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How to choose the window for fft? (Read 2075 times)

material New Member Offline Posts: 2	How to choose the window for fft? May 31^st, 2006, 8:37am I wanted to analyse the frequency domain information by do fft to the tran signal. When I choose the window for fft, different window will give a dfferent result and really a big difference. I used such window like rectangle hann hamm or so on. How to select the right window for fft? Thanks
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sheldon

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Re: How to choose the window for fft?
Reply #1 - May 31^st, 2006, 7:40pm

Material,

If you using Spectre and analyzing non-sampled circuits, op-amps, etc.,
then use the Fourier component. If you are simulating a Nyquist ADC/DAC
/SH use the rectangular function. If you are simulating an Over-sampled
ADC/DAC, then use the Hann window function. The details of the simulation
setup for Nyquist and Over-sampled cases have been discussed in previous
appends.

Best Regards,

Sheldon

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