Title :
Fully Integrated CMOS Saturated Power Amplifier With Simple Digital Predistortion
Author :
Yunsung Cho ; Juyeon Lee ; Sangsu Jin ; Byungjoon Park ; Junghwan Moon ; Jooseung Kim ; Bumman Kim
Author_Institution :
Div. of IT Convergence Eng., POSTECH, Pohang, South Korea
Abstract :
A highly efficient CMOS saturated power amplifier (PA) is implemented. The efficiency is enhanced by the voltage waveform engineering using the second harmonic component generated by the nonlinear output capacitor (Cout). For an improved linearity to satisfy the specification of handset applications, a simple open-loop digital predisortion algorithm is employed. The fully integrated single-stage differential PA including the output transformer is fabricated using a 0.18- μm CMOS process. The PA with 3.5 V supply delivers good performance across the 1.7-2.0 GHz frequency band.
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF power amplifiers; differential amplifiers; frequency 1.7 GHz to 2.0 GHz; fully integrated CMOS saturated power amplifier; fully integrated single-stage differential PA; handset applications; nonlinear output capacitor; open-loop digital predisortion algorithm; second harmonic component; size 0.18 mum; voltage 3.5 V; voltage waveform engineering; CMOS integrated circuits; Harmonic analysis; Linearity; Multiaccess communication; Power generation; Power measurement; Telephone sets; Efficiency; linearity; power amplifier (PA); predistortion (PD); wideband code division multiple access (WCDMA);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2014.2317912
