Electrical transmission or interconnection systems – Personnel safety or limit control features – Interlock
Patent
1981-08-27
1984-01-31
Zazworsky, John
Electrical transmission or interconnection systems
Personnel safety or limit control features
Interlock
307246, 307261, 307268, 123606, 123609, 123619, H03K 501, H03K 5153
Patent
active
044292350
ABSTRACT:
An input stage for an ignition control circuit is provided for producing an output signal from a comparator which switches the primary current circuit of the ignition coil in dependence on a control signal in which the control signal causes alternate switching of two current multipliers, a first charging current determined by a charging resistance and a second charging current determined by the first current multiplier charges a first capacitor, a third charging current derived from the second charging current charges a second capacitor, a first discharge current determined by a discharging resistance and a second discharge current determined by the second current multiplier discharges the first capacitor, a third discharging current derived from the second charging current discharges the second capacitor and a comparator compares the voltage at the second capacitor with a reference voltage to produce an output signal for switching the primary current of the ignition coil.
REFERENCES:
patent: 3937193 (1976-02-01), Kim
patent: 4043302 (1977-08-01), Sessions
patent: 4082075 (1978-04-01), Davis
patent: 4163160 (1979-07-01), Frazee
patent: 4276860 (1981-07-01), Capurka
Telefunken electronic GmbH
Zazworsky John
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