Doepfer

Hello, please, can you tell me what I can do it for no recieve more mail form Doepfer group? Thanks and best from Barcelona



To: Doepfer_a100@yahoogroups.com
From: hardware@doepfer.de
Date: Fri, 4 Apr 2008 17:11:59 +0200
Subject: AW: [Doepfer_a100] simple fixed slew limiter?



















    
            > hi group,

>

> i was wondering if it's possible to build a simple (passive?) slew

> limiter with a view to rounding off a gate signal enough to

> reduce/remove the clicks produced by controlling vca's with gate signals.

>

> i googled, but came up with a ton of stuuff that's a bit more than i

> need.

>

> i need no voltage control, indeed not even a variable slew rate.

>

> any ideas?

>

> thanks,

>

> stu



The simple low pass on the DIY page should do the job. The values for R1 and

C1 depend upon the desired slew rate which is ~ R1*C1. With 1uF and 10k you

obtain ~ 10 ms slew rate. The upper half of the A-170 uses this circuit

(with R1 as a combination of a fixed resistor and a potentiometer) followed

by a buffer amplifier to avoid voltage losses caused by the load connected

to the R/C combination. But for simple Gate/VCA control a small voltage loss

should not be a problem.



Best wishes

Dieter Doepfer




      

    
    
	
	
	
	


	


	
	
	
	
	


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