[AH] Re: [sdiy] New Envelope Follower design in EDN

[Theo]

Ok Harry, one vote for you.
Who said a SDIY habit only brings one poverty, and scares away the
girlfriend ;)

Some more candy for Magnus his brain.
There is an other interesting envelope follower from Craig Anderton.
It uses the difference signal between two slightly detuned LP filters.
It gives decent results, but Harry's solution is probably faster.

Theo


From: Magnus Danielson <cfmd at swipnet.se>


> From: harrybissell <harrybissell at prodigy.net>
> Subject: [sdiy] New Envelope Follower design in EDN
> Date: Sun, 29 Dec 2002 16:42:53 -0500
>
> > (shameless self-promotion)
> >
> > Vote for "Envelope Follower combines fast response, lowest ripple"
> > by Harry Bissell (me) in the EDN magazine "Design Ideas" 12/26/02.
> >
> > goto:
> > http://www.e-insite.net/ednmag/index.asp
> >
> > and click on "Design Ideas" in the current issue
> >
> > You get an excellent envelope follower, I get some extra cash if my
> > submission is voted "Best of Issue"
> >
> > (shameless self-promotion mode off)
>
> You'll only spend it on BBDs, you poor bastard!
>
> (Sorry, too good to be kept out!)
>
> But now, seriously...
>
> I looked briefly at it. OK, so you run three parallel peak detectors,
reset
> them round-robin and average the output of them all. Interesting idea.
>
> The question then arises if one can do even better?
> Is there more neat tricks we can play out there in the land of non-linear
CV
> processing? I will let that simmer in the back of my head for a while...
good
> to get another problem to think about ;O)
>
> Keep up the good work Harry!
>
> Cheers,
> Magnus