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:
Jun. 03, 2003
Filed:
Jun. 21, 2002
Junichi Suyama, Tokyo, JP;
Wataru Nagai, Tokyo, JP;
Akihiro Hirota, Tokyo, JP;
Shota Ohtsubo, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A low power consumption type dynamic random access memory (DRAM) operable with reduced current consumption responsive to an external signal, without causing occurrence of malfunction during low current consumption. An input circuit for receiving signals, a memory array for holding data, and a peripheral circuit for controlling the memory array are driven by an internal voltage supplied by two groups of internal voltage receiving circuits, while an output circuit for outputting signals is driven by an external power supply. The two groups of internal voltage receiving circuits are deactivated in response to an externally provided power supply control signal, and the output circuit is controlled so as to be in a high impedance condition with voltage of the external power supply being applied thereto.