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Class E-A new class of high-efficiency tuned single-ended switching power amplifiers
Abstract
The new class of amplifiers described is based on a load network synthesized to have a transient response which maximizes power efficiency even if the active device switching times are substantial fractions of the a.c. cycle. The new class of amplifiers, named `Class E,' is defined and is illustrated by a detailed description and a set of design equations for one simple member of the class. For that circuit the authors measured 96 percent transistor efficiency at 3.9 MHz at 26-W output from a pair of Motorola 2N3735 TO-5 transistors. Advantages of Class E are unusually high efficiency, a priori designability, large reduction in second-breakdown stress, low sensitivity to active-device characteristics, and potential for high-efficiency operation at higher frequencies than previously published Class-D circuits.
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Cited by
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Weiland, J. D., Liu, W., & Humayun, M. S. (2005) · Annual Review of Biomedical Engineering · doi:10.1146/annurev.bioeng.7.060804.100435 · Cited by 371
Modeling and optimization of printed spiral coils in air, saline, and muscle tissue environments
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Ali, H., Ahmad, T. J., & Khan, S. A. (2009) · 2009 IEEE Symposium on Industrial Electronics & Applications · doi:10.1109/isiea.2009.5356376 · Cited by 41
Metadata
- Authors
- Sokal, N. O., & Sokal, A. D.
- Venue
- IEEE Journal of Solid-State Circuits
- Published
- 1975-06
- Volume
- 10
- Issue
- 3
- Pages
- 168-176
- ISSN
- 0018-9200 (ISSN-L)
- OpenAlex
- W83868485
- Cited by
- 2,033
- References
- 0
- FWCI
- 9.02
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Class E-A new class of high-efficiency tuned single-ended switching power amplifiers. https://app.cochat.ai/papers/10.1109/jssc.1975.1050582
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- Sokal, N. O., & Sokal, A. D. (1975). Class E-A new class of high-efficiency tuned single-ended switching power amplifiers. IEEE Journal of Solid-State Circuits. https://doi.org/10.1109/jssc.1975.1050582
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
