Copyright: 1996 - 2024
BSEE - KB3UON
RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling
2 MB. Its primary purpose was to provide me with ready access to commonly needed
formulas and reference material while performing my work as an RF system and circuit
design engineer. The World Wide Web (Internet) was largely an unknown entity at
the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps
while tying up your telephone line, and a nice lady's voice announced "You've Got
Mail" when a new message arrived...
All trademarks, copyrights, patents, and other rights of ownership to images
and text used on the RF Cafe website are hereby acknowledged.
My Hobby Website:
MSG and stability - RF Cafe Forums
RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media
platforms dominating public commenting venues. RF Cafe Forums began sometime around
August of 2003 and was quite well-attended for many years. By 2010, Facebook and
Twitter were overwhelmingly dominating online personal interaction, and RF Cafe
Forums activity dropped off precipitously. If the folks at
phpBB would release a version with integrated
sign-in from the major social media platforms, I would resurrect the RF Cafe Forums,
but until then it is probably not worth the effort. Regardless, there are still
lots of great posts in the archive that ware worth looking at.
Below are the old forum threads, including responses to the original posts.
|-- Amateur Radio
Gripes & Humor
-- CAE, CAD, &
Test & Measurement
Post subject: MSG and stability Posted: Sun Feb 12, 2006
Joined: Thu Feb 09, 2006 5:29 am
My transistor is the NE4210S01, bias point
VDS = 2 V, ID = 10 mA and at 6 GHz.
I'm doing an availabe gain
(Ga) design, keeping my load complex conj of the output reflection,
and draw the constant gain circles in the GammaS plane:
that the gain circle corresponding to the MSG has some parts inside
the stable region. Picking values of GammaS so that I have higher gain
than the MSG, I get some GammaL according to the perfect match at the
output - and this is also in the stable region! So I have stability
both at the input and the output, even though choosing points on having
higher gain than the MSG!
Can this be, and if so - why oh why?
me a job!