0.35µm 20MHZ-170MHZ FSPLL
AL2007LA
JITTER DEFINITION
Period Jitter
Period jitter is the maximum deviation of output clock's transition from its ideal position.
T1
Ideal Cycle
Fout
TJP
Cycle-to-Cycle Jitter
Cycle-to-cycle jitter is the maximum deviation of output clock's transition from its corresponding position of the
previous cycle.
Ti-1
Ti
Ti+1
Fout
TJCC = max (Ti+1 - T )
i
Long-Term Jitter
Long-term jitter is the maximum deviation of output clock' transition from its ideal position, after many cycles. The
term "many" depends on the application and the frequency.
Cycle 0
Cycle N
TJLP
15