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

[Don Tillman]

   Date: Mon, 5 Jul 1999 21:01:42 +0200
   From: 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? 

You would have to invert the Norton amps too.

  -- Don