Hi everyone, On 2016-08-11 21:06:12, Attila Kinali wrote:
Hoi Bert,
I'm asking, because if you go the way of using a CPLD anyways, you could throw in another $2 for an opamp to build a time-to-amplitude converter (à la PICTIC II) and boost the resolutiong from 40ns to <100ps. As you would be measuring the PPS relative to the local clock, you would need only one "leg" of the PICTIC II (ie just one TAC plus a single ADC).
I'd want to use the programmable logic to build a (mostly) digital interpolation, either something along the lines of the 5370, or digital interpolation of the clock using DCM's like I did on a Spartan-3 years ago. On that device, I could achieve a 16-fold resolution increase by use of the clock management devices.
I'm currently trying to replicate my old digital clock interpolation setup on the Xilinx/Digilent Arty board, with the aim of locking a Rb to GPS. Another goal is to get a DDMTD going on the Arty board for clock comparisons.
Regards, Paul Boven. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
