Hi For a 50 ohm buffer, you probably want something like 200 ohms in series with each output (4 buffers) or 400 ohms (8 buffers).
Bob -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Azelio Boriani Sent: Friday, May 18, 2012 7:55 AM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] Buffering a PPS signal Use the 74ABT2244: integrated resitors at the outputs. On Fri, May 18, 2012 at 4:50 AM, Rex <[email protected]> wrote: > In line with what Bob suggests, here is one of the square wave outputs of > an HP Z3816A... > > http://www.xertech.net/**Projects/Z3816/Output_circ.gif<http://www.xertech.n et/Projects/Z3816/Output_circ.gif> > > Or look at the project for context... > > http://www.xertech.net/**Projects/Z3816/3816_mod.html<http://www.xertech.net /Projects/Z3816/3816_mod.html> > > > > > On 5/17/2012 6:17 PM, Bob Camp wrote: > >> 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: >> >> > > ______________________________**_________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/** > mailman/listinfo/time-nuts<https://www.febo.com/cgi-bin/mailman/listinfo/tim e-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. _______________________________________________ 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.
