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. 07, 1994
Filed:
Dec. 02, 1992
Jei-Hwan You, Suwon, KR;
Samsung Electronics Co., Ltd., Kyungku-Do, KR;
Abstract
A semiconductor memory device with data retention function to retain data is provided with a sense amplifier control signal generating circuit comprising a switching circuit controlled by a data retention mode detection signal so as to make the time interval between enabling of a word line and starting of an N- or P-type sense amplifier longer in data retention mode than in normal mode. Thus the inventive circuit generates a sense amplifier control signal whose delay time differs in the normal and data retention modes, so that the data retention mode is performed without influencing the operational speed, the charge sharing is sufficiently achieved in the data retention mode, and the direct current flowing is prevented.