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:
Dec. 25, 1990
Filed:
May. 21, 1990
Dwight D Esgar, Tempe, AZ (US);
Ray D Sundstrom, Chandler, AZ (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A circuit having first and second inputs and first and second outputs includes a differential receiver circuit responsive to the first and second inputs for providing corresponding output logic signals at the first and second outputs. A tri-state detection circuit responsive to the first and second inputs and having an output for providing a first predetermined voltage to the differential receiver circuit when the first and second inputs are in a normal mode and for providing an increased second predetermined voltage to the differential receiver circuit when the first and second inputs are in a tri-state mode wherein oscillation of the differential receiver circuit is prevented and the outputs are forced to known logic states while the noise margin of the differential receiver is increased without a sacrifice in common mode range.