[sdiy] Analog Computational Unit

[Paul Schreiber]

Yes, the MOTM-510 uses this chip (the cat's out of the bag!!!)

You can also do it with "discrete" log-antilog amps: there are several circuits in the "Non-Linear Handbook" (Analog Devices).

Paul S.

  ----- Original Message ----- 
  From: Ryan Williams 
  To: synth-diy at dropmix.xs4all.nl 
  Sent: Saturday, January 31, 2004 9:20 PM
  Subject: [sdiy] Analog Computational Unit


  I was looking at the analog devices site and I'm came across this IC.
  http://www.analog.com/UploadedFiles/Data_Sheets/737468486AD538_c.pdf

  AD538. It's a realtime analog computational unit with the transfer function: 
  Vout = Vy*(Vz/Vx)^m
  Vy, Vz, and Vx are inputs and m is chosen with resistors. m can range from 1/5 to 5.

  I thought this might make an interesting module but I'm not quite sure how to go about using it for audio.  I wonder if anyone has thought of building something similar? After looking around I found the MOTM wavewarper which seems to do exactly this. I wonder if it uses the same chip.

  this IC costs about $35 but I figure if it sounds cool then it'd be worth it.

  -Ryan
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