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:
May. 18, 2010
Filed:
Nov. 09, 2006
Viet Linh DO, Carlsbad, CA (US);
Mehmet Mustafa Eker, San Marcos, CA (US);
Simon Pang, San Diego, CA (US);
Viet Linh Do, Carlsbad, CA (US);
Mehmet Mustafa Eker, San Marcos, CA (US);
Simon Pang, San Diego, CA (US);
Applied Micro Circuits Corporation, San Diego, CA (US);
Abstract
A system and method are provided for automatically acquiring a serial data stream clock. The method receives a serial data stream with an unknown clock frequency and coarsely determines the clock frequency. The frequency is coarsely determined by (initially) selecting a high frequency first reference clock (Fref), and counting the number of data transitions in a first time segment of the serial data stream at a plurality of sample frequencies equal to Fref/n, where n is an integer≧1. The count for each sampling frequency is compared to the count for Fref(n=1). Next, the highest sampling frequency (n=x) is determined, which has a lower count than Fref, and the coarse clock frequency is set to Fc=Fref/(x−1).