Title :
A High-Efficient CMOS RF Power Amplifier With Automatic Adaptive Bias Control
Author :
Chen, Yi-Jan Emery ; Liu, Chih-Yun ; Luo, Tang-Nian ; Heo, Deukhyoun
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei
Abstract :
A 2.4-GHz Doherty power amplifier (PA) is developed in 0.18-mum CMOS technology. An automatic adaptive bias control circuit is integrated with the auxiliary PA to improve the overall performance of the PA. Operated at 3V, the P1 dB and associated power-added-efficiency (PAE) of the PA are 21dBm and 33%, respectively. At the output power 6-dB backoff from P1 dB, the PAE remains 21%. The limited PAE degradation at backoff power levels makes the PA suitable for the applications with high peak-to-average power ratio
Keywords :
CMOS analogue integrated circuits; UHF integrated circuits; UHF power amplifiers; 0.18 micron; 2.4 GHz; 3 V; CMOS technology; Doherty power amplifier; RF power amplifier; automatic adaptive bias control circuit; Adaptive control; Automatic control; CMOS technology; High power amplifiers; Integrated circuit technology; Power amplifiers; Power generation; Programmable control; Radio frequency; Radiofrequency amplifiers; Adaptive bias; CMOS; Doherty power amplifier (PA); orthorgonal frequency division multiplexing (OFDM); peak-to-average power ratio (PAPR);
Journal_Title :
Microwave and Wireless Components Letters, IEEE
DOI :
10.1109/LMWC.2006.884909
