CAPACITANCE VOLTAGE CONVERSION CIRCUIT, INPUT APPARATUS USING THE SAME, ELECTRONIC INSTRUMENT, AND CAPACITANCE VOLTAGE CONVERSION METHOD

摘要

PURPOSE: A capacity voltage conversion circuit, an input unit using the same, an electronic device, and a capacity voltage transforming method are provided to detect capacity of a plurality of sensor electrodes at the same time. CONSTITUTION: A plurality of capacity current converter circuits is installed in each sensor capacitance and creates detection current according to a capacity value of the sensor capacitance. A current averaging circuit(20) levels the detection current created by the plurality of capacity current converter circuits and creates an average current. A plurality of current-voltage converter circuits is installed in the each sensor capacitance and changes a difference current with the detection current and the average current into a voltage.