Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
H05B39/04—Controlling
H05B39/08—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices
H05B39/083—Controlling by shifting phase of trigger voltage applied to gas-filled controlling tubes also in controlled semiconductor devices by the variation-rate of light intensity