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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 ! H/ ~4 v) ?. N
. t9 S$ j6 O* U. nRelation of jitter type material~~
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+ p8 p- u6 d* J: ?) u0 c- UJitter can be defined as the deviations in a clock’s output transition" }0 E4 e* [- Q' b
from their ideal positions. The deviation can either be leading or
0 F w' s/ H: a' K" x& s" Ulagging the ideal position. Jitter is usually specified in ± pico seconds.
8 L2 s# G% [' J% S nJitter measurements can be classified into three categories:+ v1 l8 }# o4 l0 I5 S* N- N
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements, v2 Y) `! M3 X7 k! s% t7 q8 e
are at a specified voltage, usually Vcc/2 or 1.5V.
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