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. 26, 1995
Filed:
Mar. 30, 1994
Toshiyuki Sakuta, Plano, TX (US);
Tomohiro Suzuki, Tsukuba, JP;
Hitachi, Ltd., Tokyo, JP;
Texas Instruments, Inc., Dallas, TX (US);
Abstract
A semiconductor memory device capable of a self-refreshing operation with a refresh-initiation signal generated in the memory device has a self-refreshing control circuit. A self-refreshing operation is automatically effected, without externally supplied clock signals, with a specific refreshing cycle having an internally set mode entry time period, a burst refresh time period and an internally set pause time period. These time periods are detected by a single counter circuit arranged to count pulses produced from a basic clock pulse signal generated by an oscillator. The burst refreshing is effected with the pulses contained in a pulse signal generated in synchronization with the basic clock pulse signal from the oscillator.