Also a good paper:
Phase Noise Reduction in Microwave Oscillators
Alexander Chenakin, Phase Matrix Inc., San Jose, CA
<http://www.microwavejournal.com/authors/1981-alexander-chenakin-phase-matrix-inc-san-jose-ca>
http://www.microwavejournal.com/articles/8625-phase-noise-reduction-in-microwave-oscillators?v=preview
73
Alex
On 7/19/2015 8:00 AM, Azelio Boriani wrote:
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&context=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
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