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Audio Engineering Explained by Douglas Self

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PREFACE

 

 

In the third chapter on power amplifiers, which is also taken from my Audio Power Amplifier Design Handbook , I explain in detail the operation and design of Class-G amplifiers. Music has a large peakto- mean level ratio, with the output voltage usually a long way below the peak levels, and this is what makes possible the improved efficiency of Class-G. It is a clever technology that significantly economizes on power consumption and heat dissipation by taking the power for its output stage from low-voltage rails when reproducing small amplitude signals, and switching to high-voltage rails to accommodate the relatively rare signal peaks. Anyone acquainted with electronic design will at once raise an eyebrow at the word “ switching ...

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