Electronic ballast for fluorescent lamps

Details Electronic ballast for fluorescent lamps Electronic ballast for fluorescent lamps

H - Electricity

05

B

H05B 41/14 (2006.01) H05B 41/16 (2006.01) H05B 41/28 (2006.01)

Patent

CA 2178120

A transformerless ballast for a gaseous discharge lamp is disclosed. The ballast comprises: a rectifier; a filter for the rectifier output; a voltage divider for the filter output; an electronic gate modulating the filter output to power a lamp when the lamp is lit; a controller controlling the electronic gate responsive to variations in load current and lamp impedance and to variations in the voltage divider output; an oscillator generating an output for predetermined period of time until after the lamp is lit; and an amplifier receiving and amplifying the oscillator output for powering the lamp when the lamp is unlit.

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