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本帖最後由 heavy91 於 2010-7-1 02:11 PM 編輯 9 H0 _9 r( B/ T! w2 V" k3 C) }% O, g, ^
) K# p( ~ Y/ p% nRelation of jitter type material~~
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Jitter can be defined as the deviations in a clock’s output transition" A+ G t: c: S8 Z/ u- `. D
from their ideal positions. The deviation can either be leading or, A/ Y" ?" {% U, n1 x* _/ W
lagging the ideal position. Jitter is usually specified in ± pico seconds., f' Q% B# e7 H% Q
Jitter measurements can be classified into three categories:$ o& Z4 A5 b1 P+ b
cycle-to-cycle jitter, period jitter, and long-term jitter. All jitter measurements
( N% n( u0 u2 C @6 aare at a specified voltage, usually Vcc/2 or 1.5V. u+ e6 G$ w$ {' G4 n, Q
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