It is a Wien bridge.... Sent from my iPhone
> On Jan 7, 2018, at 10:33 AM, jimlux <[email protected]> wrote: > >> On 1/6/18 6:12 PM, Dana Whitlow wrote: >> One point about oscillator design I've not yet seen mentioned is this: the >> limiter >> must not degrade the resonator Q when in action. Hence, a pair of diodes >> connected in parallel back to back, across a shunt resonator, would be a bad >> thing to do from the perspective of low phase noise. A differential >> amplifier >> that limits by running out of current on peaks, driving a shunt resonator, >> is >> a much better way even though one pays a price in having more transistor >> noise in the circuit. >> I've long wondered if a very slow AGC might avoid the nonlinear mechanisms >> issue except, of course, for things happening within the AGC loop's >> bandwidth. > > > That's the Wein bridge stabilized by a light bulb, popularized by Messrs > Hewlett and Packard a while ago. > _______________________________________________ > 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.
