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. 27, 1981
Filed:
Jun. 15, 1979
Lionel S White, Jr, Houston, TX (US);
Ngai H Hong, Houston, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A semiconductor memory device forming a static type memory cell uses three field effect transistors. One is connected between a storage node and a bit line so it functions as an access transistor. The storage node is connected to a refresh node through a second transistor having its gate shorted to drain, and the third transistor connects the refresh node to a supply voltage. A voltage dependent capacitor connects the refresh node to a refresh clock. A logic 1 on the storage node turns on the third transistor and charges the refresh node, which turns on the capacitor so the refresh clock is coupled through to turn on the second transistor and refresh the storage node. When a logic 0 is stored, this will not happen.