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. 04, 2010
Filed:
Sep. 29, 2006
Mohammad S. Mobin, Orefield, PA (US);
Gary E. Schiessler, Allentown, PA (US);
Gregory W. Sheets, Breinigsville, PA (US);
Vladimir Sindalovsky, Perkasie, PA (US);
Lane A. Smith, Easton, PA (US);
Mohammad S. Mobin, Orefield, PA (US);
Gary E. Schiessler, Allentown, PA (US);
Gregory W. Sheets, Breinigsville, PA (US);
Vladimir Sindalovsky, Perkasie, PA (US);
Lane A. Smith, Easton, PA (US);
Agere Systems Inc., Allentown, PA (US);
Abstract
Methods and apparatus are provided for determining the threshold position of one or more latches employed for decision-feedback equalization. A threshold position of a latch employed by a decision-feedback equalizer is determined by constraining input data such that the input data only contains transitions from a first binary value; obtaining a plurality of samples of a single-sided data eye associated with the constrained input data; and determining a threshold position of the latch based on the samples. The constrained input data can comprise (i) transitions from a binary value of 1 to a binary value of 0 or 1; or (ii) transitions from a binary value of 0 to a binary value of 0 or 1. The size of the single-sided data eye can be obtained by analyzing a histogram associated with the single-sided data eye to identify a region having a constant hit count.