Koninklijke Philips Corporation N.v.

Antonius Henricus Peterus Johannes Habraken

Wilhelmus Hinderikus Maria Langeslag

Arnold Willem Buij

Geert Willem Van Der Veen

Machiel Antonius Martinus Hendrix

Everaard Marie Jozef Aendekerk

An electronic ballast for supplying a lamp comprises a control loop for controlling the rms value of an operational parameter so as to be constant. In the control loop, the actual rms value of the parameter is generated as a linear combination of its average value and its peak value.

Circuit arrangement for feeding a load

In a circuit arrangement for operating at least two discharge lamps and comprising an equalizer transformer, removal or extinguishing of one of the lamps is detected by monitoring the voltage over the equalizer transformer and switching off the circuit arrangement in case the voltage over the equalizer transformer is higher than a reference voltage.

Multiple discharge lamp ballast with equalizer voltage protection

In an inverter for operating a discharge lamp by means of an AC current comprising two switching elements, the effect of hard switching is counteracted by means of a snubber comprising two inductive elements and at least two diodes.

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Eindhoven, Netherlands

Antonius Henricus Peterus Johannes Habraken