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:
Mar. 10, 2009
Filed:
Mar. 30, 2004
Applicants:
Eric T. King, San Jose, CA (US);
Douglas Pastorello, Hudson, NH (US);
Inventors:
Eric T. King, San Jose, CA (US);
Douglas Pastorello, Hudson, NH (US);
Assignee:
Silicon Laboratories Inc., Austin, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 7/00 (2006.01); H04L 7/033 (2006.01);
U.S. Cl.
CPC ...
Abstract
A frequency detector and frequency-locked loop suitable for use in a clock recovery circuit are disclosed. The detector is linear, and can be used in implementing a loss of lock indicator. Variable delay filtering permits the frequency detector to be less sensitive to data fluctuations, and random or pseudo random addition of jitter helps address low gain in the data stream. A VCO controller cycles through a number of control states and provides varying levels of gain, dither and delay during each of the control states.