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. 16, 2002
Filed:
Jun. 12, 1997
Applicant:
Inventors:
Oliver Kiehl, Charlotte, VT (US);
Richard M. Parent, Shelburne, VT (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 8/00 ;
U.S. Cl.
CPC ...
G11C 8/00 ;
Abstract
Dynamic random access memory chips (DRAMs) in a computer memory system are made to be more available for access by a processor even though an autorefresh cycle may be in progress when the processor attempts to access the memory system. A DECODED AUTOREFRESH mode is defined which allows refresh of certain banks of the DRAM only. The bank addresses from the external DRAM controller select the bank where the AUTOREFRESH has to be performed. The DRAM controller circuitry makes sure that every bank of the DRAM gets a refresh command often enough to retain information.