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. 01, 2014
Filed:
Sep. 19, 2011
Vladimir Sindalovsky, Perkasie, PA (US);
Lane A. Smith, Easton, PA (US);
Brett D. Hardy, Chaska, MN (US);
Jeffrey S. Kueng, New Brighton, MN (US);
Vladimir Sindalovsky, Perkasie, PA (US);
Lane A. Smith, Easton, PA (US);
Brett D. Hardy, Chaska, MN (US);
Jeffrey S. Kueng, New Brighton, MN (US);
LSI Corporation, Milpitas, CA (US);
Abstract
In described embodiments, a receiver includes a clock and data recovery (CDR) circuit with a voltage control oscillator (VCO) having proportional and integral loop control, and a Lock to Reference (L2R) mode circuit using Phase and Frequency Detector (PFD) control of the VCO during the absence of input data to the CDR. A regular CDR second order loop incorporating PFD control of the VCO during the absence of input data to the CDR achieves relatively rapid lock to reference when compared to counter-based lock to reference mode of operation.