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. 07, 1994
Filed:
Dec. 04, 1992
Applicant:
Inventor:
Robert K Montoye, Los Gatos, CA (US);
Assignee:
HaL Computer Systems, Inc., Campbell, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365 49 ; 36518901 ; 36518907 ;
Abstract
A content addressable memory cell is able to store a state representing 'Don't Care', by storing two bits of data. The 'Don't Care' state is indicated by storing two identical bits corresponding to a predetermined value, so that the cell indicates a match regardless of the match data. When the cell is not in the 'Don't Care' state, two complementary bits are stored, so that the cell indicates a match only when the match data matches the state of the first of the two bits.