Lamp ballast circuit

Details Lamp ballast circuit Lamp ballast circuit

1977-08-19

1978-11-28

Smith, Alfred E.

Electric lamp and discharge devices: systems

Periodic switch in the supply circuit

Plural load device systems

315205, 315209R, 315224, 315DIG4, 315DIG5, 315DIG7, 315255, 363 37, 363101, H05B 4136, H02M 5458

Patent

active

041277953

ABSTRACT:
A highly efficient tuned oscillator ballast circuit especially suitable for a fluorescent lamp load includes an oscillator circuit coupled to a pulsed DC potential source and having a tuned output circuit coupled to a load circuit, to a drive circuit for the oscillator which is dependent upon current flow in the load circuit and to a rectifier and charge storage and isolation and applying network coupled to the pulsed DC potential source and providing energy thereto whenever the potential decreases below a given reference level. A transient compensating circuit to protect the oscillator components from initial or "start up" transients is also included.

REFERENCES:
patent: 3008068 (1961-11-01), Wilting et al.
patent: 3611021 (1971-10-01), Wallace
patent: 3723848 (1973-03-01), Miller
patent: 3754160 (1973-08-01), Jensen
patent: 3758841 (1973-09-01), Bourbeau
patent: 3889153 (1975-06-01), Pierce
patent: 4045711 (1977-08-01), Pitel
patent: 4075476 (1978-02-01), Pitel

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