[time-nuts] Soundcard sampling Re: Picking a good HP 10811

Bruce Griffiths bruce.griffiths at xtra.co.nz
Wed Dec 3 02:31:50 UTC 2008


Stanley Reynolds wrote:
> Found a basic common base amp would need to adjust values for 10Mhz
>
> <a href="http://s307.photobucket.com/albums/nn306/stanleyreynolds/?action=view&current=commonbaseamp2.jpg" target="_blank"><img src="http://i307.photobucket.com/albums/nn306/stanleyreynolds/commonbaseamp2.jpg" border="0" alt="Photobucket"></a>
>
> and this common emitter :
>
> <a href="http://s307.photobucket.com/albums/nn306/stanleyreynolds/?action=view&current=JPLCEtwostage.jpg" target="_blank"><img src="http://i307.photobucket.com/albums/nn306/stanleyreynolds/JPLCEtwostage.jpg" border="0" alt="Photobucket"></a>
>
> Links if the html doesn't work :
> http://i307.photobucket.com/albums/nn306/stanleyreynolds/commonbaseamp2.jpg
> http://i307.photobucket.com/albums/nn306/stanleyreynolds/JPLCEtwostage.jpg
>
> Did not find the circuit for the NIST design just a article that mentions it.
>
> Stanley
>
>   
Stanley

Most of those amplifiers would have poor close in phase noise performance.

The following page illustrates several isolation amplifier designs and
has links to most of the relevant papers from NIST and elsewhere.

http://www.ko4bb.com/~bruce/IsolationAmplifiers.html
<http://www.ko4bb.com/%7Ebruce/IsolationAmplifiers.html>

Bruce



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