New S&H all tranny
tomg
efm3 at mediaone.net
Sat Jul 15 19:09:17 CEST 2000
Well I finally did it.....an all tranny S&K. The core
gm cells are similar to Juergen's 4P 2040 but the
form is pure MS-20 S&K. I found a way to alter
the gm cells so that they look a little different by
using a NPN/PNP buffer but it's basically the
same. I might as well use the darlington, that
way I can use a 3046 and a couple of 3906s.
I think it would work just as well. As long as
there is no shortage of 3046s we might as well
use them and as long as dual opamps are available
we might as well use those too. So the final design
will most probably contain no trannny pairs at all.
Ironic huh?
I replaced the opamps with a variant of the new
discrete 3 transistor things and used the C1583/
A798 pairs for gm cells in the transistor
version. JIC you were curious.....;-)
Tom
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