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:
Apr. 10, 2018
Filed:
Sep. 23, 2016
Applicant:
Altera Corporation, San Jose, CA (US);
Inventor:
Ker Yon Lau, Setia Pearl Island, MY;
Assignee:
Altera Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/017 (2006.01); H03K 5/156 (2006.01); H03K 19/21 (2006.01);
U.S. Cl.
CPC ...
H03K 5/1565 (2013.01); H03K 19/21 (2013.01);
Abstract
Duty cycle sampling circuitry is disclosed that may generate offsets that cancel each other out, thereby improving the accuracy of duty cycle sampling of input clock signals based on sampling clock signals. The input clock input signals may be swapped, or the sampling clock signals may be swapped, or both may be swapped, at various times. Erroneous samples obtained in one configuration can cancel out other erroneous samples obtained in another configuration.