Crystal oscillator frequency pulling
Вставка
- Опубліковано 11 лип 2024
- This video briefly explains how to influence a crystal oscillator's frequency by introducing reactive elements such as trim capacitors and inductors. This example uses a very simplistic Pierce oscillator and a crystal ins series resonance.
Support My Work:
▸PayPal: paypal.me/BalticLab
▸Join this channel to get access to perks: / balticlab
▸Amazon Wishlist: www.amazon.de/hz/wishlist/ls/...
▸Visit my Blog: baltic-lab.com
German Content
▸My German Channel: @balticlabor
▸Text Blog: baltic-labor.de
Social Media:
▸ / balticlabde - Наука та технологія
Thank you for posting, I made this and once I powered it up, it has no problem being picked up with my RTL-SDR
Very serious stuff! Nice video. Thanks for sharing. Subscribed.
I loved this! Seriously!
ha ha love it, if it doesn't work in serious you could try paralyse
Subscribed, found your site via W2AEW. Great to see RF related content! Really liked your L - network expedience matching video, hoping to see your take on T, pi, etc., networks. Anything RF! Well done!
Thank you so much for the video! Tons of help.
Thanks, just found your channel via W2aw (?) going to have a play with crystall resonator circuits ( back into this hobby after many years absence). Cheers.
finally i'm starting to understand oscillators, yes, capacitance in series reduce and thus according to oscillation freq equation, the freq will increase, but in parallel the tank circuit capacitance increase and thus freq will reduce.
Very interesting video sebastian.
I'm glad you enjoyed the video. More to come shortly :)
Great video thankyou
Thanks mate. This info has been hard to find. Much appreciated. Would be better with a circuit diagram showing the different circuits you made. Thanks again.
A circuit diagram drawn on the white sheet as you go would really help.
KF5OBS would I take a battery, hook it up in series with the crystal, then feed it to an amplifier and somehow put an antenna on the amplifier to transmit the signal?
Very good ❤❤❤
Outstanding explanation. One small point - If a parallel cap. decreases resonance, and a series cap. increases resonance, instead on using an inductor in series with a cap. why not use a parallel cap across the series cap. Could this arrangment also enable tuning above and below the resonant frequency? Thank you so much.
which transistor you use? work with 32.768khz crystal? Thanks
where could I find this circuit?
You should do a whole serious on the subject :D
childish considering this is probably not his first language. What's your third language?
It was C, but I said a whole serious on the subject, not a string of series charges.
Sorry to have to admit it, but I was going to make a VERY similar comment myself! Seri... Ooops, HONESTLY!
We're so lucky that there was no frivolous reactance in the oscillator!
(If ya can't have a bit of a laugh every now and then [even a laugh at yourself], then you're being far too... well... serious!)
P.S.
Good video KF5OBS! Keep up the good work dude!
I guess Im kind of off topic but does anybody know a good site to watch new series online?
@Marcellus Eli i watch on Flixzone. Just search on google for it =)
So, the phenomenon says that: if the output impedance of the circuit changes, the frequency of the oscillator will change. Right?
thank you for this video :)
can you please share the schematics
hi
In your schematics, the output is fed to the input that's all right to make oscillation possible,but normally, the output must be in phase with input otherwise it would be a negative feedback.In the schematic the output is shifted by 180 degrees in respect to the base or am i wrong?????
Do you have circuit schematics?
Let's put a smile on that face.
So how some circuit archive for example 900MHz or 5GHz frequency?
That would be a completely different kind of technology, mostly fractional N PLL circuits.
09:24
why so serious?
can any one give me the transistor and rf output dbi on this
Sir how to use crystal in radio receiver circuit
Build a superheterodyne receiver in which the local oscillator uses a crystal. The local oscillator's frequency output should be slightly higher than the desired reception frequency so that the difference frequency from the mixer is allowed through the low pass filter and then demodulate it.
My 4.9512 MHz Crystal datasheet has following data mentioned in it
Shunt Capacitance C0, Drive Level ,Equivalent Series Resistance ESR Table
Load Capacitance CL => Range 8pF - 32 pF
My 4.9512 MHz Crystal datasheet has following data mentioned in it
Shunt Capacitance C0, Drive Level ,Equivalent Series Resistance ESR Table
Load Capacitance CL => Range 8pF - 32 pF
I am trying to Calculate Parallel capacitors neede for 4.9512 MHz
C = 2(CL - C_Stray - C_pin)
What value should i consider from the range of CL ( 8 - 32 pF)
www.comkey.in/sites/default/files/attachments/NXE4.9152AC20F-AHF.pdf
HOW COULD I USE 13.8 VOLTS TO POWER THIS
jonneil smyth 13.8 should be fine in this Circuit
and last questions please can i use higher frequenceys say 40 mhz and will the 2n222 still work up there
jonneil smyth The 2N2222 will Work just fine at 40 MHz. But Note that you will have to use a fundamental Mode Crystal. Some Crystals 30 MHz or higher are overtone Mode Crystals
Shopping list.
It's series not serious.