[time-nuts] What is the best counter for a Time Nuts?
XDE-L2G3 at myamail.com
Sun Oct 12 02:52:26 UTC 2008
> You've obviously never tried this, in practice its noise is a lot
> higher than you think, perhaps 2 orders of magnitude worse than a
> double balanced mixer.
> You need to breadboard this and do some tests.
Thank you for the reply. Please let me introduce myself.
I know this circuit very well. I've been using it since 1970, where
it formed the basis of development work that led to my second
patent, US 4533881. Among other things, this patent was the first to
recognize the problem of deadband in the PLL phase/frequency
detector, and shows how to fix it. People still get it wrong even
That patent led to an amazing discovery, documented in the paper:
"Effect of Bitshift Distribution on Error Rate in Magnetic
Recording", Eric R. Katz and Thomas G. Campbell, IEEE Transaction on
Magnetics, Vol. MAG-15, No. 3, May 1979, pp 1050-1053.
This technique saved the hard disk drive industry hundreds of
millions, if not billions of dollars. It did this by separating the
contributions of the head, media, preamplifier, servo system, disk
defects, external EMI, and anything else that affected the error
rate. It gave manufacturing a very quick test to tell if a drive was
meeting the error rate spec, and tells what to do if it failed.
It also gave head and media manufacturers a way to measure the
performance of their products, and a way to meet the competition
that was using the same technique. It told R&D engineers how well
their design was working, and what to do to improve it. It had a
tremendous effect on every disk drive company on the planet, and
there were over 220 at the peak.
I made a great deal of money developing test systems that used this
technique for manufacturers all over the world. I owned a house in
Saratoga Hills in Silicon Valley. I had two Mercedes and three Lexus
for my managers, and gave a bunch of Toyota station wagons to my
staff so they wouldn't have problems getting to work. I helped most
of my staff buy houses. I bought this plane brand new, Piper Malibu
This is a twin turbocharged with constant speed prop, pressurized,
retractable, six-place high performance aircraft with a service
ceiling of 25,000 ft. That is above most of the weather, and I put
over 750 hours on it flying to customers all over the US. It was
truly the nicest plane I have ever had the pleasure to fly, but you
have to watch it on takeoff when the turbos spool up. The torque
will take you into the weeds if you are not ready for it. It is very
nice to see it is still in the air:)
All of this resulted from work using the circuit I described above,
so I know it pretty well. It works a lot better than you think it
It also forms the basis of two of my latest inventions, which will
be disclosed as soon as I have time to get my new web site up and
The old site was finally taken down by Microsoft, so I can't give
you a working url. But at this moment, searching for the phrase
"binary sampler" in quotes gives me the first four hits in google,
so you can see it was up until recently. Unfortunately the WayBack
machine doesn't link to images, so I can't send you there to see how
it works. But I should have the above circuit running around
Christmas, along with some other new stuff.
I'll be happy to discuss these issues when there is hardware to make
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