why is there no folded cascode op amp composed of bipolar ?!

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chmhero

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i found there was no folded cascode op amp completely composed of bipolar ?!

why?

i have only seen folded cascode op amp completely composed of cmos ,or composed of cmos and bipolar,

but i have never seen completely constructed by bipolar.

thanks
 

Re: why is there no folded cascode op amp composed of bipola

Probably you haven't look hard enough. I have seen and I have designed bipolar folded cascode structures. I don't see why they shouldn't be done in bipolar.
 

Re: why is there no folded cascode op amp composed of bipola

I think you can find your answer in this document.
 

cascode is a structure,it can be used bipolar.but cmos is used widely.
 

where can find low voltage CMOS cascode OPA?
 

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