I am using Cadence virtuoso 6.1.5. I am required to measure the SNR at the input and output of some Analog Circuits simulated at Nyquist rate, using Spectral Analysis. When measured for an ideal sinusoidal source (from analogLib) with simple resistive load (and capacitive load), I was getting less than 50 dB. Kindly help me in doing the proper settings of the tool, so that the SNR for the ideal source may be high (expected to be above 180 dB).
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