Computation of design values for Class E amplifiers without using waveform equations

Sekiya, Hiroo; Sasase, Iwao; Mori, Susumu

doi:10.1109/tcsi.2002.800474

Cited by 72 publications

(28 citation statements)

References 22 publications

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“…Circuit simulator, however, is not always suitable for every purpose. For example, circuit simulator is expensive for optimization of passive elements [8,9] which requires repeated simulations to evaluate fitness of design variables. Monte Carlo simulation using circuit simulator is also expensive [11].…”

Section: Class-e Switching-mode Circuitsmentioning

confidence: 99%

“…However, simulations need to be run repeatedly to know the performances such as power conversion efficiency, ripple, and ZVS or ZDS condition depending on the design parameters. Moreover, direct use of such simulators is not suitable for design schemes based on an optimization algorithm [8,9,16]. Therefore, an effective model that simulates the steady state behavior of Class-E amplifier is required.…”

Section: Introductionmentioning

confidence: 99%

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Behavioral modeling of Class-E switching circuits via Weierstrass canonical form

Tanji

Kamei

2017

NOLTA

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Abstract:With the behavioral models of Class-E switching-mode circuits, we can simulate the steady state behaviors of original circuits efficiently. However, if the dynamical systems, which approximate the behaviors of the original circuits, include impulse modes, the behavioral models cannot be easily obtained. In this paper, we show that the behavioral models are given by using Weierstrass canonical form, even if impulse modes happen. Since the proposed method is quite general, this procedures would be widely applied to behavioral modeling of various kinds of power converters. We demonstrate effectiveness of the proposed models with some examples.

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Section: Class-e Switching-mode Circuitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Behavioral modeling of Class-E switching circuits via Weierstrass canonical form

Tanji

Kamei

2017

NOLTA

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“…The shooting method provided in the previous section is incorporated into the design of the Class E amplifier [2]. A topology of basic class E amplifier is shown in Fig.…”

Section: Optimization Procedures Of Class E Amplifiermentioning

confidence: 99%

“…On the other hand, it is difficult to design a Class E amplifier on an integrated circuit, where the designers have to adjust the passive elements including the circuit and the device parameters of transistor in order to minimize the switching losses. To overcome its difficulty, an optimization procedure based on a technique for analyzing the nonlinear phenomena occurring in circuits is proposed in [2]. In this method, the Class E amplifiers are idealized by two linear circuits on the on/off state of the transistor switch and the passive elements are determined so that the requirements as Class E amplifier are satisfied.…”

Section: Introductionmentioning

confidence: 99%

Optimization procedure of class E amplifiers using SPICE

Tanji

Sekiya

Asai

Proceedings of the 2005 European Conference on Circuit Theory and Design, 2005.

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-Class E amplifiers are known as a switching type power amplifier and a good candidate for fully integrated CMOS transceivers which are used for Global System for Mobile Communication and Bluetooth. However, the design of Class E amplifiers is difficult, because the passive elements and the device parameters of CMOS switch must be optimized so that the switching losses are minimized. In this paper, an optimization procedure of Class E amplifiers is proposed, where all the design parameters are automatically assigned repeating the SPICE transient analysis. In the numerical examples, the proposed procedure is demonstrated using the Berkeley SPICE.

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“…Thus, the waveforms of I1 and vC 1 should resemble those of I2 and vC 2 , respectively, but with a phase shift of ωT /2, i.e., π. The parallel resonant tank is then driven by a nearly sinusoidal voltage given by vT = vC 1 − vC 2 .…”

Section: Principle Of Operationmentioning

confidence: 99%

Optimum Design of Very Low Distortion Class E Power Amplifiers

Wong

Tse

2005 IEEE International Symposium on Circuits and Systems

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Abstract-In this paper1 the optimum design of a class E power amplifier with resonant tank being symmetrically driven by two class E circuits is studied. The optimally designed symmetrical class E circuit has extremely low harmonic distortion, and the load matching network (if required) is non-critical and can be designed with ease. Practical steady-state design equations are derived and graphically presented. Experimental circuits are constructed for distortion evaluation.

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Computation of design values for Class E amplifiers without using waveform equations

Cited by 72 publications

References 22 publications

Behavioral modeling of Class-E switching circuits via Weierstrass canonical form

Behavioral modeling of Class-E switching circuits via Weierstrass canonical form

Optimization procedure of class E amplifiers using SPICE

Optimum Design of Very Low Distortion Class E Power Amplifiers

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