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

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how to convert digital data into analog data using matlab code? and vice versa... i.e., converting back analog data into digital data?
  2 Comments
Azzi Abdelmalek
Azzi Abdelmalek on 25 Oct 2013
What is the range of your analog signal, how many bits are you sing?
Sharada Reddy
Sharada Reddy on 31 Jan 2017
can you tell me how is the DAC in matlab works..? Any codes to convert digital into analog signal

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Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 25 Oct 2013
Edited: Azzi Abdelmalek on 25 Oct 2013
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
  2 Comments
Richard Lyons
Richard Lyons on 20 Jan 2017
Mr. Abdelmalek's code sure looks like analog to digital conversion to me. What the original poster wanted was digital to analog conversion!

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More Answers (2)

po-wei huang
po-wei huang on 18 Apr 2020
You can try this sample. Here contain DAC procedure. (But quantizing is skipped.)

Walter Roberson
Walter Roberson on 18 Apr 2020
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.

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