Speaking of Sine Shapers

[Haible Juergen]

Hi Terry

	>Actually, it is an old trick.  There is a reference in an old EN
that
	>mentioned an article on sine shapers, so I went to the library and
looked
	>it up. The original circuit used a descrete, ovenized, matched
pair.  I
	>tried that and it works, but I also tried a CA3080, which was not
in the
	>original article.
	>
	>The article was from around 1976, if I remember right.

That's what I expected.
I only wonder why anybody would bother to use an external feedback loop
in combination with a *discrete* pair, where emitters are freely acessible
to add local feedback. 

JH.