[time-nuts] High rate, high precision/accuracy time interval counter methods

[Hal Murray]

attila at kinali.ch said:
> The limit for TDCs in FPGAs seems to be around 5-20ps RMS (which makes it
> more like 15-50ps in "real" precision)  depending on type and technology.
> Going down to below 20ps usually means to take the latest tech FPGA with
> lots of redundant structures, which makes the whole thing quite expensive. 

FPGA prices generally scale with the amount of logic.  How much do you need?  
The smaller FPGAs are usually not expensive.

(Yes, the large ones can be very expensive.)


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