Env3a Roland MRS-2 type

[tomg]

On 04-Nov-98, jorgen.bergfors at idg.se wrote:
>This is somewhat similar but less elegant (more complicated) than the one
from

>the Doepfer PMS.
>The Roland circuit use switching and PWM to charge and discarge the
capacitor.

>The Doepfer use an OTA that is multiplexed between the different control 
>voltages and charge/discharge the capacitor linearly, like a lowpass VCF. To
>me 
>the Roland approach seems unnecessarily complex.

>/Jorgen





>MIME:vco at mindspring.com on 98-11-04 13.04.04
>To:  synth-diy at mailhost.bpa.nl @ SMTP 
>cc:  (bcc: Jorgen Bergfors/IDGSE)
>Subject: Env3a Roland MRS-2 type 


>Somebody asked for a voltage controlled adsr. At the time
>I didn't have one. So if your the guy here it is. It has
>not been tested yet but it looks very good. 


>http://www.mindspring.com/~vco/maxx2/pics/env3a_sd.gif

>-tg

I would like to see the Doepfer version. Others too I
imagine. Is it on the web somewhere?

-tg