Pls give me some ideas about filter design

[longstar]

If I am going to design a active filter,then how to select the OPA?The opa must have high gain and high GBW,but I don't know the requirement of -3db frequency about the opa.Could you give me some idea?thanks.

Rgds.
longstar

 

[mists]

in general, the opa should have the bandwidth about 10X-3db filter frequency

 

[imad694]

what kind of filter are you designing? which response type?

 

[roykyn]

try matlab or electronic workbench(multisim) the best...it contains all the electronic components.....u can simulate ur filter easily.....