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Cadence virtuoso tool related

salamkgp

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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  • salamkgp

    Sir, I am using the measurement tool for spectrum available with Cadence Virtuoso ADE. I am not doing the PSS analysis. After running the transient simulation, transient domain waveform can be given to the spectrum with proper start/stop time, sample count/freq, selecting the window type as rectangular, we can plot the FFT. It will display the SNR, SINAD, ENOB, SFDR etc..


    I have applied a sinusoidal input from AnalogLib_hspice with amplitude 1V, frequency (100MHz * 8191/16384). Run for FFT is plotted with start/stop time of 0/163.84u. screenshot is inserted with this reply.

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  • salamkgp

    Sir, I am using the measurement tool for spectrum available with Cadence Virtuoso ADE. I am not doing the PSS analysis. After running the transient simulation, transient domain waveform can be given to the spectrum with proper start/stop time, sample count/freq, selecting the window type as rectangular, we can plot the FFT. It will display the SNR, SINAD, ENOB, SFDR etc..


    I have applied a sinusoidal input from AnalogLib_hspice with amplitude 1V, frequency (100MHz * 8191/16384). Run for FFT is plotted with start/stop time of 0/163.84u. screenshot is inserted with this reply.

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