关于ADC DNL INL测试数据处理的问题

zs1647

下面这段代码是用来处理测试数据的matlab代码！
请问代码中Vin,Vs,Vout,Vsample,Vshifted分别代表啥？谢谢
index=size(adcData);
% Columns for adcData matrix:
Vin=2;Vs=3;D8=4;D7=5;D6=6;D5=7;D4=8;D3=9;D2=10;D1=11;
% Columns for Dout matrix:
Vout=1;Vsample=2;Vshifted=3;
% OUTPUT CODE DATA RETRIEVAL
j=1;
k=181; % row with first sampled value
for i = 181:180:index(1,1)
Dout(j,Vout)=(round(adcData(i,D8))/2 + round(adcData(i,D7))/4 + round(adcData(i,D6))/8 + round(adcData(i,D5))/16 + round(adcData(i,D4))/32 + round(adcData(i,D3))/64 + round(adcData(i,D2))/128 + round(adcData(i,D1))/256)*0.55;
Dout(j,Vsample)=adcData(k,Vs);
k=k+180;
j=j+1;
end
totalCodes=size(Dout);
LSB=(Dout(256,Vout)-Dout(1,Vout))/256;
% END OF OUTPUT CODE DATA RETRIEVAL
idealLSB=0.55/256;
for i=1:totalCodes(1,1)
idealVT(i)=(i-1)*idealLSB;
end
Offset=Dout(2,Vsample)-idealVT(2);
for i=1:totalCodes(1,1)
Dout(i,Vshifted)=Dout(i,Vsample)-Offset;
end
% DNL/INL CALCULATION
for m=1:totalCodes(1,1)-1
DNL(m)=(Dout(m+1,Vshifted)-Dout(m,Vshifted)-LSB)/LSB;
INL(m)=(Dout(m,Vshifted)-idealVT(m))/LSB;
end

zs1647

关于ADC DNL INL测试数据处理的问题dd