Taking a look for it also turned up a recent time-nuts thread https://www.febo.com/pipermail/time-nuts/2016-May/097801.html
On Thursday, 28 July 2016, Scott Stobbe <scott.j.sto...@gmail.com> wrote: > 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 > <javascript:_e(%7B%7D,'cvml','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 >> 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.