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From: Winfield Hill <hill@rowland.harvard.edu>
Newsgroups: sci.electronics.design
Subject: Re: really fast buffers
Date: 7 Oct 2018 07:19:42 -0700
Organization: Rowland Institute
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Gerhard Hoffmann wrote...
>
> BTW, I have built a variation of Winfield's 70 pV/rtHz amplifier
> from AoE3.  The non-differential version, since my source is
> never centered around 0 Vdc.  Works as promised. :-)
>
> Yes, it could use even more 'lytics, but that was a test balloon for
> a chopper amplifier.  At 500 kHz the caps are no more that critical.
>
>https://www.flickr.com/photos/137684711@N07/45141749941/in/album-72157662535945536/

 Nice!  Please post your complete schematic.  We only show a
 common-emitter amplifying stage, with millions of paralleled
 transistors, and our measurements, pages 506-509.


-- 
 Thanks,
    - Win