Three-level interface control circuit for electronically ballast

Details Three-level interface control circuit for electronically ballast Three-level interface control circuit for electronically ballast

1981-03-11

1983-05-10

La Roche, Eugene

Electric lamp and discharge devices: systems

Current and/or voltage regulation

315 52, 315 58, 315200R, 315DIG4, 307 31, 323354, H05B 3702, H05B 4136

Patent

active

043832040

ABSTRACT:
An interface control circuit for use with a standard three-way, four-switch-position lamp socket to allow a fluorescent lamp-electronic ballast combination to be controlled to provide a selected one of four light output levels, utilizes a three-input, full-wave bridge rectifier to provide ballast/lamp operating potential and gating elements and associated level-setting circuitry to provide at least one D.C. voltage output having an amplitude dependent upon the set position of the socket switch and utilized to control the ballast to set the light output of the associated lamp to a selected one of three different levels when the ballast/lamp combination is energized.

REFERENCES:
patent: 4178535 (1979-12-01), Miller
patent: 4346332 (1982-08-01), Walden

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