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作者 deathcustom 在 PTT [ Electronics ] 看板的留言(推文), 共1455則
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1F推: 電子學只要記熟KCL跟KVL02/20 18:19
3F推: 不可以02/10 15:27
10F推: 回去看一樓,再Google何謂BIBO條件就知道了,這是控01/23 18:09
11F→: 制系統的ABC01/23 18:09
1F→: 明確來說,小信號本來就是近似,這個模型帶來的誤差01/03 14:39
2F→: 會造成(放大器)輸出的高次諧波01/03 14:40
3F→: 當你有某個THD需求的時候,本來就需要檢視相應的01/03 14:40
4F→: 輸入限制,不是甚麼"應限制gm在5%以內",而是(因為實01/03 14:41
5F→: 際電路需求,我的gm誤差必須限制在5%以內"01/03 14:42
1F推: 1. 兩者增益都是79.6dB,沒有人會在乎那一點點差異05/09 09:28
2F推: Vs的common應該沒特別定義,那就視為0,因此一旦Vo05/09 09:30
3F→: 不是0就會被回授電路拉到005/09 09:30
2F推: 兩個零點在dc,兩個極點分別在20/200, 高頻增益38dB03/09 22:16
3F推: A*s^2/(s+20)(s+200), A= 38dB ~ 8003/09 22:20
5F推: 分母是|200*20-f^2+220jf|,f<<20的話可忽略03/15 01:12
3F推: |A|=gmRD=2IDRD/Vov11/18 01:31
1F推: 假設沒有ro,先拿掉1M電阻,放大率是110010/16 04:32
2F→: 電阻放上去,用miller10/16 04:33
3F推: K=-1100,Rin=1M/(1+1100)=90810/16 04:37
4F推: Wait...10/16 04:56
5F→: Couple電容在那,所以看不到5k10/16 04:56
1F→: 1. yes 2. 有時候是Vo/Vs10/11 21:14
1F推: T哪有變成串連,都是並聯啊10/11 18:42