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. 02, 2003
Filed:
Mar. 01, 2002
Applicant:
Inventors:
Wilhelm Melchert, Hennef, DE;
Gerd Schmitz, Troisdorf, DE;
Assignee:
Moeller GmbH, Bonn, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02H 9/00 ;
U.S. Cl.
CPC ...
H02H 9/00 ;
Abstract
A circuit arrangement for overvoltage protection of a power transistor for controlling an inductive load includes a first varistor which bridges-over the supply connections. A second varistor is arranged parallel in relation to the switching path of the power transistor and in series with a switching transistor. The switching transistor can be controlled by a voltage divider which is connected to the supply voltage via a Zener diode.