close all
clc
clearvars
ud=[0 0.140 0.223 0.250 0.336 0.402 0.406 0.452 0.462 0.479 0.492 0.6 0.64 0.68 0.7 0.72 0.74 0.76 0.77 0.79];

I0 = 10^-9;
m = 1.5;
Vth = 0.025;

f=@(ud)(I0*exp(ud/(m*Vth)));
fplot(f, [0, 0.8])
hold on;
id = f(ud);
plot(ud, id', '*');
xlabel('Ud[V]');
ylabel('Id[A]');
title('Carcateristica diodei');