US 9,811,110 B2
System and a method of deriving information
René Krog Josiassen, Værløse (DK); and Søren Kragh, Valby (DK)
Assigned to Napatech A/S, Søborg (DK)
Filed by Napatech A/S, Søborg (DK)
Filed on Oct. 28, 2015, as Appl. No. 14/924,876.
Claims priority of application No. 14190666 (EP), filed on Oct. 28, 2014.
Prior Publication US 2016/0116935 A1, Apr. 28, 2016
Int. Cl. G06F 1/04 (2006.01); G06F 3/05 (2006.01); H04J 3/06 (2006.01)
CPC G06F 1/04 (2013.01) [G06F 3/05 (2013.01); H04J 3/0697 (2013.01)] 27 Claims
OG exemplary drawing
 
1. A system comprising:
a master clock domain having a master clock and a master processor, the master clock being configured to output master points in time and
a plurality of candidate clock domains each having:
a candidate clock configured to output a candidate clock signal,
an event signal input,
a first and a second asynchronous register and
a candidate controller configured to receive a first point in time from the first asynchronous register and a value from the event signal input and feed, timed by the candidate clock signal, at least a second point in time relating to the first point in time to the second asynchronous register,
where:
the master clock is configured to provide an actual master point in time to the first asynchronous registers and
the master processor is configured to read the second points in time of the second asynchronous registers and derive first information therefrom.