EMC; test pulse according to ISO 7637-2

[harry456]

Hi, Is there a way to get the puls according to ISO 7637-2 into spice?
(https://www.mem.com.tw/article_content.asp?sn=1206060007)
The problem is there are no formulas given that describes the pulse and the four points are not enough to create a them via pwr.
thx

 

[FvM]

The full pulse specification is given in standard text. You'll notice that tr and td are not drawn to scale in the principle waveform. The smoothed waveform illustrates that the authors primarly thought of an RC circuit generating the pulse. Nevertheless any wavefom that keeps the specified timing should be acceptable. In so far it's up to you to either design a suitable generator circuit or use a tabulated waveform. Or any combination of it, e.g. a simple pulse smoothed by a low-pass filter.