OP輸入阻抗 - 考試
By Adele
at 2021-03-28T23:49
at 2021-03-28T23:49
Table of Contents
有請高手大大幫忙,求解Ri
書本只寫這樣,函授也只是帶過,看完還是不懂
兩個都是負迴授,所以都有虛短路
但為什麼:
反向就看到R1然後虛短路接地,Ri=R1
非反向虛短路看不到R1,Ri直接理想無限大?
非反向
https://i.imgur.com/1BFRs1U.jpg
反向
https://i.imgur.com/bwTfB4Q.jpg
來個100P懸賞最佳解,感謝再感謝
--
書本只寫這樣,函授也只是帶過,看完還是不懂
兩個都是負迴授,所以都有虛短路
但為什麼:
反向就看到R1然後虛短路接地,Ri=R1
非反向虛短路看不到R1,Ri直接理想無限大?
非反向
https://i.imgur.com/1BFRs1U.jpg
反向
https://i.imgur.com/bwTfB4Q.jpg
來個100P懸賞最佳解,感謝再感謝
--
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