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:
Aug. 31, 2021
Filed:
Jun. 22, 2020
Applicant:
Pixart Imaging Inc., Hsin-Chu County, TW;
Inventors:
Assignee:
PIXART IMAGING INC., Hsin-Chu County, TW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/13 (2014.01); H04J 14/00 (2006.01); H03M 1/20 (2006.01); H03K 5/24 (2006.01); H03K 5/00 (2006.01);
U.S. Cl.
CPC ...
H03K 5/13 (2013.01); H03K 5/24 (2013.01); H03M 1/206 (2013.01); H04J 14/005 (2013.01); H03K 2005/00052 (2013.01); H03K 2005/00286 (2013.01);
Abstract
There is provided a phase shifter circuit of an optical encoder that receives four signals generated from photodiodes. The phase shifter circuit includes four resistor strings each coupled to two of the four signals having a 90-degrees phase pitch. By taping out different numbers of signals at different tape-out nodes of each of the four resistor strings, the phase shifter circuit is adapted to output signals for different interpolation factors without changing the mask set.