※ 引述《linlin33 (linlin)》之銘言：
Fig. 3 shows a shunt regulator using a Zener diode whose model
is also shown in the figure. Assume the supply voltage Vs can
vary by ±ΔVs. Find the line regulation ΔVo/ΔVs.
(10pts)
↑
│ Vs±ΔVs
│ ｜
︴R ─┴─
︴ │ ┬ Vzn
├─────┬── Vo±ΔVo ╴╴/ ｜
│ │ Zener/╱╲ ≡ ︴
╴╴/ ｜ ￣￣ ︴Rz
Zener/╱╲ ︴Rl ｜ ｜
￣￣ ︴
｜ ｜ Model of the Zener diode
接地 接地
Vo = Vzn + Iz * Rz (Iz 為流經Zener diode的電流)
= Vzn + [(Vs-Vo/R)-(Vo/Rl)]*Rz
移項整理後：
Vo [(R*Rl + Rl*Rz + R*Rz)/R*Rl] = Vzn + Vs(Rz/R)
ΔVo | Rz
----- | = [(R*Rl)/(R*Rl + Rl*Rz + R*Rz)] * (Rz/R) = --------
ΔVs |Rl=∞ R + Rz
(Vo對Vs偏微)
有錯還請高手指正
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