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How to Calculate Hysteresis using OCEAN/SKILL script

KishoreGunturi

I am trying to write a code that calculates the hysteresis window for my Schmitt trigger /comparator. When I try to get the expression through calculator and "intersect" function it gives a wavefrom and I am not sure how to obtain the co-ordinates fo the waveform. If I can obtain a list/co ordinates I can calculate the hysteresis by just sobtracting the two x-coordinates. I am struggling with this waveform object for a long time and not able to figure out the way. It happens with many functions of calculator that you will end up with waveform whose co-ordinates are not available in list form. Please let me know how to obtain this wave co crdinates in number format lists or something on which I can do some mathmatical processing.

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  • Hi Andrew,

    Thanks for this reply. Although I have been using OCEAN and Skill for a few weeks, I didn't realize that an if statement doesn't execute multiple statements inside the if start and end braces unless you provide a then   e.g. if(condn  exp1 exp2 exp3) would only execute exp1 not exp2 and exp3. But if exp2 and exp3 are simple assignment statements it doesn't show an error, it just doesn't execute them. Today when I used a print() and/or an outfile() statement for exp2/exp3 it started giving errors. This post clarifies the problem. One question if I use if(condn then exp1 exp2 exp3), it should be fine, I do not need to use the else unless I want to, right? 

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  • Hi Andrew,

    Thanks for this reply. Although I have been using OCEAN and Skill for a few weeks, I didn't realize that an if statement doesn't execute multiple statements inside the if start and end braces unless you provide a then   e.g. if(condn  exp1 exp2 exp3) would only execute exp1 not exp2 and exp3. But if exp2 and exp3 are simple assignment statements it doesn't show an error, it just doesn't execute them. Today when I used a print() and/or an outfile() statement for exp2/exp3 it started giving errors. This post clarifies the problem. One question if I use if(condn then exp1 exp2 exp3), it should be fine, I do not need to use the else unless I want to, right? 

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