I simply do not belief 5E-15 ..... Ulrich In a message dated 7/19/2015 7:12:05 P.M. Eastern Daylight Time, azelio.bori...@gmail.com writes:
Yes, I'm with Bob Pease: the soldering iron is my best simulation tool. Nonetheless it is useful to know how to correctly extract the coefficients to use in the best known among the simulation tools. In one sci.electronics.design discussion, A. Lakovlev tells to have determined the KF based on the datasheet's NF by trials and then adjusted AF to follow the datasheet's NF variation with the collector current. He ended up with KF= 5E-15 and AF= 1.13 for the 2SC3329, also in this case the AF is greater than 1. On Sun, Jul 19, 2015 at 4:41 PM, <ka2...@aol.com> wrote: > For HF to uW oscillators if find these modeling efforts not adequate . Only > a test circuit will show the prove... > > Ulrich N1UL > > In a message dated 7/19/2015 10:36:10 A.M. Eastern Daylight Time, > azelio.bori...@gmail.com writes: > > For a method to extract AF and KF try this: > <http://joerg-berkner.de/Fachartikel/pdf/2000_AKB_Berkner_1f_noise.pdf> > > see also > <http://scholarcommons.usf.edu/cgi/viewcontent.cgi?article=2270&cont ext=etd> > from page 55, on the parameter extraction for the BJTs > > usually AF is greater than 1, as you can see in this appnote from CEL: > <http://www.cel.com/pdf/appnotes/an1026.pdf> > > A SILVACO appnote on how to model for SPICE2 for 1/f (from page 45): > <http://www.silvaco.com/content/kbase/noise_modeling.pdf> > > On Sun, Jul 19, 2015 at 4:59 AM, John Miles <j...@miles.io> wrote: >> >>> -----Original Message----- >>> From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of KA2WEU-- >>> - via time-nuts >>> Sent: Saturday, July 18, 2015 3:40 PM >>> To: time-nuts@febo.com >>> Cc: akpod...@synergymwave.com; alexander.r...@rohde-schwarz.com >>> Subject: Re: [time-nuts] how to find low noise transistors >>> >>> BFG540 >>> >>> >> >> That's what I mean -- both BFG540 and BFG591 have been discontinued by >> NXP. Guess they don't sell enough of them these days. >> >> -- john, KE5FX >> Miles Design LLC >> >> >> _______________________________________________ >> 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. _______________________________________________ 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.
