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Below is my Circuit and Voltage Waveforms for the Comparator Circuit. My question is -- In the Highlighted area in the waveform - why is the V(CMP_OUT) not high since inp_u2 (blue) is higher than inp_u1(green) for this interval?

My goal is that CMP_OUT should be high whenever inp_u2 is higher voltage than inp_u1.

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Neil Dey
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  • Your [other question](https://electronics.stackexchange.com/q/415714/95619) looks similarly rushed. Do take time to read the datasheets, instead of jumping to SE to ask a question that will, most likely, need hours to get an answer. It will only help you in the long run. – a concerned citizen Jan 08 '19 at 13:59
  • @aconcernedcitizen Thank you for your feedback. I agree and I will try and improve. – Neil Dey Jan 10 '19 at 00:37

1 Answers1

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The OA does not work if the input is at V-. There are limits to the common mode range.

This old part does not work to V- or Vee or below ground as some do. Therefore connect -V = -0.5 or more.

Or keep Vin+/- >0.5V < Vcc-2

Tony Stewart EE75
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