Electric lamp and discharge devices: systems – Pulsating or a.c. supply – Plural load device systems
Patent
1995-09-08
1996-05-14
Pascal, Robert
Electric lamp and discharge devices: systems
Pulsating or a.c. supply
Plural load device systems
315200R, 315209T, 315209SC, 315306, 315310, 315DIG5, H05B 4116
Patent
active
055170870
ABSTRACT:
A fluorescent lamp ignition circuit of the type including a DC voltage stabilizer to process input voltage into a constant voltage by dropping or boosting, an inductance filter to receive output power supply from the DC voltage stabilizer and to remove surge from it, an oscillator having a transformer, which receives output power supply from the inductance filter and then provides a sin-wave output for igniting a fluorescent lamp, and a feedback circuit connected between the oscillator and the fluorescent lamp to provide a feedback signal to the DC voltage stabilizer, wherein the feedback circuit includes two shunt resistors, which connect the mid-point of the secondary side of the transformer of the oscillator to earth, and two diodes respectively connected between the shunt resistors and the DC voltage stabilizer to form a double-feedback loop.
REFERENCES:
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patent: 4723098 (1988-02-01), Grubbs
patent: 4933605 (1990-06-01), Quazi et al.
patent: 5142202 (1992-08-01), Sun et al.
patent: 5173643 (1992-12-01), Sullivan et al.
Jetta Computer Co., Ltd.
Pascal Robert
Philogene Haissa
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