scholarly journals SWITCHING-MODE CMOS POWER AMPLIFIER USING A DIFFERENTIALLY COUPLED SERIES INDUCTOR

2019 ◽  
Vol 81 ◽  
pp. 59-64
Author(s):  
Changhyun Lee ◽  
Changkun Park
Keyword(s):  
Power Amplifier ◽  
Switching Mode ◽  
Series Inductor

Design methodology for a switching-mode RF CMOS power amplifier with an output transformer

2015 ◽  
Vol 8 (3) ◽  
pp. 471-477
Author(s):  
Changhyun Lee ◽  
Changkun Park
Keyword(s):  
Output Power ◽  
Power Amplifier ◽  
Design Methodology ◽  
Supply Voltage ◽  
Cmos Technology ◽  
Rf Cmos ◽  
Power Transistor ◽  
Voltage Output ◽  
Switching Mode ◽  
Output Transformer

In this study, we propose a design methodology for a switching-mode RF CMOS power amplifier with an output transformer. For a given supply voltage, output power, and target efficiency, the initial values of the transistor size, output inductance, and capacitance can be sequentially determined during the design of the power amplifier. The breakdown voltage of the power transistor is considered in the design methodology. To prove the feasibility of the proposed design methodology, we provide the design example of a 2.4-GHz switching-mode CMOS power amplifier with 180-nm RF CMOS technology. From the measured results, the feasibility of the proposed design methodology is proved.

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 Accurate large-signal FET model tailored for switching-mode power amplifier design

2010 ◽  
Vol 7 (22) ◽  
pp. 1672-1678
Author(s):  
Lin-Sheng Liu ◽  
Jian-Guo Ma ◽  
Geok-Ing Ng
Keyword(s):  
Power Amplifier ◽  
Large Signal ◽  
Amplifier Design ◽  
Switching Mode

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). 

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