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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 Darlingto

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.

대표청구항 ▼

[ What is claimed is:] [1.] A circuit arrangement of an ignition output stage for a motor vehicle, comprising:an n-p-n Darlington transistor for driving a primary winding of an ignition coil, a collector of the Darlington transistor being coupled to a positive terminal of a voltage source, an emitte

[ What is claimed is:] [1.] A circuit arrangement of an ignition output stage for a motor vehicle, comprising:an n-p-n Darlington transistor for driving a primary winding of an ignition coil, a collector of the Darlington transistor being coupled to a positive terminal of a voltage source, an emitter of the Darlington transistor being coupled to a first terminal of the primary winding of the ignition coil, and a second terminal of the primary winding of the ignition coil being coupled to ground;a lateral p-n-p transistor isolating a driving circuit from the Darlington transistor, a collector of the lateral p-n-p transistor being coupled to a base of the Darlington transistor, an emitter of the lateral p-n-p transistor being coupled to the positive terminal of the voltage source, and a base of the lateral p-n-p transistor being driven by the driving circuit; anda first p-type region in an n-type substrate forming the base of the Darlington transistor and the collector of the p-n-p transistor.