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:
VCO - 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: VCO Posted: Sun Dec 30, 2007 5:06 am
Joined: Tue May 02, 2006 4:59 am
Does anyone have a good application for VCO design at ~2GHz ?
Post subject: Posted: Thu Jan 03, 2008
Joined: Thu Sep 25, 2003 1:19 am
Post subject: Posted: Fri Jan 04, 2008 11:27 am
Joined: Fri Feb 17, 2006 12:07 pm
If you mean is there a good application for a
VCO the smartass answer is yes: an oscillator where the frequency is
Did you mean "do we know of any design application
notes to help design these", then about the best source of articles
I know of is by Ulrike Rohde.
If you google his name then it should
biff back some good papers he has written.
He now runs a US company
making a wide range of integrated assemblies for mixers amps and VCOs.
So he has found another good application for VCOs: making money.
All power to his elbow (as we say over here). I thought the days of
successful microwave companies run by excellent microwave engineers
had long passed.
Post subject: Posted:
Fri Jan 04, 2008 12:44 pm
Joined: Thu Sep
25, 2003 1:19 am
I thought your VCO was so good people would create application
just to use it.
More power to your thumb knukle I always say...here....in
my cubicle...all alone....with my empty rfcafe coffee cup...the sound
of engineers laughing at me...
You could always try Skyworks
for some app notes.
Posted: Mon Jan 07, 2008 5:27 am
Fri Feb 17, 2006 12:07 pm
Location: London UK
The company I was trying to remember is Synergy Microwave.
They have design app notes on their website at synergymwave.com.
Hey Yendori: I should be so lucky. My colleagues laugh at me
because one of them stole my RFCafe mug. How about that. I knew the
mugs were valuable but I never imagined someone would stoop to stealing
Post subject: Posted: Wed Jan
09, 2008 1:36 pm
Joined: Thu Sep 25, 2003
I understand about the coffee mug problem. The thing is it's more than
a coffee cup, it tells the world that "I know Kirt Blattenberger!"
Engineers sit in a circle in the lab while I tell stories about
Kirt. I say his website has more links than grains of sand on the beach
and although he is only 5 feet tall he can squat 600lbs. Kirt is a very
handsome man yet he still felt it neccessary to PhotoShop out some blemishes
on his home page picture. Kirt makes a mean glass of lemonade.
Then everybody takes a sip of non fat milk from the RFCafe mug and
gets back to there Spectrum Analyzers with envious, but satified grins
on there faces.
Sorry Nubbage, I need a vacation