Wideband and efficient watt-level SiGe BiCMOS switching mode power amplifier using continuous class-E modes theory

2014 ◽  
Author(s):  
Mustafa Ozen ◽  
Mustafa Acar ◽  
Mark P. van der Heijden ◽  
Melina Apostolidou ◽  
Domine M. W. Leenaerts ◽  
...  
Keyword(s):  
Power Amplifier ◽  
Sige Bicmos ◽  
Switching Mode ◽  
Class E

scholarly journals Class-E Amplifier Design Improvements for GSM Frequencies

2011 ◽  
Vol 7 (2) ◽  
pp. 74 ◽  
Author(s):  
Z. Nadir ◽  
F. Touati
Keyword(s):  
Power Amplifier ◽  
Mobile Communications ◽  
Power Amplifiers ◽  
Mobile Systems ◽  
Constant Envelope ◽  
Amplifier Design ◽  
Mobile Phone System ◽  
Switching Mode ◽  
Efficient Power ◽  
Class E

 Efficient power amplifiers are essential in portable battery-operated systems such as mobile phones. Also, the power amplifier (PA) is the most power-consuming building block in the transmitter of a portable system. This paper investigates how the efficiency of the power amplifier (which is beneficial for multiple applications in communcation sector) can be improved by increasing the efficiency of switching mode class E power amplifiers for frequencies of 900 MHz and 1800 MHz. The paper tackles modeling, design improvements and verification through simulation for higher efficiencies. This is the continuation of previous work by the authors. These nonlinear power amplifiers can only amplify constant-envelope RF signals without introducing significant distortion. Mobile systems such as Advanced Mobile Phone System (AMPS) and Global System for Mobile communications (GSM) use modulation schemes which generate constant amplitude RF outputs in order to use efficient but nonlinear power amplifiers. Improvements in designs are suggested and higher efficiencies are achieved, to the tune of 67.1% (for 900 MHz) and 67.0% (1800 MHz). 

A 3.5 GHz hybrid CMOS class E power amplifier with reverse body bias design for 5G applications

2021 ◽  
Author(s):  
Ahmad Fariz Hasan ◽  
Sohiful Anuar Zainol Murad ◽  
Faizah Abu Bakar
Keyword(s):  
Power Amplifier ◽  
Hybrid Cmos ◽  
Class E ◽  
Body Bias

scholarly journals Design of the Class-E Power Amplifier with Finite DC Feed Inductance under Maximum-Rating Constraints

2021 ◽  
Vol 11 (9) ◽  
pp. 3727
Author(s):  
Ingrid Casallas ◽  
Carlos-Ivan Paez-Rueda ◽  
Gabriel Perilla ◽  
Manuel Pérez ◽  
Arturo Fajardo
Keyword(s):  
Quality Factor ◽  
Power Amplifier ◽  
Wide Spectrum ◽  
Circuit Simulation ◽  
Percentage Error ◽  
Resonant Circuit ◽  
Mean Square ◽  
Peak Voltage ◽  
Supply Current ◽  
Class E

This paper proposes an analytical expression set to determine the maximum values of currents and voltages in the Class-E Power Amplifier (PA) with Finite DC-Feed Inductance (FDI) under the following assumptions—ideal components (e.g., inductors and capacitors with infinite quality factor), a switch with zero rise and fall commutation times, zero on-resistance, and infinite off-resistance, and an infinite loaded quality factor of the output resonant circuit. The developed expressions are the average supply current, the RMS (Root Mean Square) current through the DC-feed inductance, the peak voltage and current in the switch, the RMS current through the switch, the peak voltages of the output resonant circuit, and the peak voltage and current in the PA load. These equations were obtained from the circuit analysis of this ideal amplifier and curve-fitting tools. Furthermore, the proposed expressions are a useful tool to estimate the maximum ratings of the amplifier components. The accuracy of the expressions was analyzed by the circuit simulation of twelve ideal amplifiers, which were designed to meet a wide spectrum of application scenarios. The resulting Mean Absolute Percentage Error (MAPE) of the maximum-rating constraints estimation was 2.64%.

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