Clock jitter

1. What is a jitter in a clock?
2. What is clock jitter and its types?
3. What is clock skew and clock jitter?
4. How is clock jitter calculated?

What is a jitter in a clock?

1. Introduction. Jitter is the timing variations of a set of signal edges from their ideal values. Jitters in clock signals are typically caused by noise or other disturbances in the system.

What is clock jitter and its types?

Clock jitter is a characteristic of the clock source and the clock signal environment. It can be defined as “deviation of a clock edge from its ideal location.” Clock jitter is typically caused by clock generator circuitry, noise, power supply variations, interference from nearby circuitry etc.

What is clock skew and clock jitter?

▪ Clock skew. – Spatial variation in temporally equivalent clock edges; deterministic + random, tSK. ▪ Clock jitter. – Temporal variations in consecutive edges of the clock signal; modulation + random. noise.

How is clock jitter calculated?

To measure clock jitter as a variation in period, we measure the time interval between each consecutive rising edge at the same crossing threshold over multiple cycles.