High Performance Oscillator Search

[engr_joni_ee]

Hi,

I am looking for high performance oscillator, XO or VCXO type.

I am wondering which value is better for the parameters like stability (PPM) and phase jitter, lower or higher ?

 

[danadakk]

The question is pretty broad.

You can always go to https://www.digikey.com/products/en...sonators/oscillators/172?k=oscillator crystal

and set filters for type. and screen for parameters to get an idea of what is avialable.


Regards, Dana.

 

[BigBoss]

What type of "high performance" you're looking for ??
-Short/Long Term Frequency Stability
-Temperature Compensated
-Low Phase Noise
-High Output Power
-Low Aging
-Low Sensitivity against Load Variations
-Low Sensitivity against Supply Variations
-Reliability
There are some criterias to be considered first while choosing an oscillator.

 

[engr_joni_ee]

Hi,

I would like to know the basic difference difference between XO or VCXO type oscillator.

Which value is better for the parameters, stability (PPM) and phase jitter ? lower or higher

 

[FvM]

Which value is better for the parameters, stability (PPM) and phase jitter ? lower or higher

To answer the question yourself, imagine that a perfect oscillator has zero drift and zero jitter.

The first question is well answered by Wikipedia and many other internet sources. XO = crystal oscialltor VXCO voltage controlled crystal oscillator
XO is fixed frequency, VCXO is tuneable by a small frequency amount, certainly larger than the frequency tolerance, but possibly not much more. It can be e.g. used to frequency lock an oscillator to an external reference signal by means of a PLL circuit.

 

[engr_joni_ee]

Hi,

I just have learned little more about the frequency stability. I guess XO oscillators are more stable and have low jitter compared to VXCO.

In numbers 25 ppm is better and more stable then 50 ppm. Similarly, when it comes to phase jitter, either random or deterministic, the lower value of phase jitter is better.

What is the difference between deterministic and random jitter ?

I also have noticed by looking at the datasheet of one oscillators that phase jitter for oscillators with 3.3 V is smaller than those oscillators with 2.5 V. Is that true for other oscillators in general that high output power leads to low jitter ?