Tom, I recently built such a device using a couple of stages of a 74HC04, with the RF input to the 1st stage AC coupled and the input biased by a high-value (a couple of megohms) resistor feeding back from the output of the first inverter stage to the input of that stage. It's so dirt simple, it's hard to beat.
I was not particularly concerned about jitter, so if you're not already familiar enough with the circuit to know whether or not it's good enough, it might be worth a try. BTW, I am running at 10 MHz from a PRS-10 Rb, and just wanted something to drive a count-down chain. And there's always the 74AC04 if you wanted faster edges. Dana Whitlow On Fri, Jan 19, 2018 at 1:31 PM, Tom Van Baak <[email protected]> wrote: > John's TADD-2-mini [1] uses the Wenzel sine-to-square converter. It > performs very well but requires +10 V. > > I'm looking for a solution that works at 5 V (e.g., USB powered) and also > uses fewer parts. Wenzel also mentions using a differential line receiver > [2]. That would be an ideal single-chip 5 V solution for me but the two > parts he mentions, MC1489 [3] and SN55182 [4], don't appear fast enough for > a 10 MHz input. > > Can any of you circuit experts suggest some line receivers that would > work? Maybe DS9637 [5]? This isn't for cesium work so it doesn't have to be > quite as good as the TADD-2. > > Thanks, > /tvb > > [1] http://www.tapr.org/~n8ur/T2_Mini_Manual.pdf > [2] http://www.wenzel.com/documents/waveform.html > [3] https://www.onsemi.com/pub/Collateral/MC1489-D.PDF > [4] http://www.ti.com/lit/ds/slls092d/slls092d.pdf > [5] http://www.ti.com/lit/ds/symlink/ds9637a.pdf > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
