Thank you Alex I have that info I am concerned about rise time Bert Kehren
Sent from Samsung tabletAlexander Pummer <[email protected]> wrote: look Charles Wenzel's waveform conversion: http://www.wenzel.com/documents/waveform.html 73 Alex On 7/10/2014 11:40 AM, [email protected] wrote: >> On July 10, 2014 at 10:55 AM [email protected] wrote: >> >> >> As part of the FE 405 B project a separate output circuit is in the works. >> The universal controller and auxiliary board are the same as used in the >> FE5680A GPSDO but because of the very low ADEV a separate circuit board that >> divides by three and has also two ground isolated transformer outputs is in >> the works.The question is what is the best sine to square wave converter >> with the lowest ADEV contribution. I am looking at Bruce's circuit using the >> ADCMP600. Any other ideas? >> Thanks Bert Kehren >> _______________________________________________ >> 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. > Although CERN likes that circuit for its ruggedness and versatility its a > little noisier than some alternative circuits. > > Currently Linear Technology's sine to square wave devices with selectable > filtering (LTC6957 series) are better in that they are a closer approximation > to > the ideal zero crossing detector. > Failing that the next best is perhaps an AC coupled (both at input and > between > emitters) differential pair of 2N3906's or similar. > > Bruce > _______________________________________________ > 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. _______________________________________________ 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.
