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:
Oct. 12, 2010
Filed:
Mar. 02, 2009
Christopher Abel, Coplay, PA (US);
Mohammad Mobin, Orefield, PA (US);
Robert Kapuschinsky, Hazelton, PA (US);
Lane Smith, Easton, PA (US);
Paul Tracy, Schnecksville, PA (US);
Gregory Sheets, Bedford, MA (US);
Christopher Abel, Coplay, PA (US);
Mohammad Mobin, Orefield, PA (US);
Robert Kapuschinsky, Hazelton, PA (US);
Lane Smith, Easton, PA (US);
Paul Tracy, Schnecksville, PA (US);
Gregory Sheets, Bedford, MA (US);
LSI Corporation, Milpitas, CA (US);
Abstract
In described embodiments, a communication system employing, for example, clock and data recovery (CDR) detects and applies correction for DC offset in an input data stream signal, termed as 'DC offset calibration'. DC offset calibration applies static calibration for DC offset in input circuits, such as an input amplifier and detection latches, without input data, and applies statistical calibration for DC offset during operation with an input data stream to correct for dynamic shifts in DC level. Such DC offset calibration employs data eye measurements of the input data stream for detection of DC offset, and applies an opposite DC offset to maintain a relatively balanced data eye during live traffic.