Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Periodic switch in the primary circuit of the supply...
Patent
1980-12-19
1982-10-05
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Periodic switch in the supply circuit
Periodic switch in the primary circuit of the supply...
315105, 315277, 315278, 315DIG7, H05B 4129
Patent
active
043530109
ABSTRACT:
An improved drive scheme for a pair of push-pull inverter transistors in an electronic ballast circuit. The inverter output is coupled through a series resonant circuit comprising a capacitor and the primary winding of an output transformer. The resonant circuit is coupled to the inverter output through an additional winding on the primary of an interstage so that a component of the loop current is fed back to the bases of the push-pull transistors, thereby compensating for phase errors in the drive signal applied at the inverter input.
REFERENCES:
patent: 4075476 (1978-02-01), Pitel
patent: 4188661 (1980-02-01), Bower et al.
Bay David L.
Knoll William C.
GTE Products Corporation
LaRoche Eugene R.
Odozynski John A.
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