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Erschienen in:
2008 | OriginalPaper | Buchkapitel
Power Amplifiers
verfasst von : Dr.-Ing. Ulrich Tietze, Dr.-Ing. Christoph Schenk, Dr.-Ing. Eberhard Gamm
Erschienen in: Electronic Circuits
Verlag: Springer Berlin Heidelberg
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Power amplifiers are designed to provide large output powers, with the voltage gain playing only a minor role. Normally, the voltage gain of a power output stage is near unity and the power gain is thus mainly due to the current gain of the circuit. The output voltage and current must be able to assume positive and negative values. Power amplifiers with unidirectional output current are known as power supplies. They are discussed in Chap. 16.