How to solve two equations in matlab to obtain the value of a variable using solve command?

1 次查看（过去 30 天）

ANWESHA 2014-6-6

I want to solve the two equations given below:

Ids=(2*pi*R/L)*(Meff./(1+(do.*Meff.*Vds./(vsat*L)))+(lamda/L)).*(2*Vth.*(Qs-Qd))+((Qs^2-Qd.^2)./(2*Cn))+(Vth*Qo.*log((Qd+Qo)./(Qs+Qo)));

Ids=(2*pi*R.*Cn.*(-Qii+sqrt(Qii.^2+(4*(Vth^2)*(log(1+exp((Vg-Vtqm+dVtqm-Vdssat)./(2*Vth)))).^2))).*(vsat+(lamda*Vds./L^2))))

For the 1st equation all the values of the variables are known. Equating the 1st equations to the 2nd the value of Vdssat is needed to be found.

Values of the given variables:

R=2.5e-7;

L=180e-7;

Meff=214.0586;

Vds=0:0.01:1.2;

vsat=1e7;

lamda=40e-5;

Vth=0.0259;

Qs=2.6934e-6;

Qo=4.2308e-7;

Cn=2.438152e-06;

Qii=((2.*Cn.*Vth^2)/Qo);

Vtqm=0.13771;

dVtqm=7.535e-08;

Vg=1.25;

Qd=Cn.*(-Qii+sqrt(Qii.^2+(4*(Vth^2)*(log(1+exp((Vg-Vtqm+dVtqm-Vds)./(2*Vth)))).^2)));

Ec=3.27306227e4;

do=(Vds/(L*Ec)).*(1.5+(Vds/(L*Ec))).^-1;

how to solve the equations using the solve command?

Sciences Chemistry

在 Help Center 和 File Exchange 中查找有关 Chemistry 的更多信息

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by