Input stage for automotive ignition control circuit

Details Input stage for automotive ignition control circuit Input stage for automotive ignition control circuit

1978-03-22

1979-07-31

Zazworsky, John

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307228, 307261, 307350, 307358, 307309, H03K 5153

Patent

active

041631609

ABSTRACT:
An input stage for an automotive ignition control circuit receives a signal from a pick-up device and generates in response thereto a control signal for charging and discharging a coil. The pick-up device is typically an open collector switch which controls the direction of flow of a current into or out of the input stage. This current is used to charge and discharge a capacitor in the input stage to produce a triangular waveform signal having a slope proportional to the duty cycle. The triangular waveform signal, together with a reference voltage signal, control a comparator which, in turn, controls the operation of the coil.

REFERENCES:
patent: 4066968 (1978-01-01), Guipaud

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