公开(公告)号：US20220021387A1

公开(公告)日：2022-01-20

申请号：US17222271

申请日：2021-04-05

Applicant: SENSORTEK TECHNOLOGY CORP.

Inventor： WANG-AN LIN ,  MING-CHE YANG ,  MIN-CHUN TUAN ,  CHUNG-JUNG WU

IPC: H03K17/955 ,  H03K17/96

Abstract: The present application provides a proximity detection method and circuit thereof. The circuit includes a detection circuit, a baseline generating circuit, and a proximity sensing circuit. The proximity sensing circuit generates a proximity signal according to a detection data generated by the detection circuit, a baseline data generated by the baseline generating circuit and a proximity threshold, and judges whether the proximity signal is valid according to the detection data, a reference data, and a valid threshold. The validity of the proximity signal may be judged according to the reference data and the valid threshold and thus avoiding false judgement caused by the influences of the ambient factors.