Patent Number: 6,167,876

Title: Circuit arrangement for an ignition stage, in particular for the ignition circuit of a motor vehicle

Abstract: A circuit arrangement of an ignition output stage, in particular for an ignition circuit of a motor vehicle, is described. The circuit arrangement includes a multiple Darlington transistor (Darlington) which drives a primary winding of an ignition coil, as well as a driving circuit for the Darlington. An n-p-n Darlington is provided, whose collector is connected to the positive terminal of a voltage source and whose emitter is connected to a first terminal of the primary winding of the ignition coil. The second terminal of the primary winding is connected to ground. The Darlington is driven via a decoupling element which isolates the driving circuit from a negative reverse voltage present at the base of the Darlington when the latter is turned off.

Inventors: Uebele; Manfred (Reutlingen, DE), Meinders; Horst (Reutlingen, DE), Qu; Ning (Reutlingen, DE)

Assignee: Robert Bosch GmbH

International Classification: F02P 3/055 (20060101); F02P 3/02 (20060101); F02P 3/04 (20060101); F02P 001/00 ()

Expiration Date: 01/02/2018