Digital Delta-Sigma modulátor

[Ansunamu]

Kdokoliv může průvodce mi, jak vytvořit digitální Delta-Sigma modulátor?První příkaz nebo secomd objednávka bude ok!Nemám ponětí o vybudování Matlab model pro multi-bit náměty Delta-Sigma modulátor!

Po vybudování Matlab model, jak se jeden program quantizer by Verilog?Mám prostě ignorovat LSB?

 

[brmadhukar]

Nazdar,
Záleží na aplikaci.Pokud budete chtít použít pro ADC volba závisí na počtu bitů rozlišení, které potřebujete v konečném ouput a můžete ignorovat LSBs.
BRM

 

[wwfhm2002]

Samozřejmě ne.Například:

funkce [ds3out, out3, Out2, out1, fb] = ds31 (první, insamp, out3, Out2, out1, fb)

if (reset == 0)
out1 (2) = insamp/16 - fb (1) / 16 out1 (1);
Out2 (2) = out1 (1) - fb (1) / 4 - out3 (1) / 128 Out2 (1);
out3 (2) = Out2 (1) - fb (1) * (1 / 2 1 / 4) out3 (1);
kvantovaný = quantizer (out3 (2));
ds3out = kvantovaný;

% aktualizace ds3 stavu
unquantized = unquantizer (kvantovaný);
out1 (1) = out1 (2);
Out2 (1) = Out2 (2);
out3 (1) = out3 (2);
fb (1) = unquantized;
jiné
out1 (1:2) = 0; ds3out = 0; Out2 (1:2) = 0; out3 (1:2) = 0;
konec;Funkce quantizer_out = quantizer (insamp)% Quantizer pro delta-sigma modulátoru

qlevel0 = 30720;
qlevel1 = 26624;
qlevel2 = 22528;
qlevel3 = 18432;
qlevel4 = 14336;
qlevel5 = 10244;
qlevel6 = 6144;
qlevel7 = 2048;
qlevel8 = -2048;
qlevel9 = -6144;
qlevel10 = -10244;
qlevel11 = -14336;
qlevel12 = -18432;
qlevel13 = -22528;
qlevel14 = -26624;
qlevel15 = -30720;

if (insamp> qlevel0)
quantizer_out = 16;
konec;

if ((qlevel0> = insamp) & (insamp> qlevel1))
quantizer_out = 15;
konec;

if ((qlevel1> = insamp) & (insamp> qlevel2))
quantizer_out = 14;
konec;

if ((qlevel2> = insamp) & (insamp> qlevel3))
quantizer_out = 13;
konec;

if ((qlevel3> = insamp) & (insamp> qlevel4))
quantizer_out = 12;
konec;

if ((qlevel4> = insamp) & (insamp> qlevel5))
quantizer_out = 11;
konec;

if ((qlevel5> = insamp) & (insamp> qlevel6))
quantizer_out = 10;
konec;

if ((qlevel6> = insamp) & (insamp> qlevel7))
quantizer_out = 9;
konec;

if ((qlevel7> = insamp) & (insamp> qlevel8))
quantizer_out = 8;
konec;

if ((qlevel8> = insamp) & (insamp> qlevel9))
quantizer_out = 7;
konec;

if ((qlevel9> = insamp) & (insamp> qlevel10))
quantizer_out = 6;
konec;

if ((qlevel10> = insamp) & (insamp> qlevel11))
quantizer_out = 5;
konec;

if ((qlevel11> = insamp) & (insamp> qlevel12))
quantizer_out = 4;
konec;

if ((qlevel12> = insamp) & (insamp> qlevel13))
quantizer_out = 3;
konec;

if ((qlevel13> = insamp) & (insamp> qlevel14))
quantizer_out = 2;
konec;

if ((qlevel14> = insamp) & (insamp> qlevel15))
quantizer_out = 1;
konec;

if (qlevel15> = insamp)
quantizer_out = 0;
konec;Funkce unquantizer_out = unquantizer (insamp)% Unquantizer pro delta-sigma modulátoru

qlevel0 = 32768;
qlevel1 = 28672;
qlevel2 = 24576;
qlevel3 = 20480;
qlevel4 = 16384;
qlevel5 = 12288;
qlevel6 = 8192;
qlevel7 = 4096;
qlevel8 = 0;
qlevel9 = -4096;
qlevel10 = -8192;
qlevel11 = -12288;
qlevel12 = -16384;
qlevel13 = -20480;
qlevel14 = -24576;
qlevel15 = -28672;
qlevel16 = -32768;

if (insamp == 16)
unquantizer_out = qlevel0;
konec;

if (insamp == 15)
unquantizer_out = qlevel1;
konec;

if (insamp == 14)
unquantizer_out = qlevel2;
konec;

if (insamp == 13)
unquantizer_out = qlevel3;
konec;

if (insamp == 12)
unquantizer_out = qlevel4;
konec;

if (insamp == 11)
unquantizer_out = qlevel5;
konec;

if (insamp == 10)
unquantizer_out = qlevel6;
konec;

if (insamp == 9)
unquantizer_out = qlevel7;
konec;

if (insamp ==

<img src="http://www.edaboard.com/images/smiles/icon_cool.gif" alt="Chladný" border="0" />unquantizer_out = qlevel8;
konec;

if (insamp == 7)
unquantizer_out = qlevel9;
konec;

if (insamp == 6)
unquantizer_out = qlevel10;
konec;

if (insamp == 5)
unquantizer_out = qlevel11;
konec;

if (insamp == 4)
unquantizer_out = qlevel12;
konec;

if (insamp == 3)
unquantizer_out = qlevel13;
konec;

if (insamp == 2)
unquantizer_out = qlevel14;
konec;

if (insamp == 1)
unquantizer_out = qlevel15;
konec;

if (insamp == 0)
unquantizer_out = qlevel16;
konec;