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. 25, 2005
Filed:
Apr. 24, 2003
Hyun-suk Lee, Seoul, KR;
Kyung-woo Nam, Seoul, KR;
Hyun-Suk Lee, Seoul, KR;
Kyung-Woo Nam, Seoul, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A refresh operation in a PSRAM device to hidden-refresh an internal memory cell by using a refresh pulse signal may be controlled by forming a dummy duration for the refresh operation in a read/write cycle, reducing the dummy duration when the refresh pulse signal is not generated, and delaying the read/write cycle until the refresh operation is completed, when the refresh pulse signal is generated. The dummy duration may be reduced by a given amount during a period in which the refresh operation is not being performed, while the dummy duration may be increased in period of time subject to the refresh operation.