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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯
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Relation of jitter type material~~% ~4 E+ S) M+ o+ k+ a1 p
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Jitter can be defined as the deviations in a clock’s output transition7 U, ^3 [8 X$ c9 h0 ^2 p5 V
from their ideal positions. The deviation can either be leading or/ Y0 e. c* F' p6 d4 G( O6 R
lagging the ideal position. Jitter is usually specified in ± pico seconds.+ s& R- e1 d/ u/ X% k: I
Jitter measurements can be classified into three categories:
+ p" w' `9 ~: o5 o- T0 S2 q' hcycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
9 a" M- `4 v1 O9 o' Uare at a specified voltage, usually Vcc/2 or 1.5V.
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