Electric lamp and discharge devices: systems – Current and/or voltage regulation – Automatic regulation
Patent
1994-01-31
1996-12-10
Pascal, Robert
Electric lamp and discharge devices: systems
Current and/or voltage regulation
Automatic regulation
315308, 315209, 315226, 315DIG7, 315244, G05F 100
Patent
active
055834027
ABSTRACT:
The present invention provides a method and circuit for controlling the flow of current through a load. In a preferred embodiment, an oscillator generates a pulse signal of constant frequency. A pulse width modulator adjusts the duty cycle of the pulse signal in response to a dimming level signal input indicative of the desired level of current flow through the load. A converter receives the pulse signal as an input and converts it into an AC signal, the frequency of which follows the frequency of the pulse signal and the symmetry of which varies with the duty cycle of the pulse signal. The load is connected into a resonant circuit tuned such that a change in the symmetry of the AC signal changes the level of current flowing through the load.
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Hesterman Bryce L.
Marques Antonio
Moisin Mihail S.
Nostwick Allan A.
MagneTek, Inc.
Pascal Robert
Philogene Haissa
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