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:
Feb. 28, 1989
Filed:
Aug. 05, 1987
Fujitsu Limited, Kanagawa, JP;
Abstract
A read only memory device including: a memory cell array having a plurality of memory cells each storing one of three states; selection means, connected to the memory cell array, for selecting a pair of the memory cells from the memory cell array simultaneously in accordance with an address signal; a first sense amplifier, operatively connected to one of the pair of the memory cells, for producing a three bit output corresponding to the state stored in the one of the pair of the memory cells selected by the selection means; and a second sense amplifier, operatively connected another of the pair of memory cells, for producing a three bit output corresponding to the state stored in the another of the pair of the memory cells selected by the selection means. The device further includes decoder means, connected to the first and second sense amplifiers, for receiving the three bit outputs of the first and second amplifiers and producing a binary three bit output corresponding to the states stored in the pair of memory cells.