Patent ID: 9658270
Date: 2017-05-23
CPC Classifications: G01N,G01R,H01L,H04L

Claim:
1. An inspection method of a sensor device including: a sensor unit having a first capacitive sensor element connected between a first driving terminal and a signal terminal and a second capacitive sensor element connected between a second driving terminal and the signal terminal; a first driving circuit configured to output a first driving voltage or a second driving voltage to the first driving terminal; a second driving circuit configured to output the first driving voltage or the second driving voltage to the second driving terminal; a capacitor having a first end connected to the signal terminal and a second end; an amplifier circuit configured to output an amplified voltage to the second end of the capacitor by amplifying a difference between a voltage of the signal terminal and a reference voltage such that the voltage of the signal terminal becomes close to the reference voltage; and a switching circuit configured to discharge electric charges accumulated in the capacitor, the inspection method comprising: a first inspection stage including: