[sdiy] why 10V

[Magnus Danielson]

From: "jhaible" <jhaible at debitel.net>
Subject: Re: [sdiy] why 10V
Date: Sat, 20 Sep 2003 23:19:27 +0200

Bonjour Jürgen,

> >> Seems like the essentially linear systems theory isn't adressing this
> >> because its a nonlinear problem. So I wouldn't expect to find a formula
> >> for it.
> >
> >Non-linear? Where is the non-linearity? The Hilbert transform is a
> perfectly
> >linear and doesn't change properties over time. That you can't realize a
> >perfect Hilbert transform is another thing...
> 
> Right. It's linear, time-invariant, but non-causal. (Hope this word exists
> in English; German: "akausal")

Adequate terms. I had just a mental blocking for them when I wrote it, but that
is what I _meant_ to say. Thanks for that!

> >(PWM), but in practice there we keep the peak-to-peak voltage
> >stable and let the RMS voltage drop
> 
> Notable exception: Korg PS series. Here, the pulse amplitude is changed with
> pulse width. Unfortunately, it doesn't preserve the RMS value, either,
> because it makes shorter pulses lower instead of higher.

OUPS!

Somebody have had to do something like it anyway.

Now, did they spend extra hardware to get it or is it a consequence of the
hardware design?

Cheers,
Magnus