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:
Mar. 15, 1983
Filed:
Feb. 25, 1981
Volker Ludwig, Geretsried, DE;
Juergen Heitmann, Munich, DE;
Siemens Aktiengesellschaft, Berlin & Munich, DE;
Abstract
The invention concerns a method and circuitry for refreshing data stored in a dynamic MOS memory. The refreshing processes proceed independently of data handling in the memory. The duration between successive two refreshing processes is selected such that it is smaller than a predetermined maximum duration by a duration which is associated with a memory process. When during a refreshing process, a reading process is to be executed, the reading process is delayed by means of inserted holding cycles. During execution of memory processes, the execution of a refreshing process is delayed until the memory process is concluded. In the case of a simultaneous appearance of signals which precede a refreshing process and a memory process, a decision unit determines a sequence of execution of the processes.