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Error in LTSpice Simulation results with Worst-Case Analysis

Question asked by Nagasrinivasa.Kureti on Jun 25, 2018
Latest reply on Jul 5, 2018 by Fil

Hello All,

Good Day...


I have experienced a strange error with LTSpice Simulation results. I am doing the worst-case analysis for few number of runs. Actually the circuit consists of op amp circuit. Whenever the differential input of op amp is more negative then the output shall be low but unfortunately, in some cases even the differential input is more negative but the output shows or stuck at positive.


Herewith I have attached a graph, I have shown the results for three different runs. In that the blue color waveform shows that even the op amp input is negative the output of the op amp is positive where as it is supposed to be zero as in the case of red color waveform condition.


Could you please help me to resolve this issue.


Thanking You in advance.