Hi Parallel up as many inverters (or logic buffers) as you feel you need. Much less delay than the MOSFET drivers. Small packages for easy layout. Run off of 5 volts (or what ever…). Put a resistor in series with the output of each of them and they will equalize very well.
Bob On May 17, 2012, at 7:35 PM, Michael Tharp wrote: > Greetings, > > As I mentioned briefly a few days ago I'm working on an interface board for > the Trimble Resolution SMT carrier board to provide a convenient way to get > power in and PPS/serial out. The PPS output is a 3.3v, 125 microsecond long > pulse and I'd like to buffer it with something that can drive a 50 ohm > terminated line. What's the best way to go about doing this? I've looked at > using a MOSFET driver like FAN3111ESX but most of these have a moderate > (30-50ns) delay with a moderate temperature coefficient, but perhaps I'm > expecting too much. > > For people interested in buying the board, it will have USB and RS-232 (with > PPS on the Carrier Detect line) plus the 50 ohm PPS output on BNC. > Physically, it's the same size and shape as the RSMT board itself and will > fit directly on top. Total cost should be about 20 USD. > > Current schematic is here, comments welcome: > http://partiallystapled.com/~gxti/circuits/2012/05/17-piggyv2.png > > Cheers, > -- m. tharp > > _______________________________________________ > 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.
