Hi > On Jan 7, 2018, at 12:26 PM, jimlux <jim...@earthlink.net> wrote: > > On 1/7/18 8:05 AM, Arnold Tibus wrote: >> Am 07.01.2018 um 16:33 schrieb jimlux: >>> 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 -- time-nuts@febo.comgents, >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >> Hello everybody, excuse me please, >> but I see quite often mentioned the 'Wein bridge'. (Wein in german is 'vino' >> or 'wine' ;-) >> Not of real technical importance, but shouldn't this not be correctly called >> a 'Wien bridge'? >> As I know that this tricky circuit was developed by Max Wien in 1891. >> Max Karl Werner Wien was a German physicist and the director of the >> Institute of Physics at the University of Jena at that time. >> (sorry, I am a nut ;-) ) > > > > > > Ah yes. And I imagine then that the pronounciation should be in english “veen"
This time of year, it’s the word on the label right after the term Gluh. I tend to never / ever get that one right either. It always comes out Glugh …. can’t think of why :) The Wien bridge is a very “low Q” resonator approach. It will give you amazingly low distortion (low harmonics) at the same time it does pretty poor amplitude and phase noise. Bob > _______________________________________________ > 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. _______________________________________________ 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.