37.3: A 10-Touch Capacitive-Touch Sensor Circuit with the Time-Domain Input-Node Isolation
Abstract
A 10-touch performance is achieved by using a mutual-capacitive touch sensor. To increase the immunity to display-generated noise, an integrator is used with the input node isolated from touch sensor panel (TSP) during the high-LCD-noise period, controlled by the gate-driver clock. This increases SNR by more than 15 dB.
