Intuitive understanding that high impedance nodes are difficult to bias

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karsantosh

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Intuitive understanding that high impedance nodes are difficult to bias.
Need for CMFB
 

What do you mean by "difficult"? A high-Z node is real
easy to boss around.
 

crutschow said:
Not enough info to give you an informed answer.
What exactly, are you trying to bias?
Click to expand...
I read somewhere that it is difficult to set the bias point for high impedance nodes and that's why we need CMFB. Would like to understand this intuitively. I understand the concept of 2 fighting current sources, but was wondering if there's more to the bias point of high impedance nodes
 

It’s unclear what you’re saying or trying to do here. For one thing, nobody can help you “intuitively” understand something. That contradicts the whole idea of intuition.
 

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