[time-nuts] Frequency subtraction with D-flip flops

Mike M timenuts at binsamp.e4ward.com
Tue Jun 25 20:05:39 UTC 2013


  (Original seems to have got lost - try again)

  > More recently  we  are  using   two   D  FF's  for  mixing  in A/V
  > applications and very high resolution frequency  measurements with
  > up to 1 E-15 a second using output frequencies from 0.5 Hz  to 100
  > Hz.

  > Do to attachment limitations if you want more info contact  me off
  > list and I send you some scans.

  > Bert Kehren

  Bert,

  This is very interesting. Can you explain in more detail how you can
  reach 1e-15 in 1 second with those offset frequencies?

  Can you give the input frequencies, the IC type, and how you measure
  the output?

  Thanks

  Mike M



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