Can you tell me the differences and similarities among Crystals vs Oscillators vs Resonators? In term of:
Why we have Oscillator Type (OCXO, SPXO, TCVCXO, TCXO) but the other two don't have the Type?
Thanks
Ref:
Because the other two aren't "oscillators". Both crystals and resonators need extra circuitry added to them to make them oscillate. That extra circuitry can affect the frequency accuracy and stability. Oscillator modules like OCXO, DTCXO etc are fully self contained modules that you can just drop into your design. They will have their own frequency accuracy and stability spec that is (generally) not reliant upon your external circuit.
Crystals and Resonators do have "types" and accuracy grades too. e.g. Series resonant 50ppm crystal, 20ppm Parallel resonant crystal.
Resonators are (generally) cheaper than crystals and aren't as accurate. Dave :)
So do you think there is any physical property or electrical property that Oscillator has but other two don't?
For example
Crystal
Oscillators
Resonators
As you see, the bullet points show different attributes. For instant, I don't see Impedance in all 3 of them. So does it mean Impedance is not important to some? What else missing?
Thanks.
David L. J> > Can you tell me the differences and similarities among Crystals vs
You really should consider getting a basic electronics textbook, and just learning the things you need to know.
A salesperson friend of mine happened to luck into a good sales job at an electronics firm, but unfortunately didn't know beans about electronics. He made a resolution to really learn at least five completely new things about electronics every day, and went to the libraries for fuel. After he went through the local library resources, he started in at the local junior college. In a year or so, he was their best salesperson.
He never would have gotten there unless he took it upon himself to learn -- if he just depended upon the "kindnesses of strangers", they would have booted him for sure.
Start out with trade school basic electronics texts like he did -- there are hundreds to choose from. Either that, or you might want to consider a new career.
Good luck Chris
The oscillator has its own internal circuitry, while crystals and resonators are just frequency-determining components, that need the oscillator circuitry built around them.
And please bottom-post.
Good Luck! Rich
What is missing is your grasp of the difference between a complete oscillator module and a single component. As I explained, an oscillator module has a complete oscillator circuit built around, apply power and it oscillates. It has a complete self contained function, so it has it's own unique specifications to meet that purpose.
A crystal or resonator is *not* the same thing, it is just a single component that needs the extra circuitry you provide. It will do nothing on it's own, so it has a different range of specifications to match.
Clearer?
Dave :)
-- Do you know how to use Google to do anything but top post?
There is no definition of top-post and bottom-post in Google. I saw everything in order I posted. Why don't we just ignore this because it is not in scope of the discussion?
John Fields wrote:
Crap. A search for 'bottom-post' on Google brings up relevant pages:
You can read this from Google's help pages too:
The bit under "Summarize what you're following up." is particularly pertinent.
Tim
--- Proper posting is _always_ in the scope of the discussion, so you're wrong on both counts. From:
"Summarize what you're following up.
When you click "Reply" under "show options" to follow up an existing article, Google Groups includes the full article in quotes, with the cursor at the top of the article. Tempting though it is to just start typing your message, please STOP and do two things first. Look at the quoted text and remove parts that are irrelevant. Then, go to the BOTTOM of the article and start typing there. Doing this makes it much easier for your readers to get through your post. They'll have a reminder of the relevant text before your comment, but won't have to re-read the entire article. And if your reply appears on a site before the original article does, they'll get the gist of what you're talking about."
In other words, trim the post you're replying to to get rid of what's not necessary and then place your reply at the bottom of the post you're replying to. That's the custom here, so it would create a lot less friction if you did it like the rest of us do.
As far as the technical part of the thread goes, all of the acronyms you're asking about are explained in excruciating detail in links you can get to by invoking Google, then typing, say, "OCXO" in the dialogue box and then clicking on "Search" or just hitting the ENTER key on your keyboard.
No one here, I'm sure, minds answering most questions, (this is, after all, sci.electronics.basics, where there are no stupid questions) but I know that I think it's a querant's responsibility to do his own legwork.
So go to Google, type in OCXO, SPXO, TCVCXO, and TCXO, and then from the hits you get, which you should explore, you should be able to figure out, "What are some differences among them? Let say functionality, physical, electrical?" all by yourself. If not, come back with some questions which show that you've done a little work for yourself, for goodness' sake, and I'm sure you'll get some help.
-- John Fields Professional Circuit Designer
It doesn't matter what you see, you are asking people for help and what they see matters.
And for us, bottom posting matters, since then your reply makes more sense, since we know what you are responding to.
And, don't sidestep the issue.
You could put all of those oscillator types in a search engine, and you'd find out their meaning.
Michael
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