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Oscillator
Sci.Electronics.Design is a worldwide Usenet news group that is used to discuss various aspects of Electronic Circuit Design.
We found 455 threads matching "oscillator"
You are looking at page 1 of 12.
The most relevant threads are listed first
Hoorah for the patent system
nospam - 2008-01-06 16:58:00
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...
opamp sine wave oscillator
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...Austron Oscillator Datasheet/Pinout Needed
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...Switching of crystals in crystal oscillator using a 74HC4316 ??
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...Crystal Serie VS Parallele
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...Whats different between these two circuits?
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
...XO controlled 480Hz Oscillator
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
...FOX ESPRESSO 50MHz OSCILLATOR?
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....Startable Oscillator
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...Re: EMI prevention / protection?
whit3rd - 2009-10-30 14:26:00
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...Re: Startable Oscillator
Paul Keinanen - 2009-09-09 12:59:00
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...LT Spice schmitt oscillator
John Larkin - 2009-10-08 17:46:00
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
...mc33063 current limiting
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...3.3V version of SA602?
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
Jan Panteltje - 2008-02-07 06:59:00
Silicon CMOS oscillator at 430 GHz
http://www.sys-con.com/read/497124.htm
...DPSK oscillator quality
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...Twin T Notch Filter Anomaly
Ian Bell - 2009-01-25 16:22:00
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...Re: opamp sine wave oscillator
Glen Walpert - 2008-02-07 19:56:00
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...building a sine wave oscillator
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...CD player, simple pitch/tempo control
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 ...Solid state S-band power oscillator
Spehro Pefhany - 2009-09-14 20:56:00
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...Modulation doubts
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...OT: New species found ! Sweep Oscillator Bird.
Eeyore - 2008-12-17 10:27:00
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...Re: Does not have any harmonics
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 ...Re: opamp sine wave oscillator
Jim Thompson - 2008-02-07 20:42:00
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...Colpitts Oscillator, less "universal"
Robert Baer - 2008-11-16 04:37:00
150K 120K
+-----/\/\----+-----/\/\--+--->
| | |
| | |/------+
--- +--------+---| 2N2369A
- | | |\
| C1 --- V
| 330p --- |
...Sinusoidal oscillator configuration
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....Re: External Quarzoscillator with SMA Output
Tom Bruhns - 2008-07-03 13:34:00
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 ...Re: accurate timing/clock for microcontroller? (for measuring bpm)
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.
> ...Re: Choosing ceramic capacitors
John Larkin - 2009-05-17 15:13:00
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 ...Oscillator circuit for 32.768 kHz quartz tuning fork crystal element immersed in water
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...Common base with base series resistor
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...Re: tiny inductor with every bypass cap?
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...Re: Rectify 500MHz Small Signal
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:
...Re: True random nunber generator
John Larkin - 2009-08-20 10:02:00
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...Pic 18f24j11,configuring RTCC
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
...Re: One button, two beeps
MooseFET - 2008-04-24 21:54:00
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...Op amp oscillator operating point
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...Re: Searching for Surplus Glass Piston Cap
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...Re: Metal Detector question.
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 ...