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. 25, 1992
Filed:
Jun. 13, 1989
Applicant:
Inventor:
James B Hobbs, Minneapolis, MN (US);
Assignee:
Atmel Corporation, San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ; G11C / ;
U.S. Cl.
CPC ...
365155 ; 365156 ; 36523005 ; 3652256 ;
Abstract
A multiple port memory includes memory cells with merged PNP and NPN bipolar transistors. Each memory cell has a pair of PNP load transistors and a pair of NPN control transistors in a symmetric arrangement. One or more storage ports provides differential signals on two lines which can modify current flow in the memory cell. Similarly, one or more retrieval ports can be connected to two lines connected to the memory cell for reading current flow in the memory cell.