Hello, Anyone know which python library could be use for analyzing transient signal (risetime, delay, freq, etc) similar to calculator in virtuoso?

@Ashbir Aviat Fadila:

numpy

is what you want; the

numpy.fft

package is good for analyzing frequency, SNR, etc. See, for example, https://github.com/efabless/caravel_SI_testing/blob/gf180mcu_ps/si_test.py . In particular, look at lines 220 and following, where I used the FFT package to determine the frequency of the clock output on the monitoring pins on Caravel.

@Tim Edwards How about analyzing the transient signal in time domain. I want to analyzed the clock signal. In matlab there several function to analyzing bilevel waveform. https://www.mathworks.com/help/signal/pulse-and-transition-metrics.html I could get risetime, pulsewidth, etc with that function. Is there any equivalent library for that? I could not find it in python

@Ashbir Aviat Fadila: Try `scipy`; for example, this example uses resampling and reshaping. But most measurements you need can be done in a straightforward manner by finding the sample times of all 10% and 90% threshold crossings and then average over all the data. Another approach would be to look up the "signal" package routines for Octave and translate them to numpy/scipy, which I think also should be reasonably straightforward.