Inverter having frequency changing function

Details Inverter having frequency changing function Inverter having frequency changing function

1993-06-30

1995-09-26

Lee, Benny

Electric lamp and discharge devices: systems

Pulsating or a.c. supply

Induction-type discharge device load

315307, 315311, 315DIG2, H05B 4116

Patent

active

054536677

ABSTRACT:
This invention suppresses the occurrence of interference in a very short period to prevent device destruction. An inverter circuit of this invention includes a crystal oscillator, which oscillates at a fixed frequency, a load-status detector, which receives a voltage and current to be applied to a load including an inductive or capacitive component and detects the status of the load, a voltage-controlled oscillator, which oscillates at a frequency corresponding to the load status detected by the load-status detector, and a switch, which selects the output of the crystal oscillator or the output of the voltage-controlled oscillator and supplies the selected output to the load. An electrodeless discharge lamp lighting device according to this invention uses an inverter circuit having the above structure.

REFERENCES:
patent: 5063332 (1991-11-01), El-Hamansy

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