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Old November 18th 03, 04:09 AM
Michael A. Terrell
 
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J M Noeding wrote:

Hi

for my quite unstable counters I've got some 0.1ppm 9.6MHz VCXO's
(guaranteed over temperature range -20...+20°C), the problem is that
the original XO is 1MHz with 7490 divider, and now I need a divide by
96 downcounter. The VCXO drives a 74LS14, so it shouldn't be any fan
out problem, but I am not aware what is the readily available divider
to choose. The counter is mentioned on
http://home.online.no/~la8ak/m21.htm , but it is Norwegian text

hpe 2 hr fm u

73
Jan-Martin, LA8AK
http://home.online.no/~la8ak/d.htm
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remove ,xnd to reply (Spam precaution!)


Search through Goggle groups in sci.electronics.design for a divide
by 3 counter, and follow it with five stages of divide by 2 counters.


96/3 = 32
32/2 = 16
16/2 = 8
8/2 = 4
4/2 = 2
2/2 = 1

You want the odd counter somewhere before the final stage to maintain a
50% duty cycle.
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Michael A. Terrell
Central Florida