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. 29, 2002
Filed:
Nov. 14, 2001
Seong-kue Jo, Suwon, KR;
Jong-yul Park, Youngin, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A refresh method for a semiconductor memory device capable of reducing memory cell access time and performing refresh operation is provided. In the refresh method for a semiconductor memory device, when refresh operation is requested, the low address for the refresh operation is latched, and it is determined whether a normal operation command is inputted into the semiconductor memory device. If the normal operation command is inputted into the device, block selection bits of a low address for normal operation is compared with block selection bits of the latched low address for the refresh operation. When block selection bits of both low addresses are the same, a word line for the refresh operation is activated by decoding the latched low address for the refresh operation. A word line for the normal operation is activated by simultaneously decoding the low address for the normal operation while the latched low address for refresh operation is decoded. That is, the normal operation and the refresh operation are simultaneously performed.