Systems, methods, and devices for sensor protection circuit
AssigneeCypress Semiconductor Corporation
InventorXiaowei Zhang
Life of this patent
Estimating the term…
Abstract
Systems, methods, and devices provide protection for sensing circuits. Methods may include 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, and receiving, at the MCU, a sense signal from the touch sensor via the additional conductance element of the protection circuit. Methods also include determining, using the MCU, if a touch event has occurred based on measurements obtained during scanning of the touch sensor.
Claims20
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.
A system comprising:
- a touch sensor comprising a plurality of sensing elements;
- a protection circuit coupled to the touch sensor, the protection circuit comprising an asymmetric conductance element and an additional conductance element;
- and
- a microcontroller unit (MCU) configured to:
- provide a drive signal to the touch sensor via the asymmetric conductance element;
- provide a scanning signal to the touch sensor via the additional conductance element;
- receive a sense signal from the touch sensor via the additional conductance element;
- and
- determine if a touch event has occurred based on measurements obtained during scanning of the touch sensor.
A device comprising:
- a protection circuit comprising an asymmetric conductance element and an additional conductance element;
- and
- one or more processing elements configured to:
- provide a drive signal to a touch sensor via the asymmetric conductance element;
- provide a scanning signal to the touch sensor via the additional conductance element;
- receive a sense signal from the touch sensor via the additional conductance element;
- and
- determine if a touch event has occurred based on measurements obtained during scanning of the touch sensor.
Dependencies are inferred from the claim text.