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. 29, 1991
Filed:
May. 09, 1989
Armin F Wegener, Aachen, DE;
North American Philips Corporation, New York, NY (US);
Abstract
A driver circuit for a high voltage switching power transistor has a first stage connected to the power transistor control terminal for turning the power transistor on and off, and a second stage connected to the power transistor control terminal acting as a current sink for capacitive current due to the transistor capacitances. The second stage is arranged to turn on when the power transistor control terminal voltage falls below a turn-on value and to be turned off when that voltage rises above a turn-on value. A driver circuit for a high voltage half-bridge switching power circuit, having two such power transistors connected in series, has similar upper and lower driver circuits and a level shifting circuit for providing control pulses to the upper driving circuit.