公开(公告)号：US20190195703A1

公开(公告)日：2019-06-27

申请号：US16182188

申请日：2018-11-06

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Masato HIRAI ,  Takeshi YOSHIZAWA ,  Takeshi KUWANO

IPC: G01L1/14

CPC classification number: G01L1/144 ,  G01L1/146

Abstract: To improve the efficiency of pressure detection, a driver applies a positive-phase signal to a capacitance element from an opposite side to a coupling point in a control device. Another driver applies a reverse-phase signal to another capacitance element from an opposite side to the coupling point. A control unit detects pressures applied to the capacitance elements based on a potential fluctuation at the coupling point.