Any common-mode current (ICM) that may be present flows from the voltmeter input lo to instrument chassis common, through earth ground to voltage source ground.
可能出现的共模电流(ICM)从电压表的输入低端流到仪器的机箱公共端，经过大地再流到电压源的地。
2
Again, consider using AMPLIFIERs that exhibit a smooth input bias current transition throughout the applied inputcommon-modevoltage.
再者，所用的放大器也要考虑在加到输入端的整个共模电压(范围内)输入偏置电流转换保持平滑。
3
This simple structure is proved through the SPICE simulation to have the very high commonmodeinputvoltage excursion and low harmonious distortion.