The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 06, 2022
Filed:
Feb. 26, 2021
Applicant:
Tokyo Parts Industrial Co., Ltd., Gunma-ken, JP;
Inventor:
Mamoru Kubo, Gunma-ken, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 17/955 (2006.01); H03K 17/95 (2006.01); G01D 5/241 (2006.01); H03K 17/96 (2006.01);
U.S. Cl.
CPC ...
H03K 17/955 (2013.01); G01D 5/241 (2013.01); H03K 17/9537 (2013.01); H03K 2017/9606 (2013.01);
Abstract
A capacitive proximity sensor of the present invention principally comprises a sensor electrode, a sensor circuit, a detection circuit, and a microcomputer. The sensor circuit has an LC parallel circuit and an LC series resonant circuit. Furthermore, the single sensor electrode is connected in parallel with the LC parallel circuit. By decreasing the drive voltage applied to the sensor electrode, the radiated noise generated by the sensor electrode is also decreased. In addition, foot detection sensitivity can be improved by amplifying the detection signal with the LC series resonant circuit.