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:
Apr. 25, 1989
Filed:
Jan. 07, 1988
Dong S Min, Seoul, KR;
Samsung Semiconductor & Telecommunication Co., Ltd., Kyoungsangbuk, KR;
Abstract
A C-MOS address buffer for use in a semiconductor memory device is clocked by an inverted column address strobe signal .phi..sub.CAL of an external column address strobe signal CAS. The signal .phi..sub.CAL is supplied to the drain of a feedback transistor in a schmitt trigger and is reinverted to provide a signal corresponding to the address strobe signal CAS. This signal is coupled to the gate of a transistor which controls the application of a supply voltage to the schmitt trigger circuit. Invalid timing address signals between the address input signal Ai and the clock signal comprising the signal .phi..sub.CAL are thus prevented. Also sufficient address set up time and hold time are guaranteed.