Low pressure mercury discharge lamp circuit arrangement

Details Low pressure mercury discharge lamp circuit arrangement Low pressure mercury discharge lamp circuit arrangement

1991-01-09

1992-11-24

LaRoche, Eugene R.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Impedance or current regulator in the supply circuit

315287, 315307, 315209R, H05B 4136

Patent

active

051665808

ABSTRACT:
A circuit arrangement suitable for operating a low pressure mercury discharge lamp by means of a high-frequency pulsatory current comprising circuitry for generating a high-frequency pulsatory current from a supply voltage with a modulator for modulating the high-frequency pulsatory current into a substantially square-wave shaped voltage with an amplitude A, a modulation frequency f and a duty cycle DC together with circuitry for adjusting the modulation frequency f and circuitry for adjusting the duty cycle DC.

REFERENCES:
patent: 4156166 (1979-05-01), Shapiro et al.
patent: 4170747 (1979-10-01), Holmes
patent: 4219760 (1980-08-01), Ferro
patent: 4358716 (1982-11-01), Cordes et al.
patent: 4412154 (1983-10-01), Klein
patent: 4777409 (1988-10-01), Tracy et al.
patent: 4885508 (1989-12-01), Krokaugger
patent: 4937501 (1990-06-01), Ganser et al.
patent: 5003231 (1991-03-01), Perper
patent: 5059869 (1991-10-01), Albach et al.

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