AW: OTA preference

Haible Juergen Juergen.Haible at nbgm.siemens.de
Wed Apr 12 14:19:51 CEST 2000


	>Or how about just the reverse,
	>Which of these are seem to sound the best overdriven purposely with
or
	>without diodes involved and have the best S/N in that application?

I think a tanh function is a tanh function is a tanh function.
So I don't expect any difference in terms of "coloration" (distortion)
between any non-linearized differential pair input circuits.
What sets individual devices apart are offset voltage (VC feedthru)
and, of course, noise.

As for the different linearizing schemes of SSM2020, CA3280
and LM13700, I'm not so sure. I've learned (from this list) that
the resistor method of National Semiconductor is not as
inferior to the current source method of the other devices
as I used to think. The NS data sheed doesn't tell a word
about it, though. I wonder if this would be a question worth
of Bob Pease's mailbox, but I have so far hesitated to ask.

JH.




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