Instant light lamp control circuit

Details Instant light lamp control circuit Instant light lamp control circuit

H - Electricity

05

B

315/45

H05B 41/24 (2006.01) H05B 35/00 (2006.01)

Patent

CA 1112296

LD 7457 INSTANT LIGHT LAMP CONTROL CIRCUIT ABSTRACT An instant light lamp combining a miniature arc tube and a standby filament in a sealed vitreous envelope is operated by a high frequency power supply combined with a filament control circuit. The power supply comprises transforming means including voltage sensing means having an output proportional to the drop across the arc tube. The control circuit comprises an electronic switch for energizing the filament and a comparator circuit which has an output gating on the switch when the sensing means output is either above a high limit or below a low limit.

314831

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