I would say the 2 stage "Driscoll" oscillator is the way to go. I have had good luck with it up to 100 MHz. The first stage has the crystal in series with the emitter, but is otherwise a grounded emitter stage. The second stage is in cascode as a grounded base. The important operating condition is that only the second stage limits. First publications on it were in the early 1970's (search Michael Driscoll).
Rick Karlquist N6RK On 2/6/2017 1:06 AM, Yeti Yetos wrote:
Good morning, What's the optimal oscillator topology for low phase noise (low frequency noise and phase noise floor) for 25Mhz/50Mhz/100Mhz frequency range.? Best regards, Rafal _______________________________________________ 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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