Title :
A 2.4 GHz fully integrated Doherty power amplifier using series combining transformer
Author :
Kaymaksüt, Ercan ; Reynaert, Patrick
Author_Institution :
ESAT-MICAS, Katholieke Univ. Leuven, Leuven, Belgium
Abstract :
A 2.4 GHz fully integrated Doherty power amplifier is fabricated in standard 90nm CMOS technology. The power amplifier employs a series combining transformer to eliminate bulky λ/4 transmission lines. An efficiency enhancement at power back-off is measured. The two-stage Doherty PA has 16.6 dB small-signal gain and produces 20.5 dBm saturated output power with a drain efficiency of 30.9% (PAE 26.7%) by using 2 V supply voltage. The PA is tested with 54 Mbps WLAN 802.11g signal and the PA meets the stringent EVM and spectral mask requirements at 12.9 dBm average output power with a drain efficiency of 14.1% (PAE 11.5%).
Keywords :
CMOS integrated circuits; power amplifiers; transformers; CMOS technology; Doherty PA; Doherty power amplifier; EVM; WLAN 802.11g; frequency 2.4 GHz; gain 16.6 dB; size 90 nm; spectral mask; transformer; transmission lines; voltage 2 V; Circuit faults; Driver circuits; Gain; Impedance; Power amplifiers; Power generation; Transistors;
Conference_Titel :
ESSCIRC, 2010 Proceedings of the
Conference_Location :
Seville
Print_ISBN :
978-1-4244-6662-7
DOI :
10.1109/ESSCIRC.2010.5619704
