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:
Nov. 25, 1997
Filed:
Jan. 17, 1996
Applicant:
Inventor:
Larry E Nielsen, Chicago, IL (US);
Assignee:
Zenith Electronics Corporation, Glenview, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K / ; H04N / ;
U.S. Cl.
CPC ...
375232 ; 348725 ;
Abstract
A digital receiver receives a multi level symbol signal that includes a frame sync. An equalizer is supplied with the signal and corrects for errors that are determined to exist therein on the basis of comparing the frame sync with a known value thereof or comparing the average level of the multi level symbols to an estimated (known) value thereof. A threshold circuit is included for rejecting impulse noise in the error signal that exceeds a threshold level that is higher than the maximum symbol level in the symbol.