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:
Dec. 30, 2014
Filed:
Aug. 29, 2013
Xilinx, Inc., San Jose, CA (US);
Michael O. Jenkins, San Jose, CA (US);
Cheng-Hsiang Hsieh, San Jose, CA (US);
Xilinx, Inc., San Jose, CA (US);
Abstract
In an apparatus, a receiver includes a clock data recovery module to provide a dense distribution of waveform edges across an adjustment range, and an eye scan circuit to obtain samples at a first sample position and a second sample position to provide an error count for a sample count for the samples. An eye scan module, coupled to the receiver, is configured to: scan for the samples at the first sample position of a first type for each of a plurality of sample positions of a second type to obtain an error count for a sample count for each of the plurality of sample positions; locate a threshold BER from the scan; determine an amount and a direction of a sample offset at the threshold BER from a reference location; and adjust either the first sample position or the second sample position responsive to the amount and the direction.