[sdiy] Translinear circuits

[Neil Johnson]

On 7 August 2013 03:00, Pete Hartman <pete.hartman at gmail.com> wrote:
> I stumbled across some information about translinear circuits
> today....  Not a concept I'm familiar with, but I was intrigued at the
> idea of things like being able to do transforms like the pythagorean
> theorem.
>
> Looking a little deeper into what I can find online, it looks like
> current mirrors are examples of translinear circuits, but I can't find
> any examples other than that of them showing up in the
> musical/synthesizer context.
>
> I'm curious whether this is because it's well known and not
> interesting, well known and already explored and descried in different
> ways, or... ?  I figure there's enough collective experience in
> engineering here that someone has a better idea of these things than I
> do.  Anyone have any thoughts to how they could be or have been
> applied?

The approach is expertly described in a book discussed a while back on-list:

http://search.retrosynth.com/synth-diy/search/lookit.cgi?-v1101.8401

Following Phil's suggestion I found a copy on Amazon for not much.  It
is a fascinating book if you're interested in analogue IC design.
Gilbert's chapter 2 is a pleasure to read.

Neil
--
http://www.njohnson.co.uk