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:
May. 14, 1991
Filed:
Jan. 14, 1987
Applicant:
Inventor:
Samir M Laymoun, Sunnyvale, CA (US);
Assignee:
Fairchild Semiconductor Corporation, Culpertino, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365154 ; 365155 ; 36518906 ; 36523005 ; 365226 ;
Abstract
Two pairs of bit lines are associated with each column of memory cells in a static random access memory (RAM) to provide separate paths for reading and writing operations or to provide a RAM having dual read ports. One pair of bit lines is connected to the emitters of the cross-coupled transistors in each cell to permit write operations to be carried out. The second pair of bit lines is connected to the collectors of clamping transistors which limit the collector voltage of the cell transistors, to permit data to be read.