[time-nuts] Precision DACs

Richard (Rick) Karlquist richard at karlquist.com
Tue Jul 26 14:46:05 EDT 2016

On 7/25/2016 10:42 PM, Scott Stobbe wrote:
> dramatically different due to glitching on code transition. That being
> said, they are kept separate not to confuse sources of error.


The 5071A has a "home brew" DDS that was designed by the late
(and great) Robin Giffard.  He used what he called a "blanking"
circuit that disconnected the DAC during the time period when it
is at risk for glitching on code transitions.  He described it
in terms of some new innovation he had invented.  It seemed to
me an "obvious" (that loaded word) idea that surely must have
been used before.  In any event, he was clearly doing something
right (as usual).


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