How to get continuous time display for oscilloscope?

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Will Banks 2023-2-11

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https://ww2.mathworks.cn/matlabcentral/answers/1910960-how-to-get-continuous-time-display-for-oscilloscope

编辑： Will Banks 2023-2-17

I searched already and couldn't find an answer.

I have a circuit that generates a ramp wave. The circuit works on other simulation software, and it works in real life as I've built it before.

When I attach a probe to the output, I get a DC signal. I am assuming that the scope takes a snapshot for something that it thinks is DC, and a time axis if it detects a dedicated AC signal.

Does anyone see anything wrong with the parameters I have specified? cap=2.2nF, R=1k.

The voltage follower simply copies the signal to ensure there is no short to ground.

Thanks fellas, ya'll are baller.

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Sabin 2023-2-14

Could you attach the model rather than the print screen? Will be easier to investigate as we don't have all the information.

Will Banks 2023-2-14

sawtooth_errors.slx

yes, here you go. thank you

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回答（1 个）

Joel Van Sickel 2023-2-16

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Looking at this circuit, shouldn't it require an inverting trigger to work correctly?

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Joel Van Sickel 2023-2-17

编辑：Joel Van Sickel 2023-2-17

I'd be interested to see why the not gate doesn't work, but let's assume that won't work based on what you've seen, so you could feed the original signal into a not gate, and then feed the not gate results into the schmitt trigger, essentially creating your own inverting schmitt trigger.

I tried parameterizing the schmitt trigger as if it were inverting, and it wouldn't let me, which would have been a nice alternative.

You could also try and find a spice model of the trigger you used and use the subcircut2ssc command to import that into simscape.

Will Banks 2023-2-17