HCPL7101 and similar 50MBaud optocouplers claim 50ps rms jitter. Some non optical isolated couplers specify ~30ps jitter.
Bruce > > On 01 September 2017 at 00:12 Anders Wallin <anders.e.e.wal...@gmail.com> > wrote: > > Hi all, > I'm looking for a solution for galvanic isolation of a 1PPS signal-input > to > a distribution amplifier. > > We have an old box using HCPL-2411 at the input followed by 74LS04, but > the > degraded rise-time (from below 3ns out of a clock, to >12 ns out of the > box) and increased jitter (from below TIC-resolution of 20ps out of the > clock to 700ps std.dev at 100s out of the box) are now limiting our > measurements. > > Does anyone have experience with a circuit with good rise-time and low > jitter? > Should I look for better optoisolators, or pulse-transformers, or > something > else? > > thanks for your input! > Anders > > PS. I started on publishing my distribution-amplifier (non isolated) on > the > ohwr.org site, see https://www.ohwr.org/projects/pda-8ch-fda-8ch/wiki/wiki > > _______________________________________________ > 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. > _______________________________________________ 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.