[time-nuts] Homebrew Rubidium oscillator, jitter and other tales :-)
Richard (Rick) Karlquist
richard at karlquist.com
Sat Aug 7 17:31:05 UTC 2010
ulmann at vaxman.de wrote:
> blinked. This problem was eventually solved by driving the LED with a discrete
> transistor instead of a free 74AC14 gate and decoupling this driver with an
CMOS logic gates have a totem pole output that is famous for "overlap"
where both transistors on briefly turned on at the same time, resulting
in large current spike from the power supply. It would be interesting
to see if this was the problem, or whether it was the "antenna"
connected to the output.
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