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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 - ~! |4 ~5 G8 N5 x
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Relation of jitter type material~~4 [; X4 v0 Y' R; Q5 x
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Jitter can be defined as the deviations in a clock’s output transition/ t& F9 q' e- T9 x# M6 Y
from their ideal positions. The deviation can either be leading or" k0 W0 F: v2 B) p' p; K+ f* D
lagging the ideal position. Jitter is usually specified in ± pico seconds.
/ K# @2 a. W1 ]8 W. t0 @Jitter measurements can be classified into three categories:6 K- x9 V8 E7 j2 S5 f4 G
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
: b1 L P$ l2 A4 }are at a specified voltage, usually Vcc/2 or 1.5V.( i z6 r( x( u1 N ~
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