[time-nuts] femtosecond jitter

2018-04-13 Thread John Larkin
-- ** arb John Larkin, President Highland Technology, Inc 18 Otis Street San Francisco, CA 94103 phone 415 551-1700 fax 551-5129 jjlar...@highlandtechnology.com http://www.highlandtechnology.com This is a Highland Technology confidential communication

Re: [time-nuts] femtosecond jitter

2018-04-14 Thread John Larkin
for analysis. Cheers, Magnus On 04/13/2018 05:54 PM, John Larkin wrote: 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

Re: [time-nuts] femtosecond jitter

2018-04-16 Thread John Larkin
On 4/15/2018 2:17 PM, Magnus Danielson wrote: Hi, On 04/14/2018 06:45 PM, John Larkin wrote: Hi, Magnus, We did a little PC board that has two Analog Devices CML comparators that feed the flop.   https://www.dropbox.com/s/05ti1c57eush0uq/99S394A.pdf?dl=0 An external DAC tweaks the VBIAS