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:
Aug. 23, 2011
Filed:
Dec. 21, 2009
Tulsi Manickam, Rancho Pensaquitos, CA (US);
Peter J. Sallaway, San Diego, CA (US);
Sreen A. Raghavan, La Jolla, CA (US);
Abhijit M. Phanse, Cupertino, CA (US);
James B. Wieser, Pleasanton, CA (US);
Tulsi Manickam, Rancho Pensaquitos, CA (US);
Peter J. Sallaway, San Diego, CA (US);
Sreen A. Raghavan, La Jolla, CA (US);
Abhijit M. Phanse, Cupertino, CA (US);
James B. Wieser, Pleasanton, CA (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An analog equalizer (and) adaptively equalizes an input analog signal affected with intersymbol interference ('ISI'), or an intermediate analog signal generated therefrom, to produce a filtered partially equalized analog signal with reduced ISI. An analog-to-digital converter () converts the filtered analog signal, or an intermediate analog signal generated therefrom, into an initial digital signal. A digital equalizer () adaptively equalizes the initial digital signal, or an intermediate digital signal generated therefrom, to produce an equalized digital signal as a stream of equalized digital values with further reduced ISI. An output decoder () decodes the equalized digital values, or intermediate digital values generated therefrom, into a stream of symbols. Equalization control circuitry (and) adjusts equalization filter characteristics of the equalizers such that adjustments of the filter characteristics of one of the equalizers depend adaptively on adaptive adjustments of the filter characteristics of the other equalizer.