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−40

−30

−20

−10

0

10

20

30

40

1

1001

2001

3001

4001

5001

6001

7001

8001

9001

10001

Cycle

−25

−20

−15

−10

−5

0

5

10

15

20

25

1

1001

2001

3001

4001

5001

6001

7001

8001

9001

10001

Cycle

CDC906

SCAS828 – SEPTEMBER 2006

Figure 27. Snapshot of Cycle-to-Cycle Jitter

random sample of cycles. In reference to a PLL, period jitter is the worst-case period deviation from the ideal

that would ever occur on the PLLs outputs. This is also referred to as short-term jitter.

Figure 28. Snapshot of Period Jitter

31

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