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Linear CMOS RF Power Amplifiers for Wireless Applications pp 5–16Cite as

Efficiency Enhancement

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Part of the book series: Analog Circuits and Signal Processing ((ACSP))

Abstract

This chapter presents some basic principles of RF power amplifiers, mainly dealing with the linearity–efficiency trade-off, to prepare the reader for the design of a dynamic supply CMOS RF power amplifier, subject of the next chapter. It also surveys the main efficiency-enhancement techniques found in the literature to establish a basis for comparison with the results presented in Chap. 4

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Notes

  1. 1.

    But care should be taken to respect spurious emission limits.

  2. 2.

    Single-sideband signals have both amplitude and phase modulation and, hence, require linear amplification.

  3. 3.

    In [9], there is actually the elimination and restoration of the envelope. In [28], the author further separates polar transmitters in those using polar modulation prior to the PA and those using polar modulation with open-loop PA amplitude control.

  4. 4.

    IS-95—Interim Standard 95 (CDMA).

  5. 5.

    ACLR and ACPR are different names for the same linearity measurement.

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Authors and Affiliations

  1. École Polytechnique Fédérale de Lausanne (EPFL), 1015, Lausanne, Switzerland

    Dr. Paulo Augusto Dal Fabbro & Prof. Maher Kayal

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  1. Dr. Paulo Augusto Dal Fabbro
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  2. Prof. Maher Kayal
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Correspondence to Paulo Augusto Dal Fabbro .

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Dal Fabbro, P.A., Kayal, M. (2010). Efficiency Enhancement. In: Linear CMOS RF Power Amplifiers for Wireless Applications. Analog Circuits and Signal Processing. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-9361-5_2

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  • DOI: https://doi.org/10.1007/978-90-481-9361-5_2

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