[time-nuts] time-nuts Frequency Divider
Magnus Danielson
magnus at rubidium.dyndns.org
Sat Apr 4 12:35:56 UTC 2009
John Ackermann N8UR skrev:
> Ulrich Bangert said the following on 04/04/2009 06:13 AM:
>
>>> As a curiosity, there are various variants of the original 4046 which
>>> has different sensitivity on the input side... one of them
>>> has several inverters in a row to get the needed gain where as the other
>> variant
>>> does not. This difference made a huge difference in some applications.
>> are you going to say with that it would be reasonable to test different
>> brands for input sensivity? I have been believing that all brands have this
>> inverter chain.
>
> Brooks Shera used the 4046 as the input conditioning circuit in his
> GPSDO that was published quite a while ago. I seem to recall that he
> noted only certain brands seemed to work well, but I don't recall the
> details.
Maybe using a 4069UB and a small handful of passives would be a better
solution?
Cheers,
Magnus
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