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:
Aug. 06, 1991
Filed:
Jul. 14, 1989
Motorola, Inc., Schaumburg, IL (US);
Abstract
A protected Darlington transistor arrangement comprising: first (2) and second (4) bipolar transistors each having a base, a collector and an emitter, the base of the first transistor being coupled to the base (B) of the Darlington transistor, the collectors of the first and second transistors being coupled to the collector (C) of the Darlington transistor, the emitter of the first transistor being coupled to the base of the second transistor, and the emitter of the second transistor being coupled to the emitter (E) of the Darlington transistor; and a third bipolar transistor (6) having a base, a collector coupled to the collector of the Darlington transistor, and an emitter, wherein the Darlington transistor arrangement further comprises: a Zener diode (8) coupled between the collector of the Darlington transistor and the base of the third transistor, the base of the third transistor being coupled to the emitter of the second transistor, and the emitter of the third transistor being coupled to the base of the second transistor.