| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To convert a plurality of analog signals to digital signals by a single analog-to-digital converting means. <P>SOLUTION: An input voltage of a switching regulator 12 and voltages formed on both ends of an LED 1 are captured into switches SW 100 to SW 102 of a multiplexer 16 respectively, the captured voltages are selected in the sequential order and are outputted from the multiplexer 16 to an A/D converter terminal 30 of a microcomputer 18, and the inputted voltages are converted to digital signals using the A/D converter built in the microcomputer 18, while switching signals for ON/OFF operating the switch SW 1 are formed based on the converted digital signals, then ON/OFF operation of the SW 1 is controlled in accordance with the formed switching signals. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
