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:
May. 10, 2005
Filed:
Aug. 18, 2004
Takafumi Takatsuka, Hyogo, JP;
Hirotoshi Sato, Hyogo, JP;
Masaki Tsukude, Hyogo, JP;
Renesas Technology Corp., Tokyo, JP;
Abstract
Activation/inactivation of an internal normal row activation signal for controlling a memory cell selecting operation is controlled in response to leading and trailing edges of an address transition detection signal. When an internal normal row activating signal is activated, generation of an address transition detection signal is masked by mask circuitry. Conflict between an activating operation and an inactivating operation of the normal row activating signal can be prevented and an internal operation can be performed stably. A refresh-control-free dynamic semiconductor memory device having an interface compatible with a static random access memory and capable of stably performing an internal operation is provided.