Gain controlled electronic ballast system

Details Gain controlled electronic ballast system Gain controlled electronic ballast system

H - Electricity

05

B

315/40, 355/44

H05B 41/00 (2006.01) H05B 41/29 (1985.01)

Patent

CA 1245367

GAIN CONTROLLED ELECTRONIC BALLAST SYSTEM ABSTRACT In one form of the invention, a gain controlled elec- tronic ballast system (100) is provided having a power source (112) for actuating a pair of gas discharge tubes (140 and 140'). The ballast system (100) includes a filter network (111) which is connected to the power source (112) for establishing a substantially constant voltage signal and suppressing harmonic frequencies generated by the electronic ballast system 100. An induction circuit (115) is coupled to the filter network (111) for generating a voltage across the gas discharge tube (140 and 140') responsive to the driving current. The induction circuit (115) includes an automatic gain control network (117) to maintain the driving current at a predetermined value and generates a switching signal. A switching circuit (113) is coupled to the induction circuit (115) for es- tablishing the driving current at a substantially constant and predetermined frequency responsive to the switching signal.

497738

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