| 摘要 |
PROBLEM TO BE SOLVED: To provide a pressure-sensitive capacitive sensor for reliably capturing minute capacity without any influence of noise and without any problems of a leakage current and feedthrough in a transistor for switching. SOLUTION: In the pressure-sensitive capacitive sensor, a plurality of row wires and column wires are formed in a matrix in a sensor section 2, and capacity at the intersection of each wire is changed according to pressure applied externally. A detection signal generation section 3 successively outputs a pulse signal at a specified frequency to the row wires of the sensor section 2, filters 4i-1, 4i, and 4i+1 are provided at each column wire of the sensor section 2, and amplitude proportional to each capacity of a signal at a specified frequency is extracted. COPYRIGHT: (C)2005,JPO&NCIPI |
