Rectifier for Eurorack?

Jari Jokinen · Posted: Fri May 04, 2007 7:36 am Post subject: Rectifier for Eurorack?

I am sure I need one. Full and half wave rectifiying maybe with offset control.

There is Bananalogue WVX, which according to the manufacturer is "pretty non- linear". If carefully adjusted, Doepfer A-136 is capable of rectifying too, but propably not very well in practice.

As I am not a DIY man, I wonder if I am out of luck? Is anyone interested in building me one?

Best regards
Jari Jokinen

Uncle Krunkus · Posted: Fri May 04, 2007 4:25 pm Post subject:

I don't understand what you're asking, sorry. Confused

bugbrand · Posted: Fri May 04, 2007 6:58 pm Post subject:

Just diodes, surely?!

Half-wave --> one diode
Full-wave--> four diodes (or a bridge recitifier)

Maybe some buffers too and may as well add in some nice bells&whistles to fill up a panel.

Jari Jokinen · Posted: Sat May 05, 2007 9:15 am Post subject:

Uncle Krunkus · Posted: Sat May 05, 2007 4:16 pm Post subject:

Cool,
Initially I thought you were talking about PSUs. Rolling Eyes

Adam-V · Posted: Sun May 06, 2007 4:09 pm Post subject:

I think what you are looking for is a precision rectifier circuit.

This page gives some good information on using super diode circuits to achieve half and full wave rectification. I've been experimenting with the circuits shown and they do work very nicely: http://sound.westhost.com/appnotes/an001.htm

I'm still experimenting with addition of an offset to allow rectification around something other than 0 volts but haven't managed a satisfactory solution to this yet.

Cheers,
Adam-V

blue hell · Posted: Sun May 06, 2007 4:48 pm Post subject:

Jari Jokinen · Posted: Tue May 08, 2007 2:10 am Post subject:

Precision would be needed. I am not sure about the usefulness of the offset setting.