How the Capicitor effect the poles of op-amp

tandr · 发表于 2006-6-8 23:10:32

马上注册，结交更多好友，享用更多功能，让你轻松玩转社区。

您需要登录才可以下载或查看，没有账号？注册

x

Hi every one :
I saw that many op-amp's input stage have a capicitor connected between
one of the differential output and VDD (see the below graph.) Besides this
capicitor , there are other Miller capicitors in the op-amp ,for example capicitor
connected between the output and the other differential output of the input
stage .
If there is not the capicitor in the input stage connected between VDD and
one of the output of the first stage , the poles in the op-amp can be calculated
easily by Miller theory. But I don't know how the capicitor in the graph below
effect the other poles and how to calculate the pole of this capicitor .
Is there some one can help me .