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作者 positMIT 在 PTT [ Grad-ProbAsk ] 看板的留言(推文), 共15則

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[理工] 清大104 計算機系統

[ Grad-ProbAsk ]14 留言, 推噓總分: +2

作者: evor - 發表於 2016/01/24 16:46(10年前)

13^F推positMIT: push01/26 21:43

[理工] 104台聯大電機-關係合成

[ Grad-ProbAsk ]6 留言, 推噓總分: +1

作者: qDaniel - 發表於 2016/01/20 02:02(10年前)

2^F→positMIT: S->R S的 x-'y'->R的 'x'-y S的輸出就是R的輸入01/20 09:15

3^F→positMIT: 所以中間的變數要設一樣01/20 09:15

[理工] [電子]一個回授觀念問題

[ Grad-ProbAsk ]6 留言, 推噓總分: +1

作者: kela12340 - 發表於 2012/03/21 11:52(14年前)

1^F推positMIT:你可以把1/Rf想成另一個gm值(∵Rf值越小,經過Rf電流越大)03/21 17:32

2^F→positMIT:只要放大器的gm>1/Rf,則Feedforward可視為Amp獨自貢獻03/21 17:34

3^F→positMIT:事實上Rf對Vout有前饋貢獻,一般因計算太複雜不考慮.03/21 17:36

4^F→positMIT:另外feedback公式成立條件:訊號必全流過β網路(ie,電流無03/21 17:41

5^F→positMIT:分流,電壓無耗損)03/21 17:41

[理工] [電子]小訊號

[ Grad-ProbAsk ]3 留言, 推噓總分: +1

作者: bbbbbbbbbb - 發表於 2012/02/15 14:01(14年前)

2^F推positMIT:直接把Rpi和Re當做並聯電阻　Ix完全流入寫兩條KCL就解得02/16 01:35

3^F→positMIT:建議不要用Rq來等效,直接用電流想法去解釋 (Vx擺在C極)02/16 01:36

[理工] [電子] MOS 電流鏡

[ Grad-ProbAsk ]6 留言, 推噓總分: +2

作者: a149851571 - 發表於 2012/02/15 01:25(14年前)

1^F推positMIT:12. M2 M4 Vgs一樣　故Vov相同 Vo(min)=Vov3+Vgs402/15 02:13

2^F→positMIT: 比例關係求得Vov3=1/2 *0.2=0.1 Vo(min)= 0.1+0.8=0.9V02/15 02:14

3^F→positMIT:16. yes02/15 02:14

5^F推positMIT:ID3=ID4 電流相同 (W/L)3*Vov3^2 = (W/L)4*Vov4^202/15 10:49

Re: [理工] 電子學消除雜訊

[ Grad-ProbAsk ]4 留言, 推噓總分: +4

作者: jamtu - 發表於 2012/01/13 09:57(14年前)

4^F推positMIT:推02/02 12:48

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