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:
May. 25, 1999
Filed:
Apr. 07, 1997
Applicant:
Inventor:
Sukalpa Biswas, Sunnyvale, CA (US);
Assignee:
Opti, Inc., , US;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F / ;
U.S. Cl.
CPC ...
711106 ; 365222 ;
Abstract
A computer system refreshes dynamic memory in a burst, but allows other memory access requests to preempt a burst refresh before the burst completes. In another aspect, once a burst refresh begins, it is allowed to continue for a number of refresh cycles which is greater than the number of refresh cycles then due; that is, until a time when the number of refresh cycles due is negative. This technique, referred to herein as 'refresh-ahead', effectively helps to shift memory refresh activity into periods of bus time which would otherwise be idle.