Once again, you sir, have proven yourself to have one of the most ironic screen names on RU-vid. Oh and, great job on the video too! I look forward to trying out your design procedure!
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Thank you for a very in-depth and useful analysis of the hysteresis in comparator circuits! I prefer to calculate threshold values in electrical schemes for my devices always with some small hysteresis. Your video gives very good step by step algorithm for hysteresis calculations.
Dang it. You are right. Thanks so much for finding that. I’m not going to redo the video for that. I’ll probably just note it in the description. Can I credit you for finding it?
Ringing generally refers to a oscillatory voltage waveform that is caused by LC resonances in a circuit during switching. It also occurs when a feedback control system (like an opamp) is given a step response input and the output rings due to lack of phase margin. In the case of the comparator without hysteresis, the fast acting comparator is simply switching states between the noise voltage being higher or lower than the reference voltage. It's doing its job but the output is often undesirable. That's why I chose to call it chatter. I hope that helps.
"Don't use subjective arbitrary numbers! Use this method, which sometimes recommends 400M resistors, and then arbitrarily adjust it to a value you subjectively think is reasonable" Since most times the bias current is basically negligible, why not design around sensible power draws to ground instead? Perhaps some ratio of the comparator's quiescent power/current to begin with.
Yes, I know. This method really only applies to comparators with a higher range of input bias currents. A ratio of the comparator's quiescent current makes sense. Thanks for the comment.
