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Simulators >> Circuit Simulators >> How to calculate SNR in Hspice or Spectre?
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Message started by sch on Jun 13^th, 2004, 10:35pm

Title: How to calculate SNR in Hspice or Spectre?
Post by sch on Jun 13^th, 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?

Title: Re: How to calculate SNR in Hspice or Spectre?
Post by Spice_Oracle on Jun 22^nd, 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.

Title: Re: How to calculate SNR in Hspice or Spectre?
Post by weiliang on Jun 27^th, 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.