how to convert digital data into analog data using matlab code?

Question

Sivakumaran Chandrasekaran 2013-10-25

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回答： Walter Roberson 2020-4-18

how to convert digital data into analog data using matlab code? and vice versa... i.e., converting back analog data into digital data?

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Azzi Abdelmalek 2013-10-25

What is the range of your analog signal, how many bits are you sing?

Sharada Reddy 2017-1-31

can you tell me how is the DAC in matlab works..? Any codes to convert digital into analog signal

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Answer 1

Azzi Abdelmalek 2013-10-25

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编辑：Azzi Abdelmalek 2013-10-25

U=10; % range signal from 0 to 10
n=3 % number of bits
q=U/(2^n-1)  % quantization interval
t=0:0.1:10; % your time vector
y=abs(10*sin(t)); % your signal
% -------convert to a digital signal yd-----------
a=fix(y/q);
yd=dec2bin(a,n)
% ------you can calculate the signal yq ----------
yq=a*q 
%-------------------------------------------------
plot(t,y,'r')
hold on
plot(t,yq,'g')
hold off

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Richard Lyons 2017-1-20

Mr. Abdelmalek's code sure looks like analog to digital conversion to me. What the original poster wanted was digital to analog conversion!

Walter Roberson 2017-1-20

The original question also asked "and vice versa"

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Answer 2

po-wei huang 2020-4-18

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You can try this sample. Here contain DAC procedure. (But quantizing is skipped.)

https://poweidsplearningpath.blogspot.com/2020/04/ch4-adcdac-how-to-simulate-adcdac.html

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Answer 3

Walter Roberson 2020-4-18

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The only built in facility for converting digital to analog are the ones that output to audio devices such as sound() or audiodevicewriter, unless you want to count graphics operators. Or if you want to include the ability to set and clear DTR on a serial port. Everything else needs to talk to a digital to analog converter.