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. 09, 2002
Filed:
Dec. 18, 1998
Applicant:
Inventors:
Robert W. Young, Ely, GB;
James D. Collier, Ely, GB;
Assignee:
3Com Technologies, Georgetown, KY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03H 7/30 ; H03H 7/40 ; H03K 5/159 ;
U.S. Cl.
CPC ...
H03H 7/30 ; H03H 7/40 ; H03K 5/159 ;
Abstract
A decision feedback encoder comprising an analog-to-digital converter for converting an input signal into digital signals representing decision levels, digital processing circuits responsive to signals from the converter for providing a succession of symbol values and a set of coefficients, digital-to-analog converters for converting the coefficients into corresponding analog values and analog circuits for forming a sum of the products of each of the symbol values and a respective one of said analog values to provide a feedback signal for the reduction of inter-symbol interference in the input signal.