High-efficiency class-A power amplifiers with a dual-bias-control scheme

Yang, Kyounghoon; Haddad, G.I.; East, J.R.

doi:10.1109/22.780390

Cited by 41 publications

(5 citation statements)

References 20 publications

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“…As a result, the output transistor's average power consumption falls and its efficiency rises. It's worth noting that the above change has no effect on the signal's harmonic content when delivered to the load [18]. The method only use various ports impedances for various harmonics to allow the output voltage from drain to approximate a square signal.…”

Section: Harmonic Enhancement Class Amentioning

confidence: 99%

A Classification and Comparative Overview of CMOS Radio-Frequency Power Amplifiers

Eid,

Ibrahim,

Abouelnaga

2023

Industrial Technology Journal

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This paper presents a comprehensive classification and comparative overview of CMOS radio-frequency (RF) power amplifiers (PAs) and proposes novel insights into their design and applications. Our research focuses on the significance of RF CMOS power amplifiers in contemporary communication systems, specifically their role in enabling the advancements of emerging technologies such as 5G. We delve into the various RF CMOS power amplifier classes, including linear PA classes (A, AB, B, and C) and switching PAs (Class D, Class E, and Class F). By evaluating essential performance metrics such as output power (P_out), drain efficiency (DE), and power-added efficiency (PAE), we provide a thorough understanding of the operational principles and distinct characteristics of each class. This comparative analysis offers a range of options to meet specific requirements and ensures seamless signal transmission in modern communication systems. With a particular emphasis on the demands of 5G networks for high-speed and high-capacity wireless communication, we emphasize the importance of these power amplifiers in achieving reliable and efficient connectivity. Our research contributes to the advancement of RF CMOS power amplifier design and offers valuable insights for the development of future communication systems.

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Section: Harmonic Enhancement Class Amentioning

confidence: 99%

A Classification and Comparative Overview of CMOS Radio-Frequency Power Amplifiers

Eid,

Ibrahim,

Abouelnaga

2023

Industrial Technology Journal

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“…The class-A amplifier is well-known the most linear among all linear counterparts. However, its power efficiency is very challenging [2,4]. There are three configurations of transistor-based class-A amplifier circuit: common-emitter, common-base, and common-collector.…”

Section: Class-a Amplifier-based Linear Current Generatormentioning

confidence: 99%

“…By contrast, linear power amplifiers such as class-A, class-AB, or class-D can generate a pure sinusoidal waveform with very low noise. However, poor power conversion efficiency is their main issue, so that they are not suitable for power inverters [2][3][4]. The primary goal when constructing a power inverter is generating pure sinusoidal waveform with very low output harmonics without forfeiting the power efficiency [1].…”

Section: Introductionmentioning

confidence: 99%

Pure Sinusoidal Output Single-Phase Current-Source Inverter with Minimized Switching Losses and Reduced Output Filter Size

Priandana

Noguchi

2019

Electronics

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This paper proposes a novel single-phase current-source inverter that generates a pure sinusoidal waveform with minimized switching losses and using a small-size output filter capacitor. The proposed method is investigated by incorporating a conventional multilevel current-source inverter with a linear amplifier. The conventional multilevel technique uses fundamental switching frequency instead of using high-switching frequency modulation for the H-bridge circuit. The linear amplifier such as class-A or class-D types has a function to reform the staircase waveform generated by the multilevel inverter into a pure sinusoidal by using superimposition technique. As a result, pure sinusoidal output current is generated with a small ripple and the system only requires a small output filter capacitor for smoothing the waveform. Based on the simulation and experimental results, the proposed system presents not only the optimal configuration, but also an option as to whether to obtain excellent power efficiency or very low output harmonic. Implications of the results and future research directions are also presented.

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“…By extending the same principle to the gate/base, a procedure known as dynamic biasing (DB), the power-added efficiency (PAE) can be doubled for transistors operating in class-A/AB mode [2]. Nevertheless, the high supply current at the collector/drain limits the bandwidth of the voltage that the DC/DC converter can efficiently generate [3], a constraint which affects both ET and DB.…”

Section: Introductionmentioning

confidence: 99%

“…The peak-to-average power ratio (PAPR) of the RF signal is therefore enlarged [1], causing severe DC power losses at the power amplifier (PA) end. The reason is that class-A/AB amplifiers, while still attractive because of their linear behavior [2], are only efficient when the input power is near its peak level.…”

Section: Introductionmentioning

confidence: 99%

First and second order polynomial functions for bandwidth reduction of dynamic biasing signals

Miranda

Olavsbraten

Gjertsen³

et al. 2010

2010 IEEE International Conference on Wireless Information Technology and Systems

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High-efficiency class-A power amplifiers with a dual-bias-control scheme

Cited by 41 publications

References 20 publications

A Classification and Comparative Overview of CMOS Radio-Frequency Power Amplifiers

A Classification and Comparative Overview of CMOS Radio-Frequency Power Amplifiers

Pure Sinusoidal Output Single-Phase Current-Source Inverter with Minimized Switching Losses and Reduced Output Filter Size

First and second order polynomial functions for bandwidth reduction of dynamic biasing signals

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