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Discussion Groups | Comp.DSP | Modeling DAC in MATLAB


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Modeling DAC in MATLAB - novice_engineer - 2005-03-12 16:39:00

Hi,

I am trying to model a 16bit DAC in MATLAB with its nonlinearities
and practical impariments.  Does anyone have any idea how to do this ?
Thanks.

Andy


		
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Re: Modeling DAC in MATLAB - Tim Wescott - 2005-03-12 18:43:00

novice_engineer wrote:

> Hi,
> 
> I am trying to model a 16bit DAC in MATLAB with its nonlinearities
> and practical impariments.  Does anyone have any idea how to do this ?
> Thanks.
> 
> Andy
> 
Matlab or Simulink?  Simulink has a quantization block, Matlab probably 
makes you roll your own -- you can just use floor(x) if you don't mind 
quantizing in steps of 1.0.

Integral and differential nonlinearities will be tougher, because a data 
sheet will only spec the worst-case, and it won't be very forthcoming 
about the nature of the nonlinearities that you can expect.  If you 
really need accuracy there you have some studying to do.

-- 

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com