
Systems, methods, and devices for sensor protection circuit
Xiaowei Zhang, Shanghai (CN)
Assigned to Cypress Semiconductor Corporation, San Jose, CA (US)
Filed by Cypress Semiconductor Corporation, San Jose, CA (US)
Filed on Jan. 11, 2024, as Appl. No. 18/410,591.
Prior Publication US 2025/0233587 A1, Jul. 17, 2025
Int. Cl. H03K 17/96 (2006.01); G06F 3/044 (2006.01)
CPC H03K 17/9622 (2013.01) [G06F 3/044 (2013.01); H03K 2217/960705 (2013.01); H03K 2217/96071 (2013.01); H03K 2217/960735 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method comprising:
providing, using a microcontroller unit (MCU), a drive signal to a touch sensor via an asymmetric conductance element of a protection circuit;
providing, using the MCU, a scanning signal to the touch sensor via an additional conductance element of the protection circuit;
receiving, at the MCU, a sense signal from the touch sensor via the additional conductance element of the protection circuit; and
determining, using the MCU, if a touch event has occurred based on measurements obtained during scanning of the touch sensor.