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Design >> Analog Design >> what is the role of the cap in this comparator?
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Message started by xwj623 on Aug 21^st, 2009, 3:11am

Title: what is the role of the cap in this comparator?
Post by xwj623 on Aug 21^st, 2009, 3:11am

the two cap in the red circle showed in the fig.

thanks.

Title: Re: what is the role of the cap in this comparator?
Post by Berti on Aug 21^st, 2009, 6:24am

I think that this caps should cancel the cgs of the top PMOS transistors (they contribute negatively since they are cross-connected). Some people also do that to reduce the cgs of input-pairs.

Regards