[sdiy] easy diode ladder??

[Tim Stinchcombe]

Yves Usson has a page with several links to various diode ladder filters
(near the bottom):

http://yusynth.net/VCS3/index.html

This one in particular looks quite straightforward:

http://masa921.hp.infoseek.co.jp/image/kairo/diodevcf.gif

The PE Minisonic one is also quite simple, but the control voltage part of
the circuit might need re-scaling in some way. The EFM circuit has
voltage-controlled resonance, which adds a little to the complexity.

Tim
__________________________________________________________
Tim Stinchcombe 

Cheltenham, Glos, UK
email: tim102 at tstinchcombe.freeserve.co.uk


> -----Original Message-----
> From: synth-diy-bounces at dropmix.xs4all.nl 
> [mailto:synth-diy-bounces at dropmix.xs4all.nl] On Behalf Of Dan Snazelle
> Sent: 05 June 2008 14:17
> To: goaqihai at yahoo.co.uk; synth-diy at dropmix.xs4all.nl
> Subject: [sdiy] easy diode ladder??
> 
> 
> 
> I am trying to dive into ladder filters and as i have always 
> been intimidated by their design i would like to start with 
> one that is not overly complex.
> 
> can anyone recommend one that is not full of hard to find parts?
> 
> There is one on tim daugaurds site but i cant find a 
> resonance control on it.
> 
> http://home.earthlink.net/~synthfred/h_fal121.htm
> 
> (fal-121 vc diode ladder filter)
> 
> would it be possible to add resonance?
> 
> thanks
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