| 摘要 |
PROBLEM TO BE SOLVED: To reduce power consumption as the entire device, especially that under no load, with a power supply along with an electronic component, in which an output voltage is kept constant by controlling oscillation waveform according to a load. SOLUTION: There are provided a transformer (13), a detecting means (16) which detects an output voltage outputted from a secondary coil (L12) side of the transformer (13) and generates a detection signal, transmission means (17 and 101) which transmit the detection signal generated by the detecting means (16) to a primary coil side of the transformer (13), and control means (14 and Q1) that control a voltage applied to the primary coil (L11) side of the transformer (13) based on the output signal of the transmission means (17). The transmission coefficient of detection signal is so set in the transmission means (17 and 101) that the output signal is kept within a signal range required for the control means (14 and Q1) and that the signal range of the detection signal is requisite minimum. COPYRIGHT: (C)2004,JPO
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