Japanese duals (was: Re: CA3046,SSM2210&2220 Replacements)

[Haible Juergen]

	>I had a look at the SEM vco schemo today. What is the exceptional
feature there?
	>I can only see a temperature and maybe parameter compensated fet
buffer.
	>
	>Please some enlightenment.
	>
	>m.c.

Yes, it's "only" a fast buffer.

I do not know if, or how closely, the FETs are matched in the SEM.
But in general, without matched FETs, if you want to make a buffer
stage you normally have the choice between slow (opamp ...)
or high offset (discrete ...). If you want fast and low offset at the same
time,
a matched FET pair is very useful.

JH.