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:
Nov. 30, 1993
Filed:
Apr. 21, 1992
Hung C Lin, Silver Spring, MD (US);
University of Maryland, College Park, MD (US);
Abstract
A memory cell for multi-valued logic utilizing bidirectional folding V-I characteristics. Two devices with bidirectional multiple folding characteristics, such as the V-I characteristics of resonant tunneling diodes, are connected in series across a power supply. Multiple stable operating points are established where the positive resistance portions the folding characteristics interesect and can be used to store multiple levels of signal. With bidirectional folding characteristics, the number of operating points can be doubled by using both a positive power supply and a negative power supply. The signal can be written in and read out at the connecting point of the two devices.