| 摘要 |
PURPOSE:To supply a sufficient base current with a simple circuit configuration by supplying a base current of an output stabilizing control bipolar transistor provided at the secondary side of a converter transformer from the transformer. CONSTITUTION:When two types of more DC outputs are generated at the secondary sides of a converter transformer 4 and at least one of them is stabilized by the pulse width control of a bipolar transistor 11, another secondary winding 8 is further provided at the secondary side of the transformer 4. The base current of the transistor 11 is supplied from the winding 8. Thus, since a sufficient base current can be supplied and another power source is not necessary, the size and the weight of the entirety can be reduced. |
