Paper Info
Title
A Class-G Supply Modulator and Class-E PA in 130 nm CMOS
Abstract
A class-G supply modulator utilizes parallel low- dropout (LDO) regulators that are controlled by comparators and negative feedback. It optimizes the power consumption of a nonlinear power amplifier (PA) operating with supply modulation, such that it draws current from one of multiple appropriately sized supply voltages as determined by the input signal envelope. The class-G modulator is used in conjunction with a class-E PA operating in an envelope elimination and restoration (EER) mode to efficiently amplify signals with large peak-to-average ratios. The measured maximum output power and power added efficiency (PAE) are 29.3 dBm and 69%, respectively. The class-G technique is demonstrated for a 64 QAM, OFDM input signal (symbol period = 4 mus) wherein the measured error vector magnitude (EVM) is 2.5% and the average efficiency of 22.6%.
Year
DOI
Venue
2009
10.1109/JSSC.2009.2023191
Solid-State Circuits, IEEE Journal of
Keywords
Field
DocType
CMOS analogue integrated circuits,OFDM modulation,modulators,power amplifiers,quadrature amplitude modulation,CMOS,OFDM,QAM,class-E PA,class-G supply modulator,efficiency 22.6 percent,efficiency 69 percent,envelope elimination and restoration mode,error vector magnitude,maximum output power,nonlinear power amplifier,parallel low- dropout regulators,power added efficiency,size 130 nm,supply modulation,time 4 mus,Average efficiency,EER,class-E,class-G,envelope elimination and restoration,linearization,power added efficiency,power amplifier,supply modulation
Comparator,Quadrature amplitude modulation,Computer science,Control theory,Electronic engineering,Modulation,CMOS,Power electronics,Power-added efficiency,Electrical engineering,Voltage regulator,Amplifier
Journal
Volume
Issue
ISSN
44
9
0018-9200
Citations 
PageRank 
References 
34
2.66
8
Authors
3
Name
Order
Citations
PageRank
Jeffrey S. Walling116319.89
Stewart S. Taylor2342.66
David J. Allstot316058.31