102台電養成班(電子學) - 考試
By Emily
at 2014-03-29T02:29
at 2014-03-29T02:29
Table of Contents
[考題] 國考歷屆考題與考題觀念討論(書裡看到的選這個)請附上想法、出處
考題:
http://ppt.cc/a6Zm
答案:10(C) 11(B)
10.想請問Av如何求得 題目沒給β 似乎無法求得gm進而畫出小訊號等效電路圖
是否有其他方法能求得Av?
11.忽略Ib左邊電流應為1mA 最下面2kΩ電壓為2V
故Ie1=(2-0.7)/1kΩ=1.3mA
而Vce1+Vce2=18-(2k+1k)Ω*1.3mA
為何Vce2非上式求得之值/2??
想請教各位大大~感謝
--
考題:
http://ppt.cc/a6Zm
答案:10(C) 11(B)
10.想請問Av如何求得 題目沒給β 似乎無法求得gm進而畫出小訊號等效電路圖
是否有其他方法能求得Av?
11.忽略Ib左邊電流應為1mA 最下面2kΩ電壓為2V
故Ie1=(2-0.7)/1kΩ=1.3mA
而Vce1+Vce2=18-(2k+1k)Ω*1.3mA
為何Vce2非上式求得之值/2??
想請教各位大大~感謝
--
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