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:
Oct. 14, 1980
Filed:
Jan. 24, 1979
Ronald G Neale, Beeches, GB;
Grady M Wood, Melbourne, FL (US);
Harris Corporation, Melbourne, FL (US);
Abstract
The Write/Erase lifetime of amorphous memory devices are extended by applying an erase pulse sequence having a first plurality of reset voltage pulses having a maximum amplitude less than the maximum threshold of the device to produce first amplitude current pulses and a second plurality of reset voltage pulses having a maximum amplitude greater than the maximum threshold to produce second amplitude current pulses having an amplitude substantially less than said current pulses. Constant current sources apply the two current pulses when the device threshold is below the maximum voltage amplitude of the first reset voltage pulses and only the second amplitude current pulses when the device threshold exceeds the maximum voltage amplitude of the first reset voltage pulses.