The optimum sine to square converter is embodied in the Collins style limiter approach consisting of a cascade of limiting amplifiers each with suitable individual gain and individual bandwidth, the gain and bandwidth increasing for each successive stage until the output slew rate is sufficient to drive a comparator without the comparator contributing significant additional jitter. Other approaches invariably produce greater output jitter.details here: Bruce's: Zero Crossing Detectors - KO4BB
| | | | | | | | | | | Bruce's: Zero Crossing Detectors - KO4BBHelp keep this site free: (More Info) New: The Thunderbolt Monitor Kit is now available! Bruce's: Zero Crossing Detectors | | | | View on www.ko4bb.com | Preview by Yahoo | | | | | Bruce From: Stéphane Rey <steph....@wanadoo.fr> To: 'Discussion of precise time and frequency measurement' <time-n...@febo..com> Sent: Friday, 1 July 2016 8:45 PM Subject: [time-nuts] DMTD downmixer question Hi there, I will receive my SR620 soon and want of course to use it as well for stability measurement using the DMTD method. I've read many things on how to design the downmixer. There will be a DDS or low noise generator as LO, the two mixers, and the squarer. There are apparently many ways to do the squarer. Some of the ways I've seen are using fast comparator, logic gate, fast amplifiers... Finally is there a way which looks better than the others ? I was hesitating between a fast comparator and an ECL logic gate for instance. Thanks & cheers Stephane _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.