共模信号

1
common mode signal
... common mode rejection ratio(CMRR),共模抑制比 common mode signal,共模信号 common mode voltage,共模电压 ...

1
这种类型的干扰一并来到两个差分输入端，因而出现一个共模信号。
This type of interference is induced equally into both differential inputs, and therefore appears as a common-mode signal.
2
为了提高前置级的共模抑制能力，采用了共模信号的抑制电路—右腿驱动和浮地跟踪。
The design adopts the circuit for constraining the in-phase signal, in order to improve the system's CMRR.
3
电路见图5，这种电路在运算电路中相当有用，比如差分对单端的转换，抑制共模信号。
This circuit is shown in Figure 5 and is useful as a computational amplifier, in making a differential to single-ended conversion or in rejecting a common mode signal.

共模信号
共模信号是作用在差分放大器或仪表放大器同相、反相输入端的相同信号。以局部共通端或者接地为参考，共模信号就在双线电缆的两根线上出现，幅度和相位都相同。很明显，当双线中的一根接到地时共模信号就不会出现。技术上共模电压是平衡电路各导体对地电压的向量和的一半，这种信号可由下面一个或者多个因素引起。

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