[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 


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