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:
Oct. 20, 1992
Filed:
May. 22, 1990
Michael J Barry, Colorado Springs, CO (US);
United Technologies Corporation, Hartford, CT (US);
Abstract
A memory cell employs four interconnected modules, each having two inputs and a truth table that has a logic level for input states and provides for a high impedance output state for unallowed states which differ from an allowed state by the status of one input. The interconnection is such that each module of a pair has as inputs the outputs of both members of the other pair, so that if one module changes state, the inputs to the members of the other will be in one of the unallowed states that produces a high impedance output. Thus, a radiation induced change of state in one module will not propagate through the system, but will be restored to an allowed state by action of the unaffected modules.