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:
Jan. 30, 2024
Filed:
Jan. 24, 2022
Applicant:
Pixart Imaging Inc., Hsin-Chu County, TW;
Inventors:
Chung-Min Thor, Penang, MY;
Kuan-Choong Shim, Penang, MY;
Assignee:
PIXART IMAGING INC., Hsin-Chu County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01P 3/36 (2006.01); G01P 3/486 (2006.01); G01D 5/249 (2006.01); G01D 5/347 (2006.01); G01D 5/34 (2006.01);
U.S. Cl.
CPC ...
G01P 3/36 (2013.01); G01P 3/486 (2013.01); G01D 5/249 (2013.01); G01D 5/34 (2013.01); G01D 5/34715 (2013.01);
Abstract
There is provided an optical encoder including a phase shifter circuit and a multiple hysteresis comparators. The phase shifter circuit receives four input signals, and outputs multiple phase shifted signals based on the four input signals. Each of the multiple hysteresis comparators uses a changeable operation hysteresis level to compare a couple of phase shifted signals among the multiple phase shifted signals, wherein the changeable operation hysteresis level is determined corresponding to a signal frequency of the four input signals.