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Negative group delay

Yes, it does look unusual. And I can't explain it. It almost looks like a sign error. If you invert the Y-axis of the phase plot, then it would match with the bandpass response shown in the magnitude plot. Off the top of my head, I can't think of a filter topology that would produce a bandpass response and have a negative group delay through the low pass and high pass transitions.

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  • Negative group delay - Dave_K 10:49:36 09/14/15 (0)


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