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...
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My Hobby Website:
Butler Oscillator Design - 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: Butler Oscillator Design Posted: Wed Aug 16,
2006 3:13 pm
Joined: Thu Aug 10, 2006 7:09 pm
I need to design a 315MHz crystal oscillator. I'll go for
a Butler Oscillator with a crystal running at 105MHz then use a tank
circuit on the collector to get the 3rd harmonic thus achieving the
needed 315MHz. My problem is that I don't know the exact math I have
to use to calculate the component values of the oscillator. I know the
circuit model and the only thing I found online was general tips on
the design. I'd appreciate any advice on how to find out the exact values
I need for this circuit.
Butler OscillatorPosted: Mon Aug 28, 2006 11:17 pm
Joined: Wed Feb 22, 2006 3:51 pm
pages 250-279 of Design of Crystal and Other Harmonic Oscillators by
Benjamin Parzen with Arthur Ballato.
It was published in 1983
by Wiley-Interscience, and is available by inter-library loan if your
library doesn't have it.
His 29 pages on a single oscillator
is pretty exhaustive and detailed.