%
% A/D轉(zhuǎn)換
%

%A/D
function [Y,ff1]=a2d(x,ff);
N=10;            %10位AD
N1=length(x);
k=2;
Vmax=5;          %電壓5v
ad1=Vmax/2.^N;
ad2=round(x.*2^N/Vmax);  %取整
ad=ad1.*ad2;
for n=1:N1/k;
Y(n)=ad(n*k);   %采樣頻率變?yōu)樵瓉?lái)的一半，y(n)為1500點(diǎn)
ff1(n)=ff(n*k)/k;
end;