Oscillator
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I stumbled across this United States Patent 7236062 granted to Broadcom
last year
1. A method for reducing noise in a circuit, the method
comprising:
receiving a first voltage at a positive potential input of an
oscillator circuit comprising an oscillator core and a
buffer coupled to an outp...
Inventor - 2008-02-04 17:32:00
Hi, hope I'm posting to the right place. I created a nifty little
sine wave oscillator. I have no plans to patent it just want to tell
the world about it cause I think it's pretty cool. You can download
the pdf file here:
http://www.freedomodds.com/osc/
I like it for lots of reasons, but...
Jim Flanagan - 2009-04-20 06:13:00
I am searching (for some time now) for data on an
Austron Oscillator model #1630-2R (10 MHz).
This oscillator has a an octal base and requires
+12V for the osc and +26V for the oven.
The osc case shows a NAVAIR part # 247AS-C0393-001.
I've had no luck searching for either of these numbers...
sparks - 2009-03-11 16:17:00
Hi,
Ive got a radio that has rotary switch selection of crystals for the
1st local oscillator.
I want to have electronic selection, where I can change the crystal
selected by use of control lines.
Can I use something like the 74HC4316 to do this without stuffing up
the capacitance of the oscil...
Jacques St-Pierre - 2008-03-20 08:33:00
Hi,
Anyone can explain to me the difference in configuration require for a serie
or parallel crystal pierce oscillator. I wish to use a SB74LVC1404 chip to
build a oscillator using a 3.000Mhz crystal. The application sheet use a
parallel load crystal, but the only 3Mhz crystal I can found i...
readeraz - 2008-07-23 19:04:00
Ringing choke circuit and blocking oscillator are different names of
oscillator.
Are they same meaning or they are different circuit in practice?
How to distinctly identify them?
thanks
...
Chris - 2010-02-02 11:29:00
What is the simplest way to get 480Hz from a crystal controlled
oscillator? Looks like most of the pre-packaged XO's and VCXO, seem
to put out much higher frequencies. Would a series of dividers be the
best way?
Thanks,
Chris KQ6UP
...
Hammy - 2009-11-12 22:38:00
I don't know if I'm pulling a mind fart are not but….
I'm using a FXO-HC736R-50.000 which is a 50MHz OSCILLATOR.
The data sheet says the output swing should be 10% Vdd to 90%Vdd.
I've tried one in my AD9834 DDS circuit it's the master clock and it's
only swinging 1.3Vpp on a 2V dc offset....
Kolja - 2009-09-06 04:36:00
Hi,
I need an oscillator circuit that starts immediately with a known
startup delay from an enable signal.
Frequency stability should be below 1% over roughly 10ns, so it does
not need to be very stable.
The frequency is in the range of a few GHz.
I would be happy to discuss the design her...
On Oct 30, 7:43=A0am, "dave.harper" wrote:
> I'm using a wein bridge oscillator as an audio tone generator in a
> radio modem (~2kHz). =A0Ironically, when the transmitter is turned on,
> RF from the transmitter (~144MHz) causes the oscillations to die
> pretty quickly (a fraction of a sec...
On Wed, 9 Sep 2009 01:29:11 -0700 (PDT), Kolja
wrote:
>
> Not actually minimum delay, but a very precise delay. I assume that precise
> delays are easier to achieve for small delays, but we can handle any
> delay as long as it is well known.
>
> All edges of the oszillation must occure...
Does anybody have a working LT Spice netlist for a simple schmitt
inverter/R-C oscillator? I tried one using the library schmitt
inverter and get obscure sim errors, and I don't understand the HELP
stuff.
What's the third pin in the corner for? Ground?
Thanks,
John
...
Michael Robinson - 2010-01-05 20:54:00
How does the current limiting work in the MC33063. The datasheet doesn't
explain the actual mechanism.
http://www.onsemi.com/pub_link/Collateral/MC34063A-D.PDF
Does it discharge the timing cap when it detects overcurrent, which would
restart the oscillator, or does it let the oscillator keep...
Joel Koltner - 2007-12-21 21:13:00
I posted this over in rec.radio.amateur.homebrew awhile back and didn't get
any responses. Perhaps someone here knows?
Anyone know of a replacement for the venerable SA602 oscillator/mixer that'll
work down to 3.3V?
I know that NXP has complete FM IF subsystems (e.g., the SA607) that work ...
Silicon CMOS oscillator at 430 GHz
http://www.sys-con.com/read/497124.htm
...
Henry Kiefer - 2007-12-29 14:00:00
Hi folks!
At the moment I'm designing a DPSK transmission system. The question is
how much bit-error-rate I get dependent on the actual difference of
oscillator frequency =f(transmitter)-f(receiver).
I'm using a costas-loop demodulator. I think this is one of the best
algorithms/strategi...
I have built a 2KHz twin T notch filter to help measure low level
distortion harmonics in audio equipment by removing the fundamental
(2KHz). It uses 510pF (1%)capacitors 150K (0.1%) resistors in a standard
bridged T configuration. However a strange thing has happened. I have
measured the no...
On Thu, 07 Feb 2008 17:51:38 -0500, John Popelish
wrote:
> Winfield Hill wrote:
> > John Larkin wrote:
> > > I'd imagine that most capacitors add distortion, too.
> >
> > Our 2ppm may well be coming from the caps.
>
> Down at 2ppm, I would start worrying about resistor
> linear...
Joe - 2008-03-05 19:08:00
Hello to the group,
I am looking for some ideas on how to build a 24khz sine wave
generator to drive an ultrasonic piezo transducer.
Or, if someone knows of a way that I can change a square wave from a
555 to a sine wave, that would work too.
I have googled and found something called a wi...
philip - 2008-02-21 16:50:00
I want to be able to change the pitch and/or tempo of music played on
a CD player. This used to be a fairly common facility with some cheap
CD players but is now difficult to find. Does anybody know how to do
this in a simple way? I wondered if the crystal oscillator in the CD
control circuitry ...
What do you folks think is the best efficiency that can practically be
achieved (DC-microwave) in a solid state (not magnetron) S-band power
oscillator, say 50 - 150W output?
Best regards,
Spehro Pefhany
--
"it's the network..." "The Journey is the reward"
s...
Nimo - 2009-05-16 00:18:00
Hi engineer..,
well, I think my question will be most basic to you
yet I need your help :-)
Modulation:-
(a) Freuency
(b) Amplitude
well, I don't have any problem with frequency modulation
because from an electronic Oscillator we can produce frequncies
depending upon our requirements...
I was just recovering from a ghastly migraine, the first bad one I've
had in decades, when I heard this strange noise. I thought it might be
my hearing but no, there it was again.
A bird in the garden was making a noise like a sweep oscillator. I'd
guess it started at ~300Hz and swept up to 3k...
Phil Hobbs - 2008-02-24 02:40:00
Robert Baer wrote:
> Phil Hobbs wrote:
>
> > So it isn't just a matter of definition--exponential functions,
> > including sines and cosines, really are fundamental to a wide range of
> > physical processes. Another way of saying this is that just about all
> > the equations of ...
On Fri, 08 Feb 2008 00:56:16 GMT, Glen Walpert
wrote:
> On Thu, 07 Feb 2008 17:51:38 -0500, John Popelish
> wrote:
>
> > Winfield Hill wrote:
> > > John Larkin wrote:
> > > > I'd imagine that most capacitors add distortion, too.
> > >
> > > Our 2ppm may well be coming from th...
150K 120K
+-----/\/\----+-----/\/\--+--->
| | |
| | |/------+
--- +--------+---| 2N2369A
- | | |\
| C1 --- V
| 330p --- |
...
Nick Zalutskiy - 2008-08-24 20:42:00
I am looking for a minimal hardware circuit to generate a 125 kHz
sinusoidal wave to be fed into the power stage that is in turn feeding
an antenna. The wave is used to generate a carrier frequency for an
RFID application.
I was thinking of using this [ http://www.ecsxtal.com/store/pdf/ecs-31....
On Jul 3, 9:56 am, Rob Berger wrote:
> Hi
>
> I am currently looking for an external quarzoscillator that can be used
> to clock a chip. The chip has a SMA socket, so I would need in some way
> an oscialltor that could be connected to this SMA socket. The frequency
> I am looking for ...
Bob Monsen - 2008-03-11 11:46:00
wrote in message
news:9c27d683-95c3-4c38-b4b7-fd8b46ca2660@n36g2000hse.googlegroups.com...
> I would like to build a drum machine/metronome
> using a BASIC Stamp 2 (maybe later on PICAXE)
> which would allow the user to control
> the beats per minute (bpm) with a dial/potentiometer.
> ...
On Sun, 17 May 2009 11:28:45 -0700 (PDT), osr@uakron.edu wrote:
> Ok, opposite question, whats the WORST dielectric with respect to
> applied voltage, A idea for a VCXO comes to mind.
>
> Steve Roberts
You could make all sorts of fun stuff from nonlinear ceramic caps...
VCO
Parametric ...
Steve - 2009-02-18 12:58:00
It is possible for the tuning fork element of a 32.768 kHz quartz
crystal to be used in an oscillator circuit if the element has been
exposed from its case and immersed in water ? Or is its Q factor now
too low ? The element exposed to air will produce slightly higher
frequencies than 32.768 k...
Andrew Holme - 2010-02-08 15:36:00
One often sees a small resistor (e.g. 22 - 100 ohms) inserted in series with
the base in VHF/UHF/Microwave common base amplifier circuits. I believe
this aids stability but I don't understand how it works. I'd be grateful if
someone could explain.
I'm building an 80 MHz crystal oscillator...
Joel Koltner - 2008-06-23 16:32:00
"Vladimir Vassilevsky" wrote in message
news:7kT7k.2479$LG4.426@nlpi065.nbdc.sbc.com...
> Analog Devices ADUCxxxx series.
Thanks, I'll take a look; always interesting to see what else is out there.
> The good thing about AVR is that it is possible to use the external
> reference, an...
2009-09-30 21:50:00
I've had fun with two hobbyist concepts:
The Lambda Diode:
http://users.tpg.com.au/users/ldbutler/NegResDipMeter.htm
http://www.zen22142.zen.co.uk/Theory/neg_resistance/Oscillations%20and%20Regenerative%20Amplification%20using%20Negative%20Resistance%20Devices.pdf
The psuedo PUT:
...
On Thu, 20 Aug 2009 15:23:26 +0200, "BarNash"
wrote:
> Hi all
>
> Is there a way to implement a true random number generator with logic gates
> ,nand nor FF etc without using white noise from a zener diode for example?
>
> Thanks
> BarNash
>
Some all-digital chips make a bunch o...
blisca - 2009-10-21 10:19:00
Please,can someone show me how to configure to have the
RealTimeClockCalendar running using the internal RC oscillator?Of course
this is not the top about precision,but i need that
thanks
Diego
Italy
...
On Apr 23, 7:06 am, _
wrote:
> Well, not beeps really, flashes.
>
> I want a button on the car dash that I can hit that will flash both sets of
> turn signals twice. A thank-you button. Hit the button once, get two
> flashes. I don't think the simplest solution is to count the flash...
Stephen-I-am - 2008-07-24 15:13:00
I simulated this op amp oscillator with LTSPICE but was a bit
surprised that the output was a square wave rather than a sinusoid. It
is a dual supply op amp with 3 RC networks between the output and the
inverting terminal.
To make it I simulated the RC network cascade and saw where the
transf...
DaveM - 2008-01-21 21:01:00
I don't have a direct replacement, but I do have a few (used, carefully
salvaged) Johanson 5501 air variables. The data sheet is at
http://www.johansonmfg.com/Catalog/Air%20Capacitor.pdf so you can verify
suitability for your oscillator. It's a 1-20 pf unit, not quite the 1-30 pf
range th...
Larry Snyder - 2008-02-27 02:40:00
"sycochkn" wrote in message
news:13s9vf22rl5ft51@corp.supernews.com...
>
> "Larry Snyder" wrote in message
> news:13s9dk7tljsft5a@corp.supernews.com...
> > I'm getting into metal detectors again and was wondering if I missed
> > something. Here's what I have so far:
> > Dual ...
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