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The resolution of sin wave

Medya

 Hi

I do fft(using dft with N=1024 and set the input freq=100M*17/1024 ,strobperiode=10ns and simulation time>10240ns) on the output of the sin wave,and see that the noise floor is about -100db i repeat it for variuos step(strobperiode) and simtime but the noise floor doesn't vary more,I'm so confused that how can test the high resulotion adc with this low resolution wave,is the way to solve this problem

thanks

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  • Andrew Beckett
    So, which version of the simulator are you using (this should show up in the spectre ouput)? Which version of Virtuoso are you using? (Help->About in the CIW).

    Can you post the actual netlist you simulated and the actual calculator DFT expression you used?

    Andrew
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  • Andrew Beckett
    So, which version of the simulator are you using (this should show up in the spectre ouput)? Which version of Virtuoso are you using? (Help->About in the CIW).

    Can you post the actual netlist you simulated and the actual calculator DFT expression you used?

    Andrew
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