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Interfacing MegaWizard NCO with DA converter

Altera_Forum
Honored Contributor II
‎11-07-2008 07:58 PM
1,087 Views

Dear all 

 

 

I'm trying to connect MegaWizard NCO output to Digital-to-Analog converter. Since NCO output is two's complement and DAC does not accept two's complement, I need to convert two's complement to standard number system. Is there a simple way of converting in VHDL? Which library do I have to use? 

 

Thank you and I'm look forward to hearing from you.
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Altera_Forum
Honored Contributor II
‎11-07-2008 08:45 PM
402 Views

Hi, 

 

What is your DAC's number system. If it is not 2's complement then it is likely to be offset binary and then conversion is easy, just invert the sign bit. 

 

Kaz
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Altera_Forum
Honored Contributor II
‎11-08-2008 12:05 AM
402 Views

Kaz, 

 

I changed my code and now I can see correct and clean spectrum. Thank you very much! 

 

ziwukim
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