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:
Feb. 02, 2021
Filed:
Apr. 22, 2019
Applicant:
Ablic Inc., Chiba, JP;
Inventors:
Assignee:
ABLIC INC., Chiba, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01R 19/175 (2006.01); G01D 5/14 (2006.01);
U.S. Cl.
CPC ...
G01R 19/175 (2013.01); G01D 5/14 (2013.01);
Abstract
A zero cross detection circuit has a first comparator circuit receiving a first input signal and a second input signal and outputting a first comparison result, a second comparator circuit having a hysteresis function, receiving the first input signal and the second input signal, and outputting a second comparison result, a power supply voltage detection circuit outputting a detection signal when a power supply voltage to be supplied becomes equal to or larger than a predetermined voltage, and a logic circuit outputting a zero cross detection signal based on the first comparison result, the second comparison result, and the detection signal.