May,
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I don't know if we will see your updated file with the missing LTspice symbol, or if you consider the problem to be solved already.
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But I want to mention that your signals HCF and LCF did not look right.? In contrast with the other two pairs which have no overlap, the HCF and LCF pair have tons of overlap.? I think maybe you forgot to invert one of them.? Maybe that is correct, but it looks funny when compared with the other two pairs.
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Andy
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