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In this paper, we show the generalized method of the time-domain circuit simulation based on LIM. First, the formulation of the circuit for LIM is modified and generalized. Furthermore, the modified simulation algorithm is suggested. As a result, our method is applicable to any structure of circuits. Some example circuits are simulated and the proposed method is compared with the conventional ones, in order to show the validity and efficiency of our method.

The class-E amplifier is one of the switching amplifiers, which satisfies the class-E switching conditions. It is, however, difficult to determine the values of the passive elements included in the circuit for achieving the class-E switching conditions. The particle swarm optimization algorithm for designing the class-E amplifier is presented in this paper. To reduce the computational cost and consider the nonlinear effects of MOSFET in the amplifier, a circuit simulator which finds the steady-state solution is introduced. Moreover, OpenMP, which is an API for multi-platform shared-memory parallel programming, is used in the developed program to accelerate the proposed procedure. In a design example, the class-E amplifier, the element values of which were obtained by the particle swarm optimization, showed a good performance.

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The passive approximation of tabulated frequencydata for modeling package, PCB, and integrated circuits is presented. The macromodels in the Laplace-domain are directly obtained by the Fourier series approximation of the frequencydata and are represented using a Laguerre basis. The rigorous proof of passivity preservation associated with the proposed models is provided.