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:
Jan. 21, 2014
Filed:
Aug. 08, 2011
Applicants:
Ken Takeuchi, Tokyo, JP;
Mayumi Fukuda, Tokyo, JP;
Inventors:
Ken Takeuchi, Tokyo, JP;
Mayumi Fukuda, Tokyo, JP;
Assignee:
The University of Tokyo, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 29/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
When write data D is high rewritten data, a PCcontrols a DRAMto store the write data D (steps Sand S). When the write data D is not the high rewritten data, the PCoutputs an RRAM write request signal and the write data D to an SSD (step Sand S). A memory controller of the SSD input the RRAM write request signal controls the RRAM and an SRAM to store the write data D in the RRAM or the SRAM. This treatment enables data stored in the DRAM to be rewritten frequently. Therefore, the decrease of number of times of refresh operation of the DRAM and the decrease of power consumption are accomplished.