Some updates. I finally decided to add some features in order to use the board as a "generic" prescaler. First, I will include a standard SMA footprint in the output stage and a way to power the board externally. Then I will change the original PIC UP for a better one, with more memory, and add a 4-way selectable ratio feature by onboard solder jumper. The board will be able to act as a /100, /128, /512, /1000 generic prescaler. I wonder about the needs for /256 and /500 options. If someone have some interest for those ratios, let me know. Finally, the PCB size will be approx. 100 x 50 mm. I know it could be smaller, but I have to do with the counter's mounting holes.
PS : I'm looking for a source for RF chokes (MMIC Power stage) useable from DC to 8+ GHz. -----Message d'origine----- De : [email protected] [mailto:[email protected]] De la part de Grant Hodgson Envoyé : vendredi 26 mars 2010 20:10 À : [email protected] Objet : Re: [time-nuts] Low cost 6+ GHz Prescaler I've used the RFMD NBB300/310 and they are excellent up to 14GHz. The NLB300 and NLB310 are in plastic packages and are somewhat cheaper than the NBBs, but have similar gain characteristics. They don't do strange things when compressed; I've driven them right up to the abs. max i/p power level and they survive, and I don't see any evidence of harmonic problems when driving a Hittite HMC364 /2 prescaler. They do exactly what it says on the datasheet. regards Grant Hodgson > > RFMD seems to produce some nice MMIC, for example the NBB-300 > (http://www.rfmd.com/CS/Documents/Nbb-300.pdf), but I never used a RFMD > amplifier. I used Agilent/Avago MMIC since years with great results, but > always with frequencies no more than 3 GHz. > > Anyone have some experience with DC-8/12 GHz MMIC and which's the best ? > > _______________________________________________ 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.
