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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 + _1 {# d5 D: Z' ?) p) F1 U& @
: }; j6 |$ ~( IRelation of jitter type material~~
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& T. ^- S F7 ~$ J& NJitter can be defined as the deviations in a clock’s output transition) g- V( }5 R" d4 ]% g, H
from their ideal positions. The deviation can either be leading or' C$ C$ e& b) g+ [9 d% Y; w5 m: c
lagging the ideal position. Jitter is usually specified in ± pico seconds.
4 e7 t% ]& ~2 K( ]Jitter measurements can be classified into three categories:' m5 a6 p8 S! F5 A& A. K% L8 F
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
# ]+ ~4 [( i; x9 W5 @3 {are at a specified voltage, usually Vcc/2 or 1.5V.
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