At the beginning, the discharge switch is in an open circuit state,
Period measurement utilizes the oscillator frequency as the gating signal for the pulse-width modulator (PWM) (Figure 3).
The software algorithm provides two intelligent functions. The first function converts the count values obtained from the measurement circuit into finger detection results,
Although the use of insulation layer may cause a decrease in overall sensitivity,
Capacitive touch technology offers users multiple advantages compared to the traditional resistive touch technology currently dominating the market,
It is not difficult to see from the above that currently, the consumer market dominated by small sizes only has two choices for touch technology:
