| 摘要 |
PURPOSE:To make it possible to obtain stabilized voltage without spoling the surge resistance to load, by connecting a capacitor in series to the input electric power source, and controlling so that the sum of the input voltage and the charging voltage of this capacitor can be kept constant. CONSTITUTION:When voltage of the input electric power source E1 is applied between the input terminals 1-1', the transistor TR3 becomes on, and a current flows into the winding 41 of the transformer 4. An electromotive force is generated in other windings 42-44 of the transformer 4, but since it is a reverse bias to diodes 9, 10 of the windings 43, 44, no current flows. On the other hand, when voltage of a current flowing in the resistance 7 has dropped, the Tr8 turns on and the TR3 turns off. When the Tr3 turns off, an electromotive force is generated in each winding in the opposite direction against the previous direction, the diode 9 turns on, and the capacitor 13 is charged to the polarity as shown in the figure. At this stage, when the charging voltage of the capacitor 13 becomes the prescribed voltage, the TR14 turns on, and the sum of voltage of the electric power source E1 and voltage of the capacitor 13 is kept constant. Accordingly, the output voltage which can be obtained between the output terminals 2-2' becomes stabilized voltage which does not depend on the input voltage. |
