Circuit arrangement for adjusting the operating voltage of high-

Details Circuit arrangement for adjusting the operating voltage of high- Circuit arrangement for adjusting the operating voltage of high-

1985-05-09

1990-01-02

Griffin, Robert L.

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

315116, 315224, H05B 4136

Patent

active

048915637

ABSTRACT:
A circuit arrangement for adjusting the operating voltage of high-pressure gas discharge lamps to a given nominal value, comprises a controllable current limiter connected in series with the lamp and an adjustment circuit (3) for controlling the latter. The output signal of the adjustment circuit is determined by the difference between a given desired value determining the nominal lamp operating voltage and an actual value dependent upon the instantaneous lamp operating voltage. In parallel with the lamp (1) a heating element (5) is arranged which is in thermal contact with a temperature-dependent electrical element (6), which produces the actual voltage dependent upon the instantaneous lamp operating voltage.

REFERENCES:
patent: 3591828 (1971-07-01), Washimi et al.
patent: 3886405 (1975-05-01), Kubo
patent: 4037148 (1977-07-01), Owens et al.
patent: 4039895 (1977-08-01), Chermin et al.
patent: 4162429 (1979-07-01), Elms et al.
patent: 4253046 (1981-02-01), Gerhard et al.
patent: 4291302 (1981-09-01), King et al.
patent: 4460848 (1984-07-01), Fahnrich
patent: 4475065 (1984-10-01), Bhalla et al.

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