| 摘要 |
A relamping circuit topology to provide a lamping signal in ballast circuits used to power heated filament gas discharge lamps. The relamping circuit includes a low level DC power source, a differential capacitance and a switching device coupled to the differential capacitance. The differential capacitance is configured to produce a relamping signal. The relamping circuit topology also includes an electric current path configured to direct a flow of direct current from the low level DC power supply through a filament of the gas discharge lamp, and to the differential capacitance such that breaking and restoring the electric current path activates the relamping signal. |
