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:
Jan. 18, 1983
Filed:
Sep. 30, 1980
Pietro Menniti, Catanzaro, IT;
Maurizio Felici, Milan, IT;
SGS-ATES Componenti Elettronici S.p.A., Milan, IT;
Abstract
A control circuit provides current to the bases of two transistors connected in a Darlington configuration. A load in series with the Darlington collector receives the turn-on current given the improved current gain of this configuration. A diode connected between the Darlington input transistors base and collector begins conduction as soon as the input transistor is saturated. The current applied directly to the base of the Darlington output transistor is enough to saturate the latter at the operating output load current. The invention permits the use of a Darlington switch, and allows the additional advantage of the low saturation voltage of a single transistor.