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:
Apr. 05, 2011
Filed:
Feb. 25, 2009
Applicants:
Ingming Chang, San Jose, CA (US);
Karl Lin Wang, Los Altos, CA (US);
Inventors:
Ingming Chang, San Jose, CA (US);
Karl Lin Wang, Los Altos, CA (US);
Assignee:
ARM Limited, Cambridge, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/40 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method of converting a static random access memory cell to a read only memory cell and the cell thus converted is disclosed. The cell to be converted comprises a data retention portion powered by a higher and lower voltage supply line and four transistors arranged as two cross coupled inverters. It is converted to a read only memory cell by severing a connection between at least one of said transistors within a first of said two inverters and one of said voltage supply lines such that when powered said first inverter outputs a predetermined value.