Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Silicon controlled rectifier ignition
Patent
1988-08-11
1990-03-27
Mis, David
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Silicon controlled rectifier ignition
315209T, 123644, H05B 3700
Patent
active
049123734
ABSTRACT:
A bipolar power switch (4) in series with the primary of an ignition coil (2) and a detection resistor (R1) associated with a voltage divider (R2, R3) supplying a voltage V.sub.D ; a controlled amplifier-comparator (9), the first input of which receives the measured voltage and the second input receives a reference voltage (8), and the output of which is connected with the base of the switch (4), this amplifier-comparator acting for limiting the base current when the measured voltage is approaching the reference voltage; a series resistor (R10) between the output of the amplifier-comparator (9) and the base of the switch (4); and a differential amplifier (11), the inputs of which are connected with the terminals of the series resistor and the output of which is connected with the first input of the amplifier-comparator.
REFERENCES:
patent: 3838672 (1974-10-01), Richards et al.
patent: 4246881 (1981-01-01), Bodig
patent: 4248200 (1981-02-01), Sugiura et al.
patent: 4574221 (1986-03-01), Hess et al.
Mis David
SGS-Thomson Microelectronics S.A.
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