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How to find all the crossing of the signal

wgtkan

I used the cross function to get all the crossings and plot the waveform. But it didn’t display all the crossings.

 

I am trying to plot pulse vs temperature. This is what I have done. I performed a transient simulation in ADEL by specifying the stop time to 400ns.

 

Then did a parametric simulation of temperature for from -50C to 125C linear step size of 10C. It gave me the transient response at the specified temperatures.

I used the cross function to return the plot of the pulse vs temperature. The plot doesn’t look correct because it only gave me part of the time. It didn’t give me the whole pulse rang from (0-400ns)

How do plot the whole time vs temperature. (0-400ns) vs -50 to 125C

I am attaching the plot with this question.

 

 

Here is the argument that I gave to the cross function.

My output signal VT(“/Pout”)

Threshold value: 0.75

Edge number: 2

Edge Type: either

Number of Occurrences: Single I tried multiple also but it plot time vs time.

Plot/print vs: time

 

My understanding is that the cross function returns the x value where a signal crosses the threshold y value.

Thank you.

Parents

  • Dear wgtkan,


    The expression for the cross() function shown above your plot of its result is for a single waveform crossing. Hence, the y-axis is limited to the maximum initial crossing of your signal. You noted that you also tried multiple crossings. What expression did you try? I use the cross() function extensively. A typical multiple crossing use of the cross() function to obtain the x-crossing values about a 0.0 thrreshold  as a function of the waveform cycle is:

    cross(hsclki_clipped 0 0 "rising" t "cycle")


    where "hsclki_clipped" is a clipped waveform.

    Shawn

Reply

  • Dear wgtkan,


    The expression for the cross() function shown above your plot of its result is for a single waveform crossing. Hence, the y-axis is limited to the maximum initial crossing of your signal. You noted that you also tried multiple crossings. What expression did you try? I use the cross() function extensively. A typical multiple crossing use of the cross() function to obtain the x-crossing values about a 0.0 thrreshold  as a function of the waveform cycle is:

    cross(hsclki_clipped 0 0 "rising" t "cycle")


    where "hsclki_clipped" is a clipped waveform.

    Shawn

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