How to do FFT in cadence?

[yiyin]

calculator fft cadence

How to do FFT in cadence with Spectre as simulation tool?
which window should I use in the function "dft"?

I found if I use "rectangle", the spectrum looks best, is it ok?

I used "Kiaser" in my Matlab simulation, but if I use "Kiaser" in cadence
the output spectrum looks bad.....
Is there any thing wrong?

If I wanna use the simulation data generated by Spectre, how can I get them?

Thank you very much.

 

[yibinhsieh]

The DFT window depends on your signal quality. You can always use rectangle window if your point is of power 2 (like 2^12) and your signal is sampled periodically. That will get the best results.

Yibin.

 

[layes2]

in calculator there is fft

 

[yeechyan]

In Analog Design Environment, click tools and select calculator. In the calculator, select the data of interest first. Then click Special Functions to get the analysis you want.