Need example of generating n-bit signal for D/A simulation

• Dec 26, 2004

• #1

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Analog_starter

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spectreverilog example download

Hi all,

Who can give me a Matlab/Simulink example to generate the n-bit digital sine signal for a n-bit D/A SNR etc. simulation?

Thanks & Best Regards
Analog_starter

 

• Dec 26, 2004

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markty

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.vec & hspice simulation

Use the Quantizer in the simulink toolbox.

 

• Dec 27, 2004

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simulation d/a with matlab

You can also use script to descript the DAC in matlab besides Simulink. However, you may need to put noise inside as well. When you do SNR, it will be better to Bin it, then FFT/DFT.

 

• Dec 28, 2004

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Re: About D/A simulation

What do you to bin it before FFT?

Added after 25 seconds:

What do you to bin it before FFT?

 

• Dec 28, 2004

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About D/A simulation

it is simple.
use simulink's sinwave block to generate a sinwave based sampling mode, and do fft to it

 

• Dec 28, 2004

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Re: About D/A simulation

Where to download the Matlab script file or Simulink model to do D/A simulation ?

 

• Dec 28, 2004

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Re: About D/A simulation

Yes, I also want to get the Matlab script file or Simulink model to do D/A simulation.

BTW, how can I put the digital sine signal code generated by Matlab/Simulink to a real case DAC for HSPICE simulation, then FFT for SNR? Or is there any better way to do this?

Thanks & Best Regards
Analog_starter

 

• Dec 28, 2004

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arsenal

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About D/A simulation

u may generate it using vec file in hspice

 

• Dec 29, 2004

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xuel

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Re: About D/A simulation

arsenal said:

u may generate it using vec file in hspice

Click to expand...

how to do it? please give a detailed explanation or example, thx.

 

• Dec 29, 2004

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soccer

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About D/A simulation

matlab's simulink tool

 

• Dec 29, 2004

• #11

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arsenal

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Re: About D/A simulation

xuel said:

arsenal said:

u may generate it using vec file in hspice

Click to expand...

how to do it? please give a detailed explanation or example, thx.

Click to expand...

ok,vec file just descripts waveforms in ascii file and u can look it up in the help files of hspice.
and there is another very simple way to give the stimuli:
just use N vpulses in hspice and by setting different delay and period u can get wanted N input waveforms

 

• Dec 29, 2004

• #12

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Re: About D/A simulation

Analog_starter said:

Yes, I also want to get the Matlab script file or Simulink model to do D/A simulation.

BTW, how can I put the digital sine signal code generated by Matlab/Simulink to a real case DAC for HSPICE simulation, then FFT for SNR? Or is there any better way to do this?

Thanks & Best Regards
Analog_starter

Click to expand...

You also can use spectreVerilog simulator. Save the sample sinewave data into a ASCII file, write a verilg code to read the data. Then you can put verilog model as input to the real D/A in spectreVerilog simultor.
Hope it helps.

 

• Dec 30, 2004

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Re: About D/A simulation

Is that mean Cadence Spectra can do mixed-mode circuit simulation ?

 

• Dec 30, 2004

• #14

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field_catcher

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Re: About D/A simulation

xwcwc1234 said:

Is that mean Cadence Spectra can do mixed-mode circuit simulation ?

Click to expand...

not the spectre simulator. It is spectreVerilog simulator. spectreVerilog simulator uses spectre to do analog simulation and verilog_XL to digital simulation, it has scheme to let these two simulator communicate with each other.