Norton Amplifiers (was: Re: Wave Wraper revisted #1)

[mbartkow at ET.PUT.Poznan.PL]

I have a question regarding the ARP4072 filter which is based on 
Norton amplifiers (schematics taken from ARPtech site):

I would like to reconstruct this filter, but what distracts me is
the need of four matched and thermally coupled pairs of pnp transis-
tors. Is there anything against inverting the whole structure and
using npn pairs ? CA3046 (my favorite now) might be used here, 
I suppose.

mb

--

Maciej Bartkowiak, PhD
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