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Some features of class DE power amplifier’s load circuit realization improving bandwidth operation

Keywords:

R.I. Zudov – Post-graduate Student, Peter The Great St.Petersburg Polytechnic University. E-mail: ronnwind@gmail.com V.A. Sorotsky – Dr. Sc. (Eng.), Head of Department, Peter The Great St.Petersburg Polytechnic University. E-mail: sorotsky@mail.spbstu.ru


In recent years there has been considerable interest in high efficient power amplifiers operating in class DE. In known publications amplifiers of this type are usually considered at a fixed frequency. The article focuses on the problems associated with bandwidth op-eration of class DE amplifiers and has the aim to increase frequency coefficient under given constraints on the relative change in output power and switching losses. The diagram based method of the load circuit synthesis has been proposed. The results will contribute to the better use of class DE switch amplifiers in radio transmitters and will significantly improve their performance.
References:

 

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  4. Matsuo M., Sekiya H., Suetsugu T., Shinoda K., Mori S. Design of a high-efficiency class DE tuned power oscillator // IEEE Transactions on Circuits and Systems. PartI. 2000. V. 47. № 11. P. 1645−1649.
  5. Koizumi H., Suetsugu T., Fujii M., Shinoda K., Mori S., Ikeda K. Class DE high-efficiency tuned power amplifer // IEEE Transactions on Circuits and Systems. PartI. 1996. V. 43. № 1. P. 51−60.
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