| 摘要 |
PURPOSE:To facilitate making the device small-sized and make it difficult to be affected by the load state to prevent the generation of a waveform distortion, by giving the switching function in a prescribed frequency and the output stabilizing function to one power system. CONSTITUTION:The square wave output having a prescribed frequency generated in an oscillating part 1 is inputted to the base of a driving transistor TR21 to switch it. A comparator 25 applies the differential signal voltage between the AC output detection signal from an output detecting part 5 and a reference voltage Vref to the collector of the TR21 through a resistance 23 to control the emitter current of the TR21. Consequently, the TR21 drives a TR3 with the frequency of the oscillating part 1 and the current of the comparing part 25, and the TR3 switches the current, which has the frequency of the oscillating part 1 and is controlled, for a primary winding 41 of an output transformer to generate a stabilized AC output in a secondary winding 42. |
