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:
Jun. 12, 2018
Filed:
Dec. 15, 2016
Cadence Design Systems, Inc., San Jose, CA (US);
Scott David Huss, Cary, NC (US);
Loren Blair Reiss, Raleigh, NC (US);
CADENCE DESIGN SYSTEMS, INC., San Jose, CA (US);
Abstract
A circuit and method for adaptively controlling an equalizer circuit to reduce intersymbol interference at low frequencies relative to a transmit frequency of an input signal from a transmitter. The input signal is converted into a data signal by a receiver. At least one delayed data signal is formed by delaying the data signal by at least one unit interval (UI) beyond a length of a decision feedback equalizer (DFE) in the receiver. An error signal is formed by comparing the input signal to a threshold value. An error signal sample is correlated with at least one delayed data signal sample to determine whether to adjust a control coefficient of the equalizer. Thus the equalizer is controlled as if the DFE had at least one additional tap.