A novel 2.4 GHz CMOS class-E power amplifier with efficient power control for wireless communications

2010 ◽  
Author(s):  
Reza Meshkin ◽  
Alireza Saberkari ◽  
Mohammad Niaboli-Guilani
Keyword(s):  
Wireless Communications ◽  
Power Control ◽  
Power Amplifier ◽  
Efficient Power ◽  
Class E

1.8 GHz class E power amplifier for wireless communications

1996 ◽  
Vol 32 (20) ◽  
pp. 1846 ◽  
Author(s):  
T. Sowlati ◽  
Y. Greshishchev ◽  
C. Andre ◽  
T. Salama
Keyword(s):  
Wireless Communications ◽  
Power Amplifier ◽  
Class E

A 25 dBm Digitally Modulated CMOS Power Amplifier for WCDMA/EDGE/OFDM With Adaptive Digital Predistortion and Efficient Power Control

2009 ◽  
Vol 44 (7) ◽  
pp. 1883-1896 ◽  
Author(s):  
Calogero D. Presti ◽  
Francesco Carrara ◽  
Antonino Scuderi ◽  
Peter M. Asbeck ◽  
Giuseppe Palmisano
Keyword(s):  
Power Control ◽  
Power Amplifier ◽  
Digital Predistortion ◽  
Digitally Modulated ◽  
Efficient Power

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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