[time-nuts] Distribution amplifier architectures - mini-tutorial

Charles Steinmetz csteinmetz at yandex.com
Sun Jan 31 11:11:06 UTC 2016

I mentioned some time ago that I had posted a document to Didier's 
site that discusses various distribution amplifier architectures.  It 
has now been moved into the "general population" and can be found at:


or by searching for "distribution amplifier architectures" using the 
search box at:


I also posted a mini-tutorial on the '390 dual decade counter/divider 
(74HC390, 74LS390, etc.), which I put together for a time nut who is 
new to digital counters.  It explains the basics of how a '390 works 
(but not advanced techniques using the "Reset" inputs) and shows 
connections for using one half of a '390 as a divide-by-10, and using 
both halves as a divide-by-10 and divide-by-2 (5MHz and 1MHz from 
10MHz).  It can be found at:


or by searching for "390 decade counter operation".

Best regards,


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