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:
pls help....thanx - 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: pls help....thanx
Unread postPosted: Thu
Jun 09, 2005 4:21 pm
I am a beginner in filter
design, pls help.
I am designing a butterworth bandpass filter using
capacitively coupled resonator.
i using 2 resonators,
1 input coupling capacitor C1,
1 output coupling
Is it the the capacitors in the two resonators
same value? which is
Co- C12- C1 = Co- C12- C2 ??
pls give some advices. Thanx a lot.
Unread postPosted: Fri Jun 10, 2005 12:06 am
Anyone pls help me...i am near the end of the road now...pls...
Post subject: Band-pass filter
Unread postPosted: Fri Jun 10, 2005 12:53 am
In general, the
shape of the curve varies with the value of C12. Its value depends on
the loaded Q of the two resonators.