| 摘要 |
PURPOSE:To enable to supply a stable voltage to a load with respect to the variation in an input power source of wide range by altering the base current supply value of a switch element by the amplitude of an input voltage. CONSTITUTION:A Zener diode 12 and a transistor 13 are connected in series with a feedback winding 3c of a transformer 3. A feedback resistor is divided into two resistors 5a, 5b, and a resistor 14 and a transistor 13 are connected between the connecting point and an earth. The voltage generated at the feedback winding 3c of the transformer 3 is varied in response to the variation in the input power source 1, the transistor 13 is controlled ON or OFF, thereby stabilizing the output voltage under the control of the current supplied to the base of the transistor 2. |
