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:
May. 18, 1993
Filed:
Mar. 10, 1992
William D Mensch, Jr, Mesa, AZ (US);
Other;
Abstract
A CMOS integrated circuit microcomputer system includes circuitry for sensing trinary logic states by using a tri-state driver circuit connected to both the input and output of a binary latch having only two states, both of which produce a high output impedance. A first trinary logic level is represented by a first logic level produced and maintained on the conductor by the external device, overpowering the binary latch. A second logic state is represented by a second logic level produced and maintained on the conductor by the external device. A third trinary state is represented by an off condition of the tri-state driver, in which case the binary latch holds whatever state is produced by the microcomputer of the connector.