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:
Jul. 27, 2021
Filed:
Nov. 15, 2018
Applicant:
Ablic Inc., Chiba, JP;
Inventor:
Daisuke Muraoka, Chiba, JP;
Assignee:
ABLIC INC., Chiba, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01N 27/22 (2006.01); H03K 17/955 (2006.01); G01R 27/26 (2006.01); G01B 7/06 (2006.01); G03G 15/00 (2006.01);
U.S. Cl.
CPC ...
G01N 27/22 (2013.01); G01R 27/2605 (2013.01); G03G 15/5029 (2013.01); H03K 17/955 (2013.01);
Abstract
To reduce effects of noise and improve detection accuracy, a sensor device includes: a detection electrode opposing an external electrode to which a predetermined voltage is applied, and configured to generate a voltage corresponding to a change in electrostatic capacitance; and a capacitive amplifier circuit having a first capacitor and a second capacitor connected in series to each other, and configured to detect the voltage generated in the detection electrode, and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor.