Proceedings of the 2012 International Symposium on Nonlinear Theory and its Applications


Session Number:C2L-A



A Newton-Type Algorithm for Determining Passive Elements Including in Class-E Amplifiers

Yuichi Tanji,  


Publication Date:

Online ISSN:2188-5079


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A Newton-type algorithm for determining the passive elements including the class-E amplifiers is presented. To ensure the convergence of the Newton method, the initial estimation is efficiently provided by the PSO algorithm, where the responses of class-E amplifiers are approximately expressed in a closed form. It is demonstrated in the numerical example that the proposed method determines the passive elements efficiently.


[1] N. O . Sokal and A. D. Sokal, “Class E-A new class of high-efficiency tuned single-ended switching power amplifiers,” IEEE J. Solid-State Circuits, vol. SSC-10, no.3, pp. 168-176,Jun. 1975.

[2] T. Suetsugu and M. K. Kazimierczuk, “Analysis and design of class E amplifier with shunt capacitance composed of nonlinear and linear capacitances,” IEEE Trans. Circuits Syst. I, vol. 51, no. 7, pp. 1261-1268, Jul. 2004.

[3] H. Sekiya, T. Ezawa, and Y. Tanji, “Design procedure for class E switching circuits allowing implicit circuit equations,” IEEE Trans. Circuits Syst. I, vol. 55, no. 11, pp. 3688-3696, Dec. 2008.

[4] Y. Tanji, H. Matsushita, and H. Sekiya, “Acceleration of PSO for designing class e amplifier,” in Proc. NOLTA’11 , pp. 491-494, Sept. 2011.

[5] R. Poli, J. Kennedy, and T. Blackwell, “Particle swarm optimization - an overview,” Swarm Intell, vol. 1 , pp. 33-57, 2007.