This is sort of a FAQ: the argument was already discussed here. One of the most interesting idea (in my opinion) is to use an RS485 line receiver like the ST3485, MAX483, ADM485. They are actually transceivers so they must be tied permanently in RX. Since they are differential you can also put a 1:1 (or a 1:4 to raise the level) transformer to isolate the input too.
On Thu, Jul 19, 2012 at 6:03 PM, Chris Hoffman <[email protected]> wrote: > Can anyone suggest a good reference design for a zero-crossing detector? I > am trying to home an ADC sampler trigger to the 1VRMS (50ohm) 10MHz sin > from my XL-DC... And now I'm thinking that I should just home the uC clock > to it, as well. > > Essentially, I believe that I'm looking for an efficient, stable, and > accurate sine-to-square converter... and I'll welcome any advice in this > area. > > This may also be used in a 1KHz 5Vpp IRIG-B decoder... I don't feel like > rectifying the signal, to be honest. I want to try to keep a smaller BOM, > sense the waveform primarily, and crunch numbers inside the uC. > > > -CH > > Chris Hoffman > [email protected] > http://ar.ctur.us > > > > > _______________________________________________ > 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.
