An exact analysis of Class-DE amplifier at any output Q

Albulet, Mihai

doi:10.1109/81.795836

Cited by 46 publications

(7 citation statements)

References 12 publications

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“…For optimum working conditions, the valley must be placed exactly at the The author concluded that, unlike a class E amplifier, it is nearly impossible for a class DE amplifier to achieve very precise switching operations with real components. The practical range of D is between 0.25 and 0.33 [19]. In addition, the optimum point of class DE power amplifier does not occur at maximum output or input [19].…”

Section: Class De Amplifiermentioning

confidence: 99%

“…• The switch-on duty ratio (D) is exactly one quarter of a period of the operating frequency [5], [19], [20]. Variable D is the ratio of switch's conducting time to its period of working frequency: D = T on T .…”

Section: Class De Amplifiermentioning

confidence: 99%

“…implied that φ can be adjusted by series capacitance C s1 and inductance L s1 [19] in Figure 4 In Figure 4.7(a), the half U-shape is the valley of a sinusoidal waveform where its amplitude reached minimum. For optimum working conditions, the valley must be placed exactly at the The author concluded that, unlike a class E amplifier, it is nearly impossible for a class DE amplifier to achieve very precise switching operations with real components.…”

Section: Class De Amplifiermentioning

confidence: 99%

See 2 more Smart Citations

An integrated ultrasound transducer driver for HIFU applications

Wong

Christoffersen

Pichardo

et al. 2013

2013 26th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

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Section: Class De Amplifiermentioning

confidence: 99%

Section: Class De Amplifiermentioning

confidence: 99%

Section: Class De Amplifiermentioning

confidence: 99%

See 1 more Smart Citation

An integrated ultrasound transducer driver for HIFU applications

Wong

Christoffersen

Pichardo

et al. 2013

2013 26th IEEE Canadian Conference on Electrical and Computer Engineering (CCECE)

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“…In contrast, low quality factor circuits are appropriate for applications in which the harmonic suppression of the output is not important. Typical applications include highefficiency DC/DC converters; a radio-frequency energy supplies for heating, for the generation of plasmas, arcs, or sparks, and for communication jamming; or input drivers of a higher power stage [6]. In designing the class-E, the high quality factor of a resonant network has a limited frequency response.…”

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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“…It has been pointed out that these patterns form various waveforms which include harmonics and low frequency components. In this paper, an analysis of Class D inverter with irregular driving patterns is carried out with numerical calculation method [1]. The waveforms are compared with circuit experiments.…”

Section: Introductionmentioning

confidence: 99%

Analysis of class D inverter with irregular driving patterns

Koizumi

Kurokawa

Mori

2004 IEEE International Symposium on Circuits and Systems (IEEE Cat. No.04CH37512)

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This paper presents an analysis of Class D inverter when irregular driving patterns are given to the gate drive of the switch devices. The analysis has been carried out with focusing on the waveforms, harmonics, low frequency components, and equivalent dc resistance, which are numerically analyzed and discussed. Appropriate patterns are sorted based on the calculation results. The waveforms are compared to the circuit experiments. These results corresponded with the calculation. Analytical results show a possibility of a novel control method with irregular driving patterns. In spite of discontinuous control, the output power or voltage can be strictly changed using the selected driving patterns.

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An exact analysis of Class-DE amplifier at any output Q

Cited by 46 publications

References 12 publications

An integrated ultrasound transducer driver for HIFU applications

An integrated ultrasound transducer driver for HIFU applications

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

Analysis of class D inverter with irregular driving patterns

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