A Low Distortion Highly Stable Class AB Output Stage for Monolithic Power Amplifiers

A new low distortion, highly stable class AB output stage intended for monolithic power amplifiers is described. High linearity is obtained through use of a new technique of class AB biasing combined with local feedback. Stability is improved by eliminating the customary quasi-PNP structure and the application of high-frequency feedforward. Measured THD is around -80 dB at 20 kHz.

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