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:
Dec. 16, 1997
Filed:
May. 25, 1995
Noboru Egawa, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
A semiconductor memory device capable of reducing a delay in the conversion of an input chip enable signal having a TTL level, providing a quick chip enable access and avoiding an increase in current consumption even when the quick chip enable access is made possible. the semiconductor memory device in one embodiment includes an input buffer outputting a signal having a CMOS level in response to a chip enable signal having a TTL level and having a plurality of transistors whose gate widths am set to first dimensions and a second input buffer activated in response to both an input signal having a TTL level other than the chip enable signal and the signal having the CMOS level and having a plurality of transistors whose gate widths are set to second dimensions smaller than the first dimensions. Further, a semiconductor memory device in another embodiment includes an input buffer outputting a signal having a CMOS level in response to a chip enable signal having a TTL level and having a plurality of transistors whose gate widths are set to first dimensions and a second input buffer activated in response to both an input signal having a TTL level other than the chip enable signal and the signal having the CMOS level and having a plurality of transistors whose gate widths are set to second dimensions smaller than the first dimensions.