I did some checking around for low noise buffer amps earlier this year. They needed to have 200 MHz bandwidth, so this isn't directly applicable to 10 MHz. I also needed isolation. About the only information in print is from the usual suspects at NIST. They wrote a series of papers taking a fairly classic discrete design and refining it. Check FCS proceedings. My idea was to take ideas from 10 MHz and extend them to 200 MHz. I didn't see any really profound ideas in the NIST papers. There is a reproducibility problem because the original discrete devices may not be available, or NIST might have used special hand picked devices.
BTW, I cringe when I see the term "additive phase noise". Phase noise, as all time nuts know, is NOT ADDITIVE NOISE, as in AWGN. It is multiplicative. The correct term, IMHO, is "residual phase noise". What additive noise refers to is the classic noise figure type noise involving small signals. Again, as all time nuts know, low NF is necessary but not sufficient for low phase noise. Rick Karlquist N6RK _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.