There was a pic app note on alternate uses for the cap sense block a while back, not sure it that it will push you into the ps.
On Thursday, 28 July 2016, Jerome Blaha <jbl...@polariswireless.com> wrote: > Hi Guys, > > This is a little outside of time-nuts scope, but not by much. I'm > interested in finding the time between two rising edges above a set > threshold with preferably nS or high ps timing accuracy. Can this be > simply done with a few programmed Microchip PICs or with a good short term > OCXO clock? The issue I see is that a 10Mhz timing reference with 1 cycle > difference in time yields 100ns resolution, which is far too large, so > maybe a PIC can solve this. > > This weekend project would be a multi-element antenna array, each with a > super-fast response log peak power detector fed into several PICs for time > of arrival. Whenever a nearby high energy RF pulse is detected, the time > of arrival between two antenna elements and hence the direction toward the > TX could be roughly computed. Some typical log peak detectors have an 8ns > input pulse response time, so I'm hoping that rise times are similar > between multiple detectors, negating the delayed response. > > There are time of arrival/AoA systems out there with synthetic doppler, > phased arrays, correlative interferometers, and phase comparators, but it > would be interesting to accomplish super wideband AoA timing on two rising > pulses with relatively cheap parts. > > Thanks, > > -Jerome > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com <javascript:;> > 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.