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:
Oct. 05, 2021
Filed:
Nov. 06, 2017
Applicant:
Mitutoyo Corporation, Kanagawa, JP;
Inventors:
Assignee:
MITUTOYO CORPORATION, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01D 5/34 (2006.01); G01D 5/347 (2006.01); G01D 5/244 (2006.01); G11C 27/02 (2006.01);
U.S. Cl.
CPC ...
G01D 5/34707 (2013.01); G01D 5/24428 (2013.01); G01D 5/34715 (2013.01); G11C 27/026 (2013.01); G01D 5/34746 (2013.01);
Abstract
A reference voltage generator circuit generates a reference voltage corresponding to a power supply voltage. A current/voltage converter circuit converts a photocurrent output by a photoreceiver into voltage, and outputs a voltage obtained by adding the converted voltage and the reference voltage. A sample and hold circuit holds a voltage of a capacitor in response to a sample and hold signal, the capacitor having the voltage input at one end and the reference voltage input at another end. An amplifier circuit outputs an output signal where a voltage held by the sample and hold circuit is amplified with the reference voltage as a reference.