Hi Stephanie, I have a similar issue, I can never tell if my messages post or not, some I get back instantly others never show up in my inbox. I think the mail server was just updated.. To answer your questions: 1) attached is the PN plot of the 1.0GHz version. 2) Here is a datasheet for the part: http://www.jackson-labs.com/index.php/products/uln_1g The tricky part in your proposed setup will be getting a 100MHz crystal with low enough phase noise so that the 20log(N/M) added phase noise won't be a problem - +20dB added after all. On our part some of the tricky design issues were size and power as well as the high output power of +22dBm, and a requirement to maintain the output power to within 0.5dB over the entire -40C to +85C temperature range. bye, Said In a message dated 9/15/2014 09:40:37 Pacific Daylight Time, steph....@wanadoo.fr writes:
Hi, It sounds like all my messages need moderator approbation. Is it the rule on the list or a technical problem at my side ? Cheers Stephane On Mon, 15 Sep 2014 09:17:01 -0700, Said Jackson via time-nuts <time-nuts@febo.com> wrote: > Hi Stephanie, > > Welcome to the list! > > We designed a 1GHz crystal LO for PLLs (the ULN-1G) using an off the > shelf miniature 500MHz crystal oscillator which is run at 3 rd > overtone internally then using a diode doubler and a steep bandpass > filter using several Mini Circuits ceramic filters and a 20dBm amp. > > Works like a charm and has phase noise very close to theoretical.. > > Bye, > Said > > Sent From iPhone > >> On Sep 15, 2014, at 5:50, "steph.rey" <steph....@wanadoo.fr> wrote: >> >> Hi the list, >> >> Just wanted to introduce myself for my 1st message. >> I'm Stephane, 40, living in France, at the moment working in RF & >> electronics for a particles accelerator lab. I'm hamradio as well, and >> I do enjoy especially weak and accurate signals. >> I'm desiging various RF circuits. Current design is a universal PLL >> able to operate from 0.5 to 6 GHz depending on the VCO and supposed to >> be "low-jitter" (<1ps) regarding the application. >> I'm also starting a new design of low noise PLL and there will be >> probably a lot of question arising... I'm starting with the 1 GHz LO >> made upon a 100 MHz VCXO + multipliers/filters/MMICs. >> I want to focus deeper on low phase noise/jitter, synchronization >> and low-noise PLL techniques. >> I believe this is a good place for most of these topics. >> >> >> 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.
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