H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 37/00 (2006.01) H05B 39/00 (2006.01)
Patent
CA 2528740
A method of converting a line voltage to an RMS load voltage in a lamp includes performing phase-control clipping of a load voltage with a phase-control clipping circuit that provides an RMS load voltage to the lamp. Conduction in the phase-control clipping circuit is triggered independently of a line voltage magnitude with a time- based pulse source that defines a conduction angle of the phase-control clipping circuit. The phase-control clipping circuit includes a transistor switch whose gate receives positive polarity signals from the time-based pulse source to trigger conduction of the phase- control clipping circuit.
Ballenger Matthew B.
Weyhrauch Ernest C.
Fetherstonhaugh & Co.
Osram Sylvania Inc.
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