BREAKERLESS IGNITION SYSTEM

A breakerless ignition system for a spark ignition internal combustion engine is described. The system utilizes an alternating signal having a frequency proportional to the rate at which sparks are to be generated. The alternating signal is applied to the control electrode of a first transistor. The control electrode normally is biased to a point close to conduction. A second transistor has its control electrode connected to one side of a capacitor, the other side of which is connected to the output of the first transistor. A third transistor has its output circuit coupled to the primary of an ignition coil. Means are provided for coupling the output circuit of the second transistor to the control electrode of the third transistor. The circuitry of the third transistor operates at voltage levels determined by the source of electrical energy utilized, such as a storage battery or alternator. The first and second transistors operate at a reduced voltage level determined by a circuit comprising a resistor and a zener diode. Transient protection is provided throughout.