[time-nuts] Digital Mixing with a BeagleBone Black and D Flip Flop

Bob Camp kb8tq at n1k.org
Thu Oct 16 17:33:00 EDT 2014


I guess I should have been a bit more specific. 

The latest paper is from about 10 years after their papers on limiters. I wonder if they have any “new stuff” in the limiter part of the new(er) system. I also wonder if there’s been any progress in the 8 years since the latest paper.


On Oct 16, 2014, at 8:22 AM, Jim Lux <jimlux at earthlink.net> wrote:

> On 10/16/14, 3:59 AM, Bob Camp wrote:
>> Hi
>> I wonder what they are using for the “lpf / zero crossers” in that version.
> Aren't those the usual limiter chain? Described in earlier papers by the same folks.  There was a lot of discussion about this architecture on the list a few years ago.
> https://www.febo.com/pipermail/time-nuts/2006-October/021837.html
> Here's something you might want to take a look at:
> http://www.wriley.com/A%20Small%20DMTD%20System.pdf
> By the way.. here's the reference from the list
> Dick / Kuhnle / Sydnor: "Zero-crossing detector with sub microsecond
> jitter and crosstalk"
> http://tycho.usno.navy.mil/ptti/1990papers/Vol%2022_20.pdf
> www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA515384  the paper
> http://www.dtic.mil/cgi-bin/GetTRDoc?AD=ADA239372  the entire PTTI proceedings
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