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how to design a very low pass op only with 10pF cap

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wangkes9

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I want to design a operation amplifier with differential input ,single output.
And the gain is about 150 or higher at DC.But I want the AC gain is as small as possible.

How can I realize it. If using a common differential circuits with a Cap at output. The problem is , I can not offer large Capacitor in IC ( only 10pF) ,so the bandwidth is too high. Maybe I can increase the Cap value using Miller theory , but the cap is still too small.

How can I do .Thanks a lot
 

Maybe reduce the current consummation and MOS size.
 

Does this decrease its DC gain. I hope DC gain as large as possible,
and AC gain as small as possible.

I will try it . Thank you
 

Only 10"pF" in IC? That's no true. Why are you limited to that?
 

Because this is only a compensation circuit in a multichannel(>100) circuit.

So the cap can't be too large. Or else the chip will be very large
 

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