[sdiy] Good 24db/oct HP-LP-BP-Notch filter Schematics ??

[Florian Anwander]

Hello Tom


On 05.03.14 19:23 , Tom Wiltshire wrote:
> I can't see a simple way (that is to say: actually likely) that they've built this. It's starting to bug me!

and it becomes more bugging if you look at the pictures at 
schneidersladen.de:

http://www.schneidersladen.de/en/analogue-systems-rs-110.html

click on "more views" and you start to wonder, which ICs should make this...



Florian