On-Chip Touch Sensor Interface Using Charge Pump Based Capacitance-to-Voltage Converter

摘要

This work describes an on-chip touch sensor interface using charge pump based capacitance-to-voltage converter. In this scheme, the touch panel capacitance is directly converted into a voltage level by the switched-capacitor charge pump, which does not require additional signal conditioning for detection. The proposed touch sensor interface is implemented with CMOS 0.35um technology.