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These charts show the impact of adding compensation. The previous bode plot has shown that the phase margin is 15°. As mentioned on the previous slide, the error amplifier shown will cause a 180° phase shift, but is not shown in the plot. Z1 and Z2 form the compensation, which can be seen in the closed loop response plot, to improve the phase margin to over 60°.
PTM Published on: 2011-09-27
