Electric lamp and discharge devices: systems – Discharge device and/or rectifier in the supply circuit – Plural discharge devices and/or rectifiers in the supply...
Patent
1988-11-23
1991-04-16
LaRoche, Eugene R.
Electric lamp and discharge devices: systems
Discharge device and/or rectifier in the supply circuit
Plural discharge devices and/or rectifiers in the supply...
315DIG7, 315219, 315206, 315DIG5, 315290, 363132, 331113A, H05B 3700, H05B 3904, H05B 4136, H02M 75387
Patent
active
050085964
ABSTRACT:
To provide enhanced starting voltages for fluorescent lamps operating, for xample, from 110 V power networks through a rectifier, and in which a high-frequency oscillatory circuit is used which includes a ring core transformer (TR1, TR2, TR3) operated under saturation conditions, and controlling switching transistors (T1, T2), which have emitter-resistors (R4, R5) connected thereto to stabilize the operation of the circuit and of the transistors, at least one diode (FIG. 4: D4, D5) is connected in parallel to at least one of the emitter resistors; for some circuits (FIGS. 2-4) a diode, or two diodes (D6, D7, D8, D9) can form the emitter-resistors or resistors.
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patent: 4806830 (1989-02-01), Ueki
"Elektronik-Schaltungen", (Electronic Circuits), pp. 147-151, Hirschmann.
Kastl Roland
Roll Ulrich
LaRoche Eugene R.
PATENT TREUHAND GESELLSCHAFT fur elektrische Gluhlampen m.b.H.
Shingleton Michael B.
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