[time-nuts] femtosecond jitter

[John Larkin]

If you walk the differential data and clock inputs of an NB7V52  CML 
flipflop across one another in time, the equivalent jitter is below 20 
fs RMS. That's what we're measuring, but our test rig may well dominate 
the jitter, so the flop is probably better.

We're using this to test the jitter of some of our timing products, with 
1/10 the noise floor and 1e-4 times the cost of other ways to do it.

https://www.dropbox.com/s/1i2yz7otty94o9l/NB7_Jitter_1.jpg?raw=1

https://www.dropbox.com/s/qahpb8uh1xr53vj/NB7_Steps.jpg?raw=1

https://www.dropbox.com/s/tpphhi79yxgzy34/NB7_tc.jpg?raw=1


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John Larkin, President
Highland Technology, Inc
18 Otis Street
San Francisco, CA 94103

phone 415 551-1700   fax 551-5129
jjlarkin at highlandtechnology.com
http://www.highlandtechnology.com

This is a Highland Technology confidential communication