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:
Sep. 08, 1981
Filed:
May. 09, 1980
Giovanni Tamburelli, Turin, IT;
Abstract
An equalizer designed to correct both precursor and postcursor distortion in signal samples periodically obtained from a digital signal train comprises two parallel, mutually complementary circuit branches each including an upstream filter for linearly correcting one type of distortion and a downstream cell for nonlinearly compensating the other type of distortion. The compensating cell of the first branch includes an adder algebraically combining a feed-forward signal with a signal at least partly freed from postcursor interference in the corresponding upstream filter; the second branch includes another adder algebraically combining a feedback signal from its compensating cell with a prefiltered signal at least partly freed from precursor interference. Purged signals from both adders are combined in a summing stage followed by a decision unit which emits a quantized pulse to be used either directly as a decided symbol or as a source of corrective pulses for postcursor and precursor elimination in another linearly prefiltered sample.