[理工] [電子] Diode 問題 東華電機所

[becomesonumb (貓大便)]

http://ppt.cc/62at

題目

Consider the circuit shown in the link

A string of three diodes is used to provide

a constant votage of about 2.1V Assuming n=2

, calculate the percentage change in this

regulated voltage caused by

(1)A 正負10% change in the power-suply voltage.

(2)Connection of a 1K load resistance.



我要問的是第二題為什麼

ΔVo = 3r(diode)ΔI(diode) = -3r(diode)ΔI(load)





吳定中電子學P2.28

題型分析P2-21也有一模一樣的題型
※ 編輯: becomesonumb    來自: 61.58.103.145        (11/28 17:52)
推 kensu:接了負載會有負載電流IL把這條電流當訊號.也就是改變量
推 kensu:vo變化量.應該等於 -ILx 3rd並1 rd很小.所以3rd並1約等於
→ kensu:3rd