[sdiy] Burr Brown UAF42 Universal Active Filter?

[Scott Stites]

Hi gang,

I was perusing TI's site and stumbled across this chip.  I know state variable filters are fairly easy, but this chip has integral 1000 pf caps that are trimmed to +/-0.5% (dang!! - that's MOTM territory =0).  Looks to me that you could slap a couple of VTL5C3's (or your favorite variable resistor of choice), a control circuit on it, and possibly a resonance loop, stick a fork in it, and it's done.......or am I missing something?

Has anyone tried this chip?

http://focus.ti.com/lit/ds/symlink/uaf42.pdf

Cheers,
Scott
 


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