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Does DFT give signal/noise information? How to Simualtion SNR?

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icanalyst

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I'm trying to simulate SNR for my circuit which is not related to ADC, DAC or Sample-hold.

Can I use DFT to simulate SNR which seems a popular method to do for ADC and DAC? Does the DFT give correct signal and noise information at frequency bin of interest?

Thank you,
 

If you just wanna know thermal/flicker noise for most linear circuits, you could simply use "noise" simulation. I'm afraid that DFT is just for the simulation of quantization noise for sampling circuits.
 
Thank you! That's exactly what I was thinking.

My circuit is not VCO related, can I use PSS/PNOISE to simulate the noise?
 

If it's nonlinear, using PSS/PNOISE would be best.
 
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