Problem 2 -- What does "less negative" mean?
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Problem 2 asks you to find a transfer function that has a phase that is "less negative" than P(s). When plotting P(s) you should use the typical convention of having the phase at zero frequency be between 0 and -360 degrees. Matlab's bode command doesn't always follow this convention, but you think about shifting the phase plot by 360 degrees.
--Mary Dunlop 12:55, 26 November 2006 (PST)