| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device capable of supplying a fixed output voltage V0 without being influenced by the variation of input voltage. SOLUTION: In the power supply device consisting of voltage control elements QL Q2, a current limiting resistor R1 and voltage detecting resistors R2, R3, changing input voltage Vin to output voltage V0 and supply the output voltage V0, another stabilized DC voltage V1 is applied to the emitter of the element Q2, which compares the voltage V1 with a voltage obtained by dividing the output voltage V0 by the registers R2, R3 and the output voltage V0 is controlled so as not to be changed.
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