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:
Nov. 02, 1999
Filed:
Jan. 26, 1998
Horst Flock, Reutlingen, DE;
Stribel GmbH, Frickenhausen, DE;
Abstract
In order to provide a control device for controlling an inductive load connected to an output, comprising a control circuit which generates a pulse duration modulation signal, an FET final stage switch for connecting a supply current for the load, a switch-on stage and a switch-off stage for the switching on and off of a gate voltage of the final stage switch, and a gate voltage supply for the switch-on stage, with which a reliable connection of the FET final stage switch can be achieved with means which are as simple as possible it is suggested that the gate voltage supply have a charge pump circuit, comprising a diode located between a plus connection and a center tap in forward direction and a capacitor located between the center tap and a minus connection, that the center tap be connected to the switch-on stage and that a potential at the minus connection of the charge pump circuit alter in accordance with a potential at the output and thus the capacitor supply at the center tap a gate supply voltage which corresponds at least to a voltage at the connection of the final stage switch on the supply side.