???á?§????

???á?§?????¨?ò??UJT???????ù???????????ü??????????????PN?á????????×è??????????°??????÷?????ü???ù??????×?????×èN???è????????·?±????·?·?????????????ù??b1??b2?????è??????????b2???à??????·¨??×÷????P??×÷??·?????e?????á????·????????§????????1?ù????

??1?????á?§????

???????á?§??????????

????1?????????????ù??b1??b2????????×è?????ù????×è?? rbb=rb1+rb2 ??????rb1----?????ù????·????á????????×è??????????·????????÷ie??±?????rb2???????ù????·????á????????×è??????????ie??????·????á??PN?á?????????????§?? ?????????????ù??b2??b1????????????Vbb???òA?????????? VA=[rb1/(rb1+rb2)]vbb=(rb1/rbb)vbb=??Vbb ????????----????·???±?????????°???0.3---0.85??????????·?????????VE?????????????????????????á?§??????·ü°???????????2

??2?????á?§??????·ü°?????

?¨1???±Ve???? Vbb?±??·????á????·??ò????????×???????·????????????????????÷Iceo?? ?¨2???±Ve???? Vbb+VD VD???????????ò?????¨????0.7·ü????PN?á???ò???¨??Ie??????????rb1×è????????????Ve?à?????????????????????÷????·?????????????????????×è????????×???????????????×è????????P????·???????????????·??????????????÷??·?±?????·???????Vp??·??????÷Ip??·??????÷Ip??Ip?????ò?????÷???ü???????á?§???????¨?ù?è??×??????÷??????Vp=??Vbb ?¨3????×?·????????÷ie??????????Ve??????????????V???ó??Ve??????????????V????????????????????·??????????????÷????????????????Vv?????????÷Iv?? ?¨4??????V???ó??·????????????ù????°????????????÷×???????±???×??????ù??uc?????????±??ie±?????????????????Vv?????????á?§???????¨??×???·???????????????Ve??Vv????×???????????

???????á?§???????÷??????

?¨1???ù??????×èRbb ·????????·?±???ù??b1??b2????????×è????°???2--10?§?·???????????????????????ó?? ?¨2??·???±??? ????×??????á?????¨??????????°???0.3--0.85?? ?¨3??eb1??·??ò????Vcb1 b2???·???????¨·??ò????Vcb2?????ù??b1??·?????e??????·??ò?????? ?¨4??·??ò???÷Ieo b1???·???????¨·??ò????Vcb2????eb2????·??ò???÷?? ?¨5??·?????±???????Veo ??×??ó·????????¨???÷?±??eb1?????????? ?¨6??·??????÷Ip ???á?§?????????????¨?±??·???????????·????????±??·????????÷