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:
Apr. 13, 2010
Filed:
Oct. 18, 2004
Shoujun Wang, Kanta, CA;
Tad Kwasniewski, Ottowa, CA;
Bill Bereza, Nepean, CA;
Altera Corporation, San Jose, CA (US);
Abstract
Equalization circuitry that includes an analog equalizer and a decision feedback equalizer (DFE) is provided for high-speed backplane data communication. The analog equalizer reduces the number of taps that are required by the DFE, which lessens the error propagation of the DFE. Furthermore, the DFE includes a summing circuit and flip-flop circuitry. The flip-flop circuitry may be used as part of a phase detector by clock and data recovery circuitry. The summing circuit may further be embedded into the flip-flop circuitry to reduce the feedback path delay, thereby allowing for higher speed operation. The DFE may be extended to multiple taps by including additional flip-flops.