Analog pin voltage readings seem to depend critically on the voltage of the power supply to the Arduino.
模拟管脚电压读数紧密取决于Arduino的供电电压。
2
Therefore, it is significant for analog circuits to operate at the same low supplyvoltage as digital circuits.
因此，将类比电路操作在与数位电路同样的低电压下更是重要的。
3
Bandgap reference voltages are important analog circuit blocks. It can provide a nearly constant reference voltage which is stabilized over process, power supply and temperature variation.