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:
Nov. 29, 1983
Filed:
Dec. 29, 1982
Jai P Bansal, Manassas, VA (US);
IBM Corporation, Armonk, NY (US);
Abstract
An asymmetric RAM cell is disclosed which will have a predictable initial storage state when pulsed drain voltage is turned on and yet after the initial turn-on interval, will operate in a symmetric fashion storing either binary ones or zeros. Thus, an initial prestored set of information can be permanently provided in a memory array made up of such cells, by orienting each individual cell at the time of manufacture so as to selectively represent either a binary one or zero. This is illustrated in the FIGURE where the upper cell has a first state by virtue of its orientation and the lower cell has a second, opposite state by virtue of its relative opposite orientation. When the array is turned on, the upper cell will have the opposite binary state from the lower cell. Thereafter, each cell can be respectively switched for storing ones and zeros in a normal RAM operating mode.