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:
Oct. 11, 2005
Filed:
Jul. 15, 2003
Hoki Kim, Hopewell Junction, NY (US);
Toshiaki Kirihata, Poughkeepsie, NY (US);
David R. Hanson, Brewster, NY (US);
Gregory J. Fredeman, Staatsburg, NY (US);
John Golz, Garrison, NY (US);
Hoki Kim, Hopewell Junction, NY (US);
Toshiaki Kirihata, Poughkeepsie, NY (US);
David R. Hanson, Brewster, NY (US);
Gregory J. Fredeman, Staatsburg, NY (US);
John Golz, Garrison, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
In a DRAM, which includes a plurality of memory banks, there is a pair of separate flag bit registers for each bank with the flag bit registers that are shifted up/down respectively. A comparator for each bank provides a comparator output. An arbiter for each bank is connected to receive a flag bit up signal and a flag bit down signal from the flag bit registers for that bank and the comparator output from the comparator for that bank. The arbiters are connected to receive a conflict in signal and to provide a conflict out signal. The pair of flag bit registers represent a refresh status of each bank and designate memory banks or arrays that are ready for a refresh operation.