Electric lamp and discharge devices: systems – Current and/or voltage regulation
Patent
1981-02-17
1983-06-14
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Current and/or voltage regulation
315224, 315276, 315DIG4, 323301, 323353, 331177R, G05F 100
Patent
active
043885667
ABSTRACT:
A passive control network for connection between a pair of load output level setting terminals, as on a ballast for a dimmable fluorescent lamp in a lighting system, to provide a required variable impedance, where the magnitude of the impedance establishes the load output level. The passive control network includes an isolation transformer for coupling a periodic waveform at the load input terminals to the variable impedance component, the magnitude of which impedance is reflected through the transformer to provide the load level-setting impedance.
REFERENCES:
patent: 3249892 (1966-05-01), Van Geen
patent: 3419753 (1968-12-01), Schultz et al.
patent: 3619713 (1971-11-01), Biega et al.
patent: 4057751 (1977-11-01), Bonsignore et al.
Bedard James F.
Chen De-Yu
Eichelberger Charles W.
Bernkopf Walter C.
General Electric Company
LaRoche Eugene R.
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