In the last issue of " About Jitter, " we discussed Cycle-to-Cycle Jitter and Period Jitter.
So, why should we pay attention to Jitter in the first place?
At first I thought, "It's just a slight change in measurement method, so it doesn't matter which one you use..." (laughs).
So this time, I will explain the difference between Cycle-to-Cycle Jitter and Period Jitter.
For example, when the rising edge of the clock is used for sampling analog audio data, the sampling interval varies a little depending on the Jitter.
Large deviations in the sampling interval create the possibility that the data will not be sampled correctly.
In this case, if we pay attention to the Cycle-to-Cycle Jitter value, the following would happen if the cycle were to increase slightly.
Therefore, in this case, we must pay attention to Period Jitter instead of Cycle-to-Cycle Jitter.
If we do not evaluate the Jitter that we should pay attention to, it can happen as in this example.
In addition, since data transmission speeds have increased significantly in recent years, even more attention should be paid to Jitter.
We must also be careful about the type of Jitter to be evaluated.
In the case of AD conversion, it is the Period Jitter that should be considered here, since it is compared to the ideal sampling width.
I like noisy rock sounds, but if the sound is too jumpy, I get excited.
I still have a lot to learn, but I will do my best to become more familiar with Jitter so that I can introduce the best clock device for our customers!
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