[sdiy] ems style diode ladder

[Rob]

Well, I *could* be wrong, but I always thought that if you used a setup similiar to the tb303 filter (which is, in essence, a diode ladder filter using the diodes within a trannie) and ran the filter with a wider supply range (I think it runs from 12 v to 5 v) So, if you ran it off of, oh, say 12 v to 0v or +/- 12v, you could probably get it to self-oscillate and do all that fun stuff we love so well that occurs with the EMS style diode filter.

Someone correct me if I am wrong.. But, it always looked to me that if the supply rails were converted to a higher voltage, it would run into self-osc. Also, too, this *might* stabilize the pole migration..

I hate it when those poles migrate too much.. Everyone ends up with last names that end in "ske" , "ski", "sky", and "kcy" and have lots of consonants.  ;))


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  ----- Original Message ----- 
  From: Benjamin Smith 
  To: synth-diy at node12b53.a2000.nl 
  Sent: Saturday, April 07, 2001 9:36 AM
  Subject: [sdiy] ems style diode ladder 


  i wonder if anyone knows of any diode ladder low pass filter resources, i only seem to be able to find the transistor type. a description of the circuit operation would be very helpful. i found a schematic at

  www.haint.com/synth-diy/emsfilt2.gif

  and looked for the book that the circuit is sourced from but was unable to find it. if anyone could point to resources then i would be much obliged
  thanks

  ben


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