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:
Jul. 09, 1985
Filed:
May. 04, 1983
Gary D Burns, Cottage Grove, MN (US);
Donald W Mackenthun, Fridley, MN (US);
Scott D Schaber, St. Paul, MN (US);
Sperry Corporation, New York, NY (US);
Abstract
An improved dynamic memory system including through-checking and error detection of the refresh counter is described. A refresh counter that provides parity of the refresh count for through-checking, of refresh addresses is shown. Error detecting circuitry is utilized in conjunction with the refresh counter and the parity generating circuitry to detect errors in functionality of the refresh counter. The refresh counter is a Gray code counter constructed of a double rank of latches operable with code generating logic circuits for determining the sequence of generation of Gray code groupings.