Can I make such a circuit?

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walker5678

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Can i use Miller effect to generate a very big effective capacitor, so that i can use it form a low pass filter with very low cut off frequency? See the attached pic.

thanks.
 

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Yes.
The real cut-off frequency of this integrator is ARC, as you can derive by simple transfer function analysis.
Of course, the price you pay is increase in noise and power consumption.
 

walker5678 said:
Can i use Miller effect to generate a very big effective capacitor, so that i can use it form a low pass filter with very low cut off frequency?
Click to expand...

Sure you can, see this article.
Or G00gle for capacitor multiplication.
 
The theory is simple, but found it is difficult to realize, especially how to establish the DC operating point of the amplifier.
 

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