Patent ID: 11719663

Abstract:
To provide a measuring apparatus that can detect a wide range of capacitance values with high sensitivity. The measuring apparatus includes an alternating-current signal generator that generates N (where N is a natural number not less than 2) detection alternating-current signals with different frequencies, a superpositioner that superposes the N detection alternating-current signals, multiplication processors that respectively multiply the N detection alternating-current signals with different frequencies by a measurement alternating-current signal output from a device under test to which a detection alternating-current signal obtained through the superposition has been applied, thereby obtaining N synchronous detection signals, low-pass filter processors that perform a low-pass filter process on the N synchronous detection signals to obtain N direct-current voltage signals, and a capacitance measurer that measures as the capacitance value of the device under test a capacitance value corresponding to the voltage values of the N direct-current voltage signals.