Help select the OP bandwidth of a filter

[crossbow_123]

Hi, all
I want do design a 3db bandwidth of 10MHz 3 order butterworth filter,
what about the OP bandwidth of this design, 10MHz, 20MHz, 30MHz, 40MHz or any others?

thanks

 

[sec]

Re: Filter design help

it's all depend of how much gain you want. I'm not sure of that but I think the bandwidth is when the op amp oscillate, what you don't want

 

[bbbb]

Filter design help

Depends on the type of the filter (active rc or switch-cap) also on the topology of filter.
For active-RC at least 100MHz is needed.( Even higher if low THD is needed).