Re: Transfer function reduction math

On 6/11/2024 3:44 PM, Don wrote:

bitrex wrote:
 <snip>
 

Seems like they're doing some kind of tanh interpolation but it's not
entirely obvious to me how they get from equation (3) to the expression
in (5).

 Unless the fuzzy form of your scan deceives my eyes, it appears the
numerator and denominator are multiplied by the conjugate to obtain
(4) from (3).
 A clearer scan may enable me to continue.
 Danke,
 

(not sure if my response posted as I don't see it on my newsreader, apologies if this reply appears twice)
Sure, here's the full page in question:
<https://imgur.com/a/as3jfNo>
I have a hardcopy from an academic library which is a relatively massive (800+) page tome so difficult to get a good scan of...the only full-text online I can find is on Springerlink (blech) and despite my having an "institutional login" that should grant access to it. it never seems to work with them.