标题:
?????????????±??????????·???????
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作者:
zona
时间:
2004-2-11 20:49
标题:
?????????????±??????????·???????
[?á??]
???????è?????????????????????ê????????????·?????·??????????????????????????????????????±????????????????????·???????
[????]
?????ê?????ù±?????×è?????????????????°?ì×è?????????ò??????????????????????×è??(output impedance)??×?????????×è??????????????????×?????????(topology)??????????????·???????????(termination)???÷??×???????????
??·?????????????????×??????????????????¤???????????ù?¤???í?????????????à(?????à????·?×è?????¨)?????±±?????±???????????±???????????????·?????????????????????×???????×?????(side-by-side)????????????×????????à??????(over-under)????°????°??side-by-side??????·??????à??
??????·????????¨????????????????????????·????????????????ù?????????????????????±??????????·¨??????·?????????
作者:
zona
时间:
2004-2-11 20:52
标题:
?????±??????????·?????
?á???????????????????????ò????????±??í????×è????(conductor loss), °ü?¨??·??§??(skin effect), ?í?????é????????dielectric loss?? ???????ò×????????í??·??????????§??(transmission line effect)?±, ???????????????????????°?ì?????? ??·????????????á?°?ì?÷×???????×è??, ±???????, ?ù??·??????í(voltage divider)???á?????????????????????????????? ????, ?ò???????????????????í??·???????????????, ?ù??????·¨??????
????·?????????·????????????±?????ü???????? ?ù?????±?????ü???ò???????à?á?°?ì????·?×è??(differential impedance)????, ???????è????·??????????????? ?è???????????ò????±?????·?×è???????????? ?????????????ü, ??·?×è?????á??????, ???á?°?ì?????ê????(signal integrity)?°?±??????(timing delay)??
??·?×è?????????? 2(Z11 - Z12), ????, Z11??×???±??í??????×è??, Z12????????·??????ò?????????ú?ú??×è??, ?????à?????? ?ù??, ???è????·?×è????100?·?·?±, ×???±??í??????×è?????¨?????ó??50?·?·?? ???????ó?à??, ????·????í??????????
????????·???????????????×è?¨???á??, ????????????·?×è???????? ???ù?????·???á??????
作者:
kodom
时间:
2004-2-19 12:50
???? Z11 ??Z12 ????????????
??trace length & width ????°?
????°?×????é??????????????????????°???
???????????á???á??°??§?????????????ó???ó??????
作者:
????
时间:
2004-2-19 13:11
Z11??×???±??í??????×è??, Z12????????·??????ò?????????ú?ú??×è??, ?????à??????
????°?×????é?????????????????°?ì???é????????dielectric loss???????????±?ò???á°ü?¨??????
?í??°??§??????°?×???????????????×??????????????¤???ó?????????????????????????????????á?????à°???????
作者:
baiyujia
时间:
2005-5-15 18:18
??allegro???????è????·???
作者:
jackjm
时间:
2005-7-24 22:05
??×???°??????????????á????????
作者:
smile
时间:
2005-8-8 15:07
QUOTE:
??????????baiyujia??2005-05-15 6:18 PM·?±í?? :
??allegro???????è????·???
logic----??assign differential pair?????ó??electrical constraint spreadsheet...?????????è?????í?????à
??????????????????????????5??·????????????????í????????????°???????????????????????????
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