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:
Jan. 03, 1978
Filed:
Aug. 06, 1976
Ichiro Ohhinata, Yokohama, JA;
Hitachi, Ltd., , JA;
Abstract
A memory circuit is comprised of a memory cell of PNPN- equivalent 4-layer construction, a selective input circuit composed of a pair of an NPN transistor and a PNP transistor, and a read-out circuit for reading the information stored in the memory cell. The emitters of the transistors included in the selective input circuit are connected to one of the selective input terminals, the bases thereof to the other selective input terminal, the collector of one of the transistors to the write input terminal of the memory cell, and the collector of the other transistor to the input terminal of the read-out circuit. Thus, both the writing and reading operations are controlled from the same selective input terminal, and power consumption of the selective input circuit in the holding mode is substantially zero.