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:
Jan. 26, 1999
Filed:
Apr. 24, 1996
Toshihiko Mori, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A semiconductor memory has bit lines, word lines, ground lines, and memory cells. The bit lines intersect the word and ground lines, to form intersections where the memory cells are arranged, respectively. Each of the memory cells consists of a double-emitter transistor. This transistor has a collector, a first emitter, and a second emitter. Each base-emitter junction of the transistor has an N-shaped negative differential current-voltage characteristic that shows a relatively small gain up to a peak current and a relatively large gain after a valley current. The first emitter of each transistor is connected to a corresponding one of the ground lines. The second emitter is connected to a corresponding one of the word lines. The collector is connected to a corresponding one of the bit lines. Each of the memory cells has a small number of elements and requires only a small area.