作者: Piero Malcovati , Jim Devoy , Robert Dieter , Michael H. Freeman , Mitchael C. Freeman
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摘要: An electrical circuit for providing power use in powering electronic devices is described herein. The includes a primary and secondary circuit. receives an alternating current (AC) input signal from source generates intermediate direct (DC) signal. DC generated at first voltage level that less than of the AC delivers output to device. delivered