[time-nuts] J06 HP-59992A time interval calibrator for HP-531xx counters

Hal Murray hmurray at megapathdsl.net
Mon Jul 10 00:00:41 EDT 2017

> I hope the XOR doubler works well.

I think the initial comment about using a XOR mentioned a couple of gates for 

A trick from the old FPGA days.  You can guarantee that the pulse is wide 
enough to clock a FF if you put a FF in the chain.  That is replace the 
gates-for-delay with a FF.  Use the pulse to clock the FF and feed the output 
of the FF to the other side of the XOR.  (You may need some delay on the 
input to the FF to meet setup time.  You have the XOR delay to start with.)

These are my opinions.  I hate spam.

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