I did something similar a couple years ago to make an adjustable 75 nanosecond pretrigger for my sampling oscilloscope so I will just pass along some things I learned.
Power supply noise will create jitter in single ended logic because of lack of power supply rejection. Temperature will be a problem with single ended logic also although I did not care about that. The delay section certainly needs to be differential which the LTC6957-1 neatly covers; I was planning to use a comparator or line receiver next time but the LTC6957-1 looks ideal. With the above in mind, I would use a separate reference quality regulator for the supply voltages and any reference levels. I only needed 10s of picosecond stability and picosecond level jitter but I suspect at the level of precision you desire, ground loops need to be avoided even through a solid ground plane. How were you planning on testing the performance? I need to give this further thought but if you only need 1ns worth of control and feed one input of the LTC6957-1 with a 100 MHz sine wave, wouldn't adjusting the level of the other input work to adjust the delay at the output? _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.