[sdiy] Serge and multiples

[Magnus Danielson]

From: "Happy Harry" <paia2720 at hotmail.com>
Subject: Re: [sdiy] Serge and multiples
Date: Mon, 05 Mar 2001 15:20:19 -0000

> Most folk worry about inputs. Bipolar processes are pretty good
> for static handling. If you were REALLY leery, you could split that
> series output resistor, and use MOV, zener, or fast diodes to the rails to 
> either eat the static discharge, or direct it to a place where it can 
> dissipate harmlessly.

Certainly a good idea. Some thought should be spent so that you do not
add excess nonlinearity when not wanted. Also, some of these can be
temperature sensitive, which would not be good at a CV input. If just
some considerations are taken it is safe from both persepectives.

> But I've never seen a bipolar opamp die of static discharge at the output, 
> or even degraded operation. This is more likely if you are using a voltage 
> follower (output tied to inverting input) than a
> unity gain inverting stage (with resistors in the feedback).
> 
> Still I would not worry... I'm not landing my synth on MARS if you know what 
> I mean  ;^)

But if you make a synth and sell it, you don't know where their acid
house trips take them... surely you are a grownup boy enought to seen
that happend before? ;^)

Cheers,
Magnus