Hi Bruce, I for one would like to get the completed circuit seeing as I started the whole thing off and was just getting ready to maybe do a copy of the HP unit. Regards Don....VK3YV.
----- Original Message ----- From: "Dr Bruce Griffiths" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <time-nuts@febo.com> Sent: Wednesday, April 11, 2007 4:34 PM Subject: Re: [time-nuts] Setting Osc Frequencies > Hal Murray wrote: >>> And Hal- what about the pcb layout for Bruce's 74CX version? Had time >>> to look at it yet? >>> >> >> It fell through the cracks when I got interested in something else. >> >> Is anybody really interested in that board? If so, please send me a >> reminder about the schematic. >> >> There have been lots of ideas kicked around recently. Is that still the >> right/best thing to build? >> >> >> >> I've used PCB Express, http://www.pcbexpress.com/ >> >> $125 for 10 boards, 2 layers, no solder mask, up to 9 sq inches >> $265 for solder mask and top silk screen. >> add $45 for silk on the bottom side >> >> Round up for shipping and taxes and whatever. >> >> >> >> >> >> >> > Hal > > For a simple no frills linear phase detector using an AD9901 (available > from Digikey in the 44pin PLCC package)in the ECL mode is a better bet. > It only requires a couple of slow linear amplifiers to scale the output. > No comparators are necessary for the inputs. > Just a few diodes capacitors and resistors are required to terminate the > input cables and protect the differential clock inputs. > > If you want more bells and whistles such as programmable input dividers > etc a CPLD implementation is better. > > Bruce > > _______________________________________________ > time-nuts mailing list > time-nuts@febo.com > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts