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:
Sep. 08, 1992
Filed:
Jul. 26, 1991
Applicant:
Inventors:
Tae-Jin Kim, Seoul, KR;
Kyu-Chan Lee, Ansan, KR;
Assignee:
Samsung Electronics Co., Ltd., Suweon, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
3072962 ; 3072961 ; 3072968 ; 36518909 ;
Abstract
A semiconductor memory device having a substrate voltage production circuit comprises a time delay circuit. The time delay circuit of the present invention has a simple construction and is provided to facilitate removal of an unwanted substrate current I.sub.SUB existing during a precharge cycle of memory operation. The substrate voltage production circuit requires no additional regulating signals for operation. Latch-up conditions commonly caused by such unwanted substrate currents are eliminated and stable semiconductor memory device operation is achieved.