CAPACITANCE SENSOR WITH IMPROVED NOISE FILTERING CHRACTERISTICS, METHOD AND COMPUTER-READABLE RECORDING MEDIUM FOR NOISE FILTERING OF CAPACITANCE SENSOR

摘要

PURPOSE: A capacitance sensor having an improved noise filtering property, a noise filtering method and a computer readable recording medium are provided to adjust a device value of a capacitance sensor, thereby implementing the capacitance sensor having a desired noise filtering property. CONSTITUTION: A first switch turns on/off connection between an input device receiving an input signal and one end of a detection capacitor. A second switch turns on/off connection between the other end of the detection capacitor and the ground. A third switch turns on/off connection between the one end of the detection capacitor and the ground. A fourth switch turns on/off connection between the other end of the detection capacitor and a first input device of a first amplifier. A variable capacitor is connected between the first input device and an output device of the first amplifier.