请教一个问题-拉扎维模拟电路课件上的一个问题

顶一下！。哪位打大虾帮忙啊。

假设 NMOS is in saturation -> Id=0.5*Un*Cox*W/L(Vgs-Vth)^2=0.5*Beta*Vov^2
KVL: Vx=Vgs+Id*Rs
-> R2/(R1+R2)*Vdd=(Vov+Vth)+0.5*Beta*Vov^2*Rs
-> Vov^2+[2/(Beta*Rs)]*(Vov+Vth)]-2*Vdd*[R2/(R2+R1)]/(Beta*Rs)=0
assume V1=1/(Beta*Rs)
-> Vov^2+[2*V1*(Vov+Vth)]-2*V1*Vdd*R2/(R2+R1)=0
-> Vov^2+2*V1*Vov+{2*V1*[Vth-Vdd*R2/(R2+R1)]}=0
-> Vov=-V1+{V1^2-{2*V1*[Vth-Vdd*R2/(R2+R1)]}}^0.5
-> Vgs=Vth-V1+{V1^2+2*V1[Vdd*(R1/(R2+R1))-Vth

补打完
假设 NMOS is in saturation -> Id=0.5*Un*Cox*W/L(Vgs-Vth)^2=0.5*Beta*Vov^2
KVL: Vx=Vgs+Id*Rs
-> R2/(R1+R2)*Vdd=(Vov+Vth)+0.5*Beta*Vov^2*Rs
-> Vov^2+[2/(Beta*Rs)]*(Vov+Vth)]-2*Vdd*[R2/(R2+R1)]/(Beta*Rs)=0
assume V1=1/(Beta*Rs)
-> Vov^2+[2*V1*(Vov+Vth)]-2*V1*Vdd*R2/(R2+R1)=0
-> Vov^2+2*V1*Vov+{2*V1*[Vth-Vdd*R2/(R2+R1)]}=0
-> Vov=-V1+{V1^2-{2*V1*[Vth-Vdd*R2/(R2+R1)]}}^0.5
-> Vgs=Vth-V1+{V1^2+2*V1[Vdd*(R1/(R2+R1))-Vth}^0.5 answer down

太感谢楼上那位兄弟了！ＥＥＴＯＰ牛人多，好人也多！我先研究一下哈。

不需要你这样来灌水。

好，谢谢！

tai太简单了

好像不是很难~·

学习中

学习了，感谢