Title :
A switched-capacitor power amplifier for EER/polar transmitters
Author :
Yoo, Sang-Min ; Walling, Jeffrey S. ; Woo, Eum Chan ; Allstot, David J.
Author_Institution :
Univ. of Washington, Seattle, WA, USA
Abstract :
This paper introduces an EER 90 nm CMOS experimental prototype switched capacitor power amplifier (SCPA) that achieves high output power, efficiency and linear output-power control using a switched-capacitor-based switching PA without the use of a supply modulator. While amplifying 64-QAM OFDM modulation with a 20 MHz signal bandwidth it achieves an average output power of 17.7 dBm, an average PAE of 32.1%, and an EVM of 2.9%.
Keywords :
CMOS analogue integrated circuits; power amplifiers; pulse amplitude modulation; quadrature amplitude modulation; radio transmitters; radiofrequency amplifiers; switched capacitor networks; 64-QAM OFDM modulation; CMOS experimental prototype; EER-polar transmitters; bandwidth 20 MHz; efficiency 32.1 percent; envelope elimination and restoration transmitters; linear output-power control; signal bandwidth; size 90 nm; supply modulator; switched-capacitor power amplifier; CMOS integrated circuits; Capacitors; Linearity; Modulation; Power amplifiers; Power generation; Switches;
Conference_Titel :
Solid-State Circuits Conference Digest of Technical Papers (ISSCC), 2011 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
978-1-61284-303-2
DOI :
10.1109/ISSCC.2011.5746382
