Can I make such a circuit?

[walker5678]

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.

 

[kgl_13gr]

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.

 

[erikl]

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?

Sure you can, see this article.
Or G00gle for capacitor multiplication.

 

[walker5678]

The theory is simple, but found it is difficult to realize, especially how to establish the DC operating point of the amplifier.

 

[walker5678]

I found a good structure, see this
File:Cap-mult-op.svg - Wikipedia, the free encyclopedia