Design of Class E Amplifier With Nonlinear and Linear Shunt Capacitances for Any Duty Cycle

Mediano, Arturo; Molina-Gaudo, P.; Bernal, Carlos

doi:10.1109/tmtt.2006.890512

Cited by 74 publications

(39 citation statements)

References 11 publications

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“…Since invention of Class-E amplifier, many analytical descriptions have been presented [1][2][3][4][5][6][7]. Early designs assumed ideal switch, infinite output network Q, and RF choke in the DC supply [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Early designs assumed ideal switch, infinite output network Q, and RF choke in the DC supply [1,2]. Later work allowed finite output Q [3][4][5], drain current fall time [5], and nonlinear parasitic capacitance on the active device [6,7]. Although these treatments give useful guidance in the design of Class-E amplifiers, the behaviors in the steady state cannot be fully known.…”

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: Introductionmentioning

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 zerovoltage-switching (ZVS) and zero-derivative-switching (ZDS) conditions are satisfied, which ensure zero switching loss and improve component tolerances [8,9]. Furthermore, in order to design an accurate power amplifier circuit, it is necessary to consider adequately the frequency limitation of an active device.…”

Section: Introductionmentioning

confidence: 99%

Frequency limitation of an optimum performance class-E power amplifier

Ha‐Van

Dang-Duy

Kim

et al. 2016

IEICE Electron. Express

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Class-E power amplifiers have found widespread application because of their design simplicity and high-efficiency operation. The nonlinear characteristic of the switching device significantly affects the power amplifier performance, although this is often neglected in theoretical analyses. In this paper, a class-E power amplifier with a shunt capacitance composed of nonlinear and linear capacitance has been mathematically analyzed to obtain the frequency limitation that governs maximum efficiency operation. The analytical method is presented to determine the effective operating frequency for any model of MOSFET device. The practical power amplifier circuit, using a MRF282 MOSFET, was implemented to verify the validity of the theoretical analysis.

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“…The numerical analysis of the design equation determined by a program constructed in MATLAB is more exact than the value provided by the table and figures. For this work, the class-E power amplifier circuit was analyzed and designed by relying on the composition of the nonlinear and linear shunt capacitances to satisfy the zero-voltage switching (ZVS) and the zero-voltage-derivative switching (ZVDS) conditions, which ensure zero switching loss and low noise and improve component tolerances [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

Design of a Highly Efficient Broadband Class-E Power Amplifier with a Low Q Series Resonance

Dang-Duy¹,

Ha‐Van²,

Kim³

et al. 2016

Journal of electromagnetic engineering and science

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This work presents a method used for designing a broadband class-E power amplifier that combines the two techniques of a nonlinear shunt capacitance and a low quality factor of a series resonator. The nonlinear shunt capacitance theory accurately extracts the value of class-E components. In addition, the quality factor of the series resonator was considered to obtain a wide bandwidth for the power amplifiers. The purpose of using this method was to produce a simple topology and a high efficiency, which are two outstanding features of a class-E power amplifier. The experimental results show that a design was created using from a 130 to 180 MHz frequency with a bandwidth of 32% and a peak measured power added efficiency of 84.8%. This prototype uses an MRF282SR1 MOSFET transistor at a 3-W output power level. Furthermore, a summary of the experimental results compared with other high-efficiency articles is provided to validate the advantages of this method.Key Words: Broadband, Class-E Amplifier, High PAE, Nonlinear Capacitance. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/ by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. ⓒ

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Design of Class E Amplifier With Nonlinear and Linear Shunt Capacitances for Any Duty Cycle

Cited by 74 publications

References 11 publications

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

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

Frequency limitation of an optimum performance class-E power amplifier

Design of a Highly Efficient Broadband Class-E Power Amplifier with a Low Q Series Resonance

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