[sdiy] LM13600 Gain Question

[Magnus Danielson]

From: Scott Gravenhorst <music.maker at gte.net>
Subject: Re: [sdiy] LM13600 Gain Question
Date: Fri, 23 Jan 2004 13:07:59 -0700
Message-ID: <200401232107.i0NL7xK23772 at linux6.lan>

> Ok, I get this.  JH's comment makes sense too.  Tailoring that actual range
> of gain means messing with input and/or output resistors and that depends on
> the max input expected and max required output. 

Remember that the inputs can't take that much voltage-difference for linearity
reasons, so that's why you see the damping at the input. That part you should
adjust depending on the range of the input voltages.

Oh, that standard offset-trimming pot is a seriously bad way of doing it.
Reason? When adjusting it for input offset correction, you also changes the
gain of the input-damping and thus of the whole curcuit.

> Bottom line for me means rough calcs and throwing it on the SBB to fine it
> out.
> 
> Thanks guys, this is what I needed.

Well, that is what Synth-DIY is about - sharing info!

Cheers,
Magnus