| 摘要 |
<p>The device (10) has a resistive voltage divider bridge comprising resistors (R1, R2) mounted at terminals of a power supply unit (20) of an electronic system, and a microcontroller (11) connected to terminals of one of the resistors of the bridge. A galvanic insulation unit i.e. standard optocoupler (U1), is placed between the bridge and the microcontroller. Zener diode (D1) is mounted in series connection with the bridge, and a transistor (T1) is mounted at terminals of the resistor of the bridge. The optocoupler is mounted between the transistor and the microcontroller.</p> |
