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. 22, 1991
Filed:
Nov. 30, 1989
Karl J Huehne, Austin, TX (US);
Motorola Inc., Schaumburg, IL (US);
Abstract
A circuit which provides a threshold voltage to a single-ended operated diode load emitter coupled logic circuit includes a transistor having an emitter coupled to an output at which the threshold voltage is produced, a collector coupled to a positive supply conductor and a diode coupled between the positive supply conductor and the base of the transistor. A current source is coupled to the emitter of the transistor which sinks a current that is equal to the 'tail' current of the logic circuit. The magnitude of the threshold voltage produced is equal to a value that lies midway between the logic output voltage swing developed across the diode loads of the logic circuit.