Electronic high frequency controlled device for operating...

Details Electronic high frequency controlled device for operating... Electronic high frequency controlled device for operating...

H - Electricity

05

B

315/54

H05B 41/24 (2006.01) H05B 41/285 (2006.01) H05B 41/392 (2006.01)

Patent

CA 1238945

ABSTRACT A high frequency electronic ballast which comprises a variable frequency oscillator (1) having its frequency controlled by inputs (10 to 15). The oscillator (1) providing complementary outputs (16,17) which controls an inverter (4) via a driver circuit (3). The inverter output is a source for a transformer or choke (5) which directly drives a gas discharge lamp (6). In this way the frequency of operation and hence the illumination of the lamp (6) can be changed by changing the driver (3) frequency by direct control (10 to 15) of the oscillator (1) and the lamp voltage is maintained substantially constant while reducing its current flow.

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