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

[Bruce Griffiths]

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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