| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a source voltage adjusting method which can supply a sufficiently voltage even to a board having a much larger voltage drop than any other board by decreasing a threshold in sequence, narrowing down a load voltage value less than a varied threshold, and sending the narrowed-down load voltage value to a power unit. SOLUTION: Voltage comparison parts 113, 116, and 119 compare digitized voltages at respective voltage detection points with a threshold respectively and sends corresponding interruption signals W1, W2, and W3 to a top priority interruption signal determining circuit 121 when the voltages at the voltage detection points are smaller than the threshold. The circuit 121 instructs a selecting circuit 122 to select the voltage signal of a board corresponding to one interruption signal and the selecting circuit 122 sends the indicated signal as a voltage signal V to a power unit 3. The power unit 3 adjusts the output voltage and supplies it to a load 2.</p> |
