Patent ID: 6107748
Filing Date: 2000-08-22
Classification: F02P

Abstract:
A circuit arrangement of an ignition output stage, comprising:a switching arrangement which switches between an ON state and an OFF state to selectively switch a particular current through a primary winding of an ignition coil between an ON state and an OFF state;a trigger circuit cooperating with the switching arrangement and causing a two-stage activation of the particular current through the primary winding of the ignition coil; anda switchable high-resistance parallel branch arrangement bridging the switching arrangement and carrying a limited current,wherein, at an energizing time which is determined independently from the trigger circuit, the trigger circuit blocks the switching arrangement from receiving the particular current which flows through the primary winding,wherein, at the energizing time, the switchable high-resistance parallel branch arrangement is switched on, andwherein, at a predetermined changeover time which occurs after the energizing time, the trigger circuit removes a block of the switching arrangement to receive the particular current.