[time-nuts] Opamp Phase noise: OPA653 additional measurements

Bob Camp lists at rtty.us
Tue Apr 17 21:22:30 UTC 2012


Hi

For what ever reason I've always used a dry towel. I suspect it would also
do pretty well wet...

Bob

-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Magnus Danielson
Sent: Tuesday, April 17, 2012 2:54 PM
To: time-nuts at febo.com
Subject: Re: [time-nuts] Opamp Phase noise: OPA653 additional measurements

On 04/17/2012 06:06 PM, Bob Camp wrote:
> Hi
>
> Tossing a beach towel over it usually does a pretty good job out to 10
> seconds.

Wet or dry towel? (Sorry could not refuse)

Actually, I'm happy to see that someone would try the interferometer 
method. I've never come around to it, but understood it's potential from 
reading Enrico's numerous papers on the subject.

The interferometric front-end is relative cheap for the performance you 
get. You get the sidebands fairly separated from carrier and gained up 
prior to hitting any mixer.

Cheers,
Magnus

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