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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 , ~1 s9 x& v1 L& h" z: @) S5 {
5 V, K; E3 ^+ b; {( r4 k) J8 lRelation of jitter type material~~
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5 P& R _: c! U3 X8 aJitter can be defined as the deviations in a clock’s output transition
( e4 p3 k9 J, g) r2 i7 p( tfrom their ideal positions. The deviation can either be leading or
3 v5 i4 `* z: ^, a& {1 D5 ulagging the ideal position. Jitter is usually specified in ± pico seconds.
% F: D$ [# Q& C3 u) z& e0 TJitter measurements can be classified into three categories:0 m& s$ m) G3 E3 H( ^6 z) @
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
& X* p4 C) \$ d, ~are at a specified voltage, usually Vcc/2 or 1.5V.; N' R, ~$ b* g; v' _, W4 {
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