[sdiy] diode ladder filter design

[harrybissell]

Arrh ????

Steiner-Parker is a Sallen Key filter tuned with diodes as the variable
impedance means... but it is not a ladder filter.
The Korg MS-50 is a similar design using diode "rings" as the variable
impedance means... but also a S-K not a ladder.

The EMS is a "ladder" filter... as is the TB-303 filter.

I'd say to qualify as a ladder filter, the unit has to have two
sets of parallel diodes (or transistors)... with the capacitors
as the horizontal 'rungs'.

note: This is NOT to say that the Steiner-Parker is not a hip filter,
just that it is not a  ladder.

H^) harry

Peter Grenader wrote:

> Steiner-Parker filter.  the Multi-mode diode ladder of all time.
>
> Anthony Davis wrote:
>
> >
> > i can't find anything more than a schematic about
> > diode ladder type filters..anybody got a
> > recommendation? i'm looking to build a VCF that
> > utilizes a diode ladder. i am totally inexperienced
> > too.. hah. well thanks in advance
> >
> > anthony
> >
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