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YxA
YxA
YxB
YxA
YxB
YxB
vcxo_在
/vcxo_在
YxA
LVPECL
LVCMOS
yxa/b
vcxo_在
/vcxo_在
LVCMOS
LVCMOS
yxa/b
LVPECL
LVCMOS
tpd(lh) / tpd(hl); t
sk(p)
= | tpd(hl) − tpd(lh) |
LVPECL
LVPECL
t
sk(o)lvpecl
tsk
p_c
tpd(lh); t
sk(p)
= | tpd(hl) − tpd(lh) |
t
sk(o)lvcmos
CDCM7005
SCAS793A–JUNE2005–REVISEDJUNE2005
parametermeasurementinformation(持续)
一个.outputskew,t
sk(o),
iscalculatedasthegreaterof:
Thedifferencebetweenthefastestandtheslowestt
pd
(lh)n(n=0...4)
Thedifferencebetweenthefastestandtheslowestt
pd
(hl)n(n=0...4)
b.pluseskew,t
sk(p)
,iscalculatedasthemagnitudeoftheabsolutetimedifferencebetweenthehigh-至-低(t
pd
(hl))和
thelow-至-高(t
pd
(lh))propagationdelayswhenasingleswitchinginputcausesoneormoreoutputstoswitch,
t
sk(p)
=|t
pd
(hl)–t
pd
(lh)|.pulseskewissometimesreferedtoas
pulsewidthdistortionordutycycleskew
.
figure10.outputskew
14