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Class E high-efficiency power amplifiers, from HF to microwave

Class E high-efficiency power amplifiers, from HF to microwave,10.1109/MWSYM.1998.705187,N. O. Sokal

Class E high-efficiency power amplifiers, from HF to microwave   (Citations: 20)
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Class E power amplifiers achieve significantly higher efficiency than for conventional class B or C. Class E operates the transistor as an on/off switch and shapes the voltage and current waveforms to prevent simultaneous high voltage and high current in the transistor; that minimizes the power dissipation, especially during the switching transitions. In the published low-order class-E circuit, a transistor performs well at frequencies up to about 70% of its frequency of good class-B operation. An unpublished higher-order class E circuit operates well up to about double that frequency. The paper covers circuit operation, explicit design equations for the low-order class E circuit, optimization principles, and experimental results
Conference: Microwave, MTT-S International Symposium - MTT , vol. 2, pp. 1109-1112 vol.2, 1998
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