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how to calculate the required GBW with  analog filter wizard ?

Question asked by lvchengcai on Sep 28, 2017
Latest reply on Oct 4, 2017 by Matt.Duff

I want to design a passband filter, and the requirement is as follows: the gain is 0dB, The center frequency is 455kHZ, the passband is 60KHZ @-3dBthe stopband is 300kHZ @-40dB, and the analog filter wizard introduce the 6th order Butterworth filter, chose the optimization as low noise, then I got the recommended design shown as figure. I want to know how to calculate Required GBW using the analog filter wizard?

Can you give me the expression that you calculate the Required GBW?