| 摘要 |
PURPOSE: To enable reduction of the size of a circuit due to sharing constitution of a variable resistor means, and enable detecting voltages of a plurality of power sources. CONSTITUTION: A source voltage detection circuit having a variable resistor control means and a detected voltage selection means is constituted of a variable resistor control means 11, the same number of detection voltage selection means 121 to 123 as the source voltages and the same number of waveform shaping means 131 to 133 as the source voltages to detect at least two source voltages. The source voltage detection circuit is characterized by that the output terminal of the variable resistor means 11 and respective output terminals of the detection voltage selection means 121 to 123 are connected with respective input terminals of the waveform shaping means 131 to 133. |
