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

Volume

24

Issue

8

fYear

2014

fDate

Aug. 2014

Firstpage

533

Lastpage

535

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 (C_out). 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);

fLanguage

English

Journal_Title

Microwave and Wireless Components Letters, IEEE

Publisher

ieee

ISSN

1531-1309

Type

jour

DOI

10.1109/LMWC.2014.2317912

Filename

6868322