| 摘要 |
PROBLEM TO BE SOLVED: To reduce ripples in a negative feedback signal of a stabilized control using a simple circuit configuration. SOLUTION: In a filter circuit 5, a capacitor C3 is connected to its rectified output, a series connection of a resistor R1 and an electrolytic capacitor C2 is similarly connected to the rectified output to split the ripple current of the inverter frequency flowing to the capacitor C2, thereby reducing the ripples. The voltage of both terminals of the capacitor C2 is connected as a main negative feedback signal for stabilizing the output of the control IC 6 for amplifying an error, ad the voltage of both terminals of the capacitor C2 is connected as a local negative feedback signal for stabilizing the output of a control circuit.
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