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. 06, 1985
Filed:
Oct. 29, 1981
David R Thomas, Lexington, KY (US);
Paul C Tien, Redondo Beach, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In response to a periodic pulse on a lead (21) an FET (47) connected gate-to-drain is driven in a low current circuit, producing a threshold potential on node F. This is connected through switch FETs (61) to the word lines (1) of a memory. This holds the gates of memory access switches (5) at threshold. A higher voltage on the bit line (7) takes off charge in memory cells (40) which have drifted from zero charge stored toward the substrate voltage. Absence of the periodic signal activates an FET (59) which grounds node F. High voltage applied to a word line (1) switches off the FET (61) connecting that line to node F.