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. 20, 2011
Filed:
Sep. 14, 1990
Joseph T. Evans, Jr., Albuquerque, NM (US);
William D. Miller, Rio Rancho, NM (US);
Richard H. Womack, Albuquerque, NM (US);
Joseph T. Evans, Jr., Albuquerque, NM (US);
William D. Miller, Rio Rancho, NM (US);
Richard H. Womack, Albuquerque, NM (US);
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A non-volatile memory cell and related system utilize ferroelectric capacitors as data storage elements. Circuitry is provided for writing to a single ferroelectric capacitor storage element, as well as to dual storage elements operating inversely. The storage elements are read by use of a sense amplifier in a configuration which automatically restores the original data states, thereby eliminating the need for a subsequent restore operation. Memory systems are described which include circuitry for driving bit lines, word lines and drive lines to accomplish both the write and read operations.