Op amp spec for tunable filter

Discussion in 'General Electronics Chat' started by atferrari, Apr 20, 2011.

  1. atferrari

    Thread Starter AAC Fanatic!

    Jan 6, 2004
    I've run across a design of a tunable state variable filter using AD825 op amps.

    My idea is to replicate the design for a maximum f0 of around 130 KHz.

    What could be a correct (and not costly) replacement of those op amps?

    I was thinking to use dual / quad ones but I do not know what actual specs to look for. Sure slew rate, low noise. Something else?

    As per what I read GBW product has to be 10, 50 or 100 times the highest f0? How much should it actually be?