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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯
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Relation of jitter type material~~
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Jitter can be defined as the deviations in a clock’s output transition% g* J# @' d& t, |" r
from their ideal positions. The deviation can either be leading or
1 V8 N7 C3 s4 w4 r+ i, Mlagging the ideal position. Jitter is usually specified in ± pico seconds.5 ?/ _: r+ m2 W/ J/ s, k/ r3 }
Jitter measurements can be classified into three categories:
5 X' F: t( G+ h0 \1 l8 pcycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements3 E. T/ o* L. I0 Z3 O
are at a specified voltage, usually Vcc/2 or 1.5V.( r' I; L7 M+ O) N; U
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