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OpAmp-Slide29

This is a graph illustrating the phase margin from a datasheet. Phase margin is the distance between the phase angle and the 180 degree mark at unity gain (or 0dB). If the phase margin decreases below 30 degrees, it is likely that the op amp will have a lot of overshoot. Many op amps datasheets will also plot phase margin over a range of temperatures.

PTM Published on: 2009-01-26