MINIMIZING_PHASE_ERROR

Published:2009/7/6 6:48:00 Author:May | From:SeekIC

Phase compensation circuit trimmed by R2 keeps phase error of LM118 opamp well below 1° from DC to 200 kHz. In-phase error due to gain peaking is also low. Feed-forward network connected to pin 8 improves stability, making feedback capacitor unnecessary. Step response has about 30% overshoot, and sine response has about +1 dB of peaking before going 3 dB down at about 2 MHz.-R. A. Pease, Technique Trims Op-Amp Amplifiers for Low Phase Shift, EDN Magazine, Aug.20,1977, p 138.



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