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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 # Q6 G! n0 {2 y( O( I$ R0 S3 Z
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Relation of jitter type material~~+ \: s# r8 s" Q( Q& L
4 b( S |! ^, r6 nJitter can be defined as the deviations in a clock’s output transition
% L9 n4 K4 N) p% ]& ]" b J9 M- j8 a; Efrom their ideal positions. The deviation can either be leading or
8 q5 k& N7 q& q2 H9 ?lagging the ideal position. Jitter is usually specified in ± pico seconds.
$ O' }9 }% t* o* {- }% R& s- XJitter measurements can be classified into three categories:8 w' ^2 I* F# J9 ]$ j
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements3 U) k" q# Z; h3 T5 _5 B
are at a specified voltage, usually Vcc/2 or 1.5V.% z+ r3 n+ T( |* G
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