| 摘要 |
PURPOSE:To improve mounting efficiency and simplify a circuit, by a method wherein the title power source is provided with an auxiliary power source, which becomes a reference voltage source, common to a plurality of output circuits, and a reference oscillator, controlling a switching time in respective output circuits and common to respective output circuits. CONSTITUTION:Two sets of output circuits are constituted for an input terminal 11 to output from respective output terminals 12, 13. Respective output circuits are provided with a switching unit 1, a high-frequency transformer unit 2, a rectifying unit 3, a smoothing unit 4, a driving unit 5, a pulse width modulating unit 6, controlling the driving unit 5, an error amplifying unit 7 and the like. An auxiliary voltage source 8 is connected to the input terminal 11 to generate a reference voltage and output it to the error amplifier 7, and a reference oscillator 9 and a polarity converter 10 are provided in the title power source. According to this method, respective output voltages are compared with a reference voltage and respective voltages are sent into a pulse width modulator 6. As a result, the generation of noise in respective output circuits due to a difference between switching times in respective output circuits may be restrained. |
