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:
Jul. 08, 1986
Filed:
Jun. 28, 1983
Applicant:
Inventors:
Kouji Ueno, Kawasaki, JP;
Tamio Miyamura, Kawasaki, JP;
Assignee:
Fujitsu Limited, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365189 ; 365104 ;
Abstract
A semiconductor memory device includes control circuits which are at least a switching circuit and program circuits provided with a constant current source. The switching circuit is mainly comprised of an input side transistor and an output side transistor in the form of a thyristor, and both transistors are on only when a write operation is conducted by the program circuits and the constant current source. If no write operation is conducted, these transistors are both off.