Hi I suspect that built from discrete parts you will simply have an audio / square wave oscillator. It's a classic multivibrator circuit….
Bob On Aug 10, 2013, at 11:13 AM, Azelio Boriani <[email protected]> wrote: > Build it from discrete parts, of course, what frequency do you suggest > to try? 32768Hz, 1MHz? I have nothing in-between... > > On Sat, Aug 10, 2013 at 5:04 PM, Magnus Danielson > <[email protected]> wrote: >> On 08/10/2013 12:10 PM, Attila Kinali wrote: >>> On Sat, 10 Aug 2013 02:39:35 -0700 >>> wb6bnq <[email protected]> wrote: >>> >>>> I gather you did not fully read the paper ? >>> I did, but... >>> >>>> This paper presents a circuit topography that allows the low current >>>> operation at a high frequency (12.8 MHz) thus reducing complexity. This >>>> in turn allows the design and manufacture of a radio system using one >>>> crystal oscillator at a frequency of 12.8 MHz (example in the paper) >>>> with the low power advantage that previously required two oscillators. >>> That's one advantage, and not a small one, but differential oscillators >>> have been in use earlier and even in places where power consumption did >>> not matter much. It pops up in crystal oscillator designs now and then >>> but without any mention why this architecture was choosen. So i started >>> to wonder whether there was any additional advantage than just lower >>> power consumption and being able to work with less headroom, like better >>> phase noise or better long term stability or less harmonics. >> Well, at least from this paper they have not analyzed that. Here they >> only use it for it's benefits in power, which is obvious from the Abstract. >> >> If you wish to know other benefits, they need to be analyzed separately, >> which by itself might prove an interesting paper. Reducing current drawn >> should be interesting, as this should reduce 1/f noise in the feedback >> amp, which should make the 1/f^3 noise lower significantly, which should >> be beneficial for the stability of the oscillator in noise terms, >> however it might not be beneficial for the oscillator in systematic >> frequency drift terms. As always, it's a balance thing. >> >> It should not be too hard to build it, try it, measure it and learn from >> it. Sounds like fun! >> >> Cheers, >> Magnus >> _______________________________________________ >> 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.
