H - Electricity – 01 – K
Patent
H - Electricity
01
K
H01K 1/62 (2006.01) H02M 5/293 (2006.01)
Patent
CA 2538851
A method of converting a line voltage to a desired RMS load voltage in a lamp includes the steps of pulse width modulating a load voltage with a pulse width modulation circuit, triggering conduction in the pulse width modulation circuit independently of a line voltage magnitude with a time-based signal source that defines a duty cycle of the pulse width modulation circuit, and adjusting the RMS load voltage to the desired RMS load voltage by adjusting the triggering of conduction in the pulse width modulation circuit based on a comparison of the RMS load voltage to a reference.
Ballenger Matthew B.
Kendrick George B.
Weyhrauch Ernest C.
Fetherstonhaugh & Co.
Osram Sylvania Inc.
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