[time-nuts] Comparison of Logic Standards for Clock Distribution

[M. Warner Losh]

In message: <007501c6f947$4f1d91d0$7d84e444 at youre7075dc078>
            "jmfranke" <jmfranke at cox.net> writes:
: It is read V divided by the square root of Hertz.

Doh!  rt == root.  I feel silly now.

warner


: John
: ----- Original Message ----- 
: From: "M. Warner Losh" <imp at bsdimp.com>
: To: <time-nuts at febo.com>; <bruce.griffiths at xtra.co.nz>
: Sent: Thursday, October 26, 2006 1:57 PM
: Subject: Re: [time-nuts] Comparison of Logic Standards for Clock 
: Distribution
: 
: 
: > In message: <4540002B.3050807 at xtra.co.nz>
: >            Dr Bruce Griffiths <bruce.griffiths at xtra.co.nz> writes:
: > : But the input voltage noise of the MAX477 is 5nV/rtHz, the corresponding
: > : value for a discrete transistor circuit may be as low as 1nV/rtHz.
: >
: > rtHz is a new one for me (I'm mostly a software dude).  A quick google
: > search shows that this appears in lots of spec sheets as a measure of
: > noise (which I get from this context), but what is that exactly?
: >
: > http://www.ic-designs.com/ICDTechBrief1.pdf gives a nice detailed
: > account of how to calculate this number (V/RTHZ it says), but doesn't
: > define the base unit.  I get the 'Hz' part, but not the 'rt' part.
: > Can someone provide a good reference?
: >
: > Warner
: >
: >
: >
: > _______________________________________________
: > time-nuts mailing list
: > time-nuts at febo.com
: > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
: > 
: 
: 
: 
: _______________________________________________
: time-nuts mailing list
: time-nuts at febo.com
: https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
: 
: