A filament driver is located between a fluorescent lamp and a phase controlled dimmer control. The filament driver comprises a transformer with the primary winding connected to the output of the dimmer control. The secondary winding is connected to the cathode filaments of the lamp and a high pass filter is arranged to pass only the harmonic components of the output voltage from the dimmer control to the filaments.
|IPC||H05B 41/39,H05B 41/16|
|Publication status||Published - 30 Jan 1990|