| 摘要 |
PURPOSE:To suppress the fluctuation of output voltage when load current is suddenly changed, by comparing output voltage generated on a load, with a reference voltage, to generate the output of error voltage and to control DC voltage, and by detecting a variation rate of current and feeding back to a control circuit. CONSTITUTION:Load output voltage EO is divided with a voltage dividing ratio (n) by a voltage divider 3, and the output of the voltage divider 3 is turned into n.EO. In the meantime, the input of the voltage VS of a reference power source 4 to an error amplifier 5 is provided and is compared with voltage n.EO and is amplified. At a steady-state time, by this output, a control circuit 2 is regulated, and the output voltage EO is controlled to set VS=n.EO. When load current IL is suddenly changed in step, then the variation rate of the load current detected by a current transformer 7 is taken out by a differentiating circuit 8, and the variation rate is added to the output value of the error amplifier 5, and the control circuit 2 is regulated. Then, the output voltage EO is controlled to set VS=n.EO. |
