Electric capacity measuring device for touch control device

The present invention relates to a capacitance measuring apparatus, comprising a charging control unit for charging of a capacitor to be measured; a discharge control unit for discharging the capacitor under test; a first switch, according to a first switch signal coupling between the control unit and the charging of the capacitor under test; and a second switch for connecting between the capacitor under test according to a second switch signal for controlling the discharge control unit; a first modulo converter for converting the voltage to a first capacitor on the measurement signal; and a period detection circuit for converting the voltage of a count value of the measured capacitance, to an output of the processing unit, the count It represents the capacitance value of the capacitance to be measured.