Circuit for supplying voltage to a microprocessor in an ignition circuit for an internal combustion engine

Abstract

The invention is directed to a circuit for providing a controlled voltage supply to a microprocessor in an ignition circuit of an internal combustion engine equipped with a spark plug. The circuit includes: a generator having an induction coil and magnetic device for generating an alternating voltage in the coil; a microprocessor for controlling the spark plug; the microprocessor having first and second connecting terminals and a capacitor connected across the terminals; a thyristor having a gate electrode is connected between the induction coil and the capacitor; and, a voltage limiter is connected to the gate electrode, The controlled voltage supply for the thyristor is ensured over the entire rpm range of the engine without noticeable energy losses.

Dependencies are inferred from the claim text.