Self on Audio, 3rd Edition

Chapter 28Distortion in power amplifiers

Part VII: frequency compensation and real designs (Electronics World, February 1994)

This crowded article attempted to deal with the extensive subject of compensation for stability, to showcase a complete 50W/8Ω power amplifier, and demonstrate the distortion performance of that amplifier with various compensation schemes. It was difficult to pack everything in, as the eighth and final article of the series was reserved for Class-A, and perhaps inevitably, there were a few rough edges.

The first section on dominant pole compensation was of course written before the role of the nonlinear Cbc had been properly explored. (See Chapter 24.) I say in the article that the added Miller capacitor swamps the effect ...