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:
Dec. 08, 2015
Filed:
Jan. 19, 2015
International Business Machines Corporation, Armonk, NY (US);
Eugene R. Atwood, Housatonic, MA (US);
Matthew B. Baecher, Newburgh, NY (US);
Minhan Chen, Cary, NC (US);
Hayden C. Cranford, Jr., Cary, NC (US);
William R. Kelly, Verbank, NY (US);
Todd M. Rasmus, Cary, NC (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Testing a Decision Feedback Equalizer ('DFE'), the DFE including a summing amplifier operatively coupled to a plurality of latches and an input signal line for receiving a data signal, including: preventing a differential data signal from being received by the summing amplifier; and iteratively for each tap to be tested: setting a tap coefficient for each tap to zero; setting an output of the plurality of latches to a predetermined value; setting a tap coefficient for the tap to be tested to a full scale value; and determining whether a resultant output signal from the DFE matches a predetermined expected output signal.