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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯
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' e9 v: N7 h/ E, h% D! N: ^& cRelation of jitter type material~~
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' u; D! W% u( D( K, |- mJitter can be defined as the deviations in a clock’s output transition* Z" `% p; \- S
from their ideal positions. The deviation can either be leading or
4 V! b2 D U' c2 T' E0 p) [4 |& S# G9 clagging the ideal position. Jitter is usually specified in ± pico seconds.
0 V( \. p- _% _3 @9 Y: B: NJitter measurements can be classified into three categories:6 K3 ?, J1 u0 j9 K y' {
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
( Y0 ^5 r( t* [$ ^) r# }are at a specified voltage, usually Vcc/2 or 1.5V.% [* m4 }9 K& [7 k
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