Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread KA2WEU--- via time-nuts
2 points: First I do not get copies of my own mail... strange . Second a complete treatment including the results is in http://ieeexplore.ieee.org/document/7546729/ These results are superior to other publication , and the paper is complete. Probably only very few do a complete

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread Gerhard Hoffmann
Am 06.02.2017 um 14:08 schrieb Richard (Rick) Karlquist: Agreed, for low phase noise FLOOR, it is imperative to take the signal out through the crystal. However, for close in noise (say ADEV at t=1), the Driscoll has worked well for me. I have been able to reach ADEV = 10^-11 at 100 MHz at

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread Richard (Rick) Karlquist
Agreed, for low phase noise FLOOR, it is imperative to take the signal out through the crystal. However, for close in noise (say ADEV at t=1), the Driscoll has worked well for me. I have been able to reach ADEV = 10^-11 at 100 MHz at using suitable resonators. Rick On 2/6/2017 4:35 AM,

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread KA2WEU--- via time-nuts
That is the pragmatic deflection reply . but essentially you are correct In a message dated 2/6/2017 7:57:26 A.M. Eastern Standard Time, kb...@n1k.org writes: Hi One could easily spend years answering this sort of question. Several people on the list *have* done so. Two of them

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread Bob Camp
Hi One could easily spend years answering this sort of question. Several people on the list *have* done so. Two of them have already tossed up answers. What are you trying to do? What is your definition of “low”? How well equipped are you to test this sort of thing? How much tweaking are

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread KA2WEU--- via time-nuts
Not quiet, using the crystal also as filter gives much better numbers , 73 de Ulrich N1UL In a message dated 2/6/2017 7:30:33 A.M. Eastern Standard Time, rich...@karlquist.com writes: I would say the 2 stage "Driscoll" oscillator is the way to go. I have had good luck with it up to

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread Richard (Rick) Karlquist
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

Re: [time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread KA2WEU--- via time-nuts
A optimized Colpitts circuit 73 de Ulrich In a message dated 2/6/2017 5:30:17 A.M. Eastern Standard Time, rtoporow...@gmail.com writes: Good morning, What's the optimal oscillator topology for low phase noise (low frequency noise and phase noise floor) for 25Mhz/50Mhz/100Mhz

[time-nuts] Optimal oscillator topology for diffrent frequency range

2017-02-06 Thread Yeti Yetos
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