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:
Jun. 09, 1998
Filed:
Mar. 11, 1997
Applicant:
Inventors:
Scott O Frake, Cupertino, CA (US);
Philip D Costello, San Jose, CA (US);
Assignee:
Xilinx, Inc., San Jose, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365154 ; 365156 ;
Abstract
For a memory cell comprising a latch with cross-coupled inverters and an n-channel access transistor, the inverter that can contend with the access transistor is connected not between power and ground but between power and a transistor that disconnects the inverter from ground when the memory cell is being written. This allows transistors in the memory cell to be small and still function properly, without requiring that a port be provided for the complement of the data signal. The invention is important when there are several write ports to the memory cell and the addressing overhead is significant.