[time-nuts] 50 ohm Driver
Hal Murray
hmurray at megapathdsl.net
Wed Mar 4 20:03:16 UTC 2015
jra at febo.com said:
> Per Tom Clark, who came up with the idea, they are *not* intended to
> provide a near-end line termination to 50 ohms, but are simply there to
> protect the paralleled devices if the gates have slightly different delays
> (in which case one gate could end up sinking the other two).
Is that a real problem? How far off can the prop delay be for 2 gates on the
same chip?
I seem to remember reading something saying it was OK to just wire them up in
parallel. It could have been an app note, or it could have been a rumor on
usenet.
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