ãã解ï¼å¾ä¸æ²¡æR5ï¼åªæR0ï¼å§ä¸æR0ä½ä¸ºR5å§ãå¦ä¸å·¦å¾ã
ãã1ãæ±Uocãå°R5ä»çµè·¯ä¸æå¼ï¼å¦å¾ï¼aï¼ï¼çµè·¯åå为ä¸ä¸ªç¬ç«çåè·¯ã
ããçµæµæºIs1æµè¿çµé»R2ãR1ï¼æ以Ufb=Is1ÃR2=1Ã2=2ï¼Vï¼ã
ããæ¾ç¶Uef=-Us1=-2ï¼Vï¼ãUad=Us2=2Vã
ããçµæµæºIs2åªæµè¿çµé»R4ï¼æ以Ude=-Is2ÃR4=-4Ã2=-8ï¼Vï¼ã
ããå æ¤ï¼Uoc=Uab=Uad+Ude+Uef+Ufb=2+ï¼-8ï¼+ï¼-2ï¼+2=-6ï¼Vï¼ã
ãã2ãæ±Reqãåå°çµè·¯ä¸ççµåæºçè·¯ãçµæµæºå¼è·¯ï¼å¾å°å¦å¾ï¼bï¼ã
ããæ以ï¼Req=R4+R2=2+2=4ï¼Î©ï¼ãï¼å ¶ä¸R3被çµåæºUs1çæ¥ï¼æ以ä¸èµ·ä½ç¨ï¼ã
ãã3ãç±æ¤å¾å°æ´ç»´åçæçµè·¯ï¼å¦å¾ï¼cï¼ã
ããæ以ï¼I=Uoc/ï¼Req+R5ï¼=-6/ï¼4+2ï¼=-1ï¼Aï¼ã
Uab = Is1 * R2 - Us1 - Is2 * R4 + Us2
Rab = R2 + R4
I = Uab / (Rab + R0)
本回答被提问者采纳