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The Designer's Guide Community Forum › Simulators › Circuit Simulators › How to calculate SNR in Hspice or Spectre?
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How to calculate SNR in Hspice or Spectre? (Read 3875 times)
sch
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How to calculate SNR in Hspice or Spectre?
Jun 13th, 2004, 10:35pm  
I am runing a DAC circuit using the FFT command in Hspice.Did anyone know how to calculate the SNR in Hspice ?Have any difference to calculate the DAC SNR by Hspice and Matlab?
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Spice_Oracle
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Re: How to calculate SNR in Hspice or Spectre?
Reply #1 - Jun 22nd, 2004, 10:07am  
Try setting

.option fftout

This will print the THD, SNR and SFDF.  It will also cause HSPICE to sort the harmonics of the fundamental by size.
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weiliang
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Re: How to calculate SNR in Hspice or Spectre?
Reply #2 - Jun 27th, 2004, 11:53pm  
For Spectre, you can use PSS to find the signal voltage and use PNOISE to find the noise voltage. Then, use user-defined equation of Calculator to access the result.
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