Title :
A Low-Power Fullband 802.11a/b/g WLAN Transceiver With On-Chip PA
Author :
Chen, Tzung-Ming ; Chiu, Yung-Ming ; Wang, Chun-Cheng ; Chan, Ka-Un ; Lin, Ying-Hsi ; Huang, Ming-Chong ; Lu, Chao-Hua ; Wang, Wen-Shan ; Hu, Che-Sheng ; Lee, Chao-Cheng ; Huang, Jiun-Zen ; Chang, Bin-I ; Yen, Shih-Chieh ; Lin, Ying-Yao
Author_Institution :
Realtek Semicond. Corp., Hsinchu
fDate :
5/1/2007 12:00:00 AM
Abstract :
A low-power fullband 802.11a/b/g WLAN transceiver in 0.15-mum CMOS technology is described. The zero-IF transceiver achieves a receiver noise figure of 4.4/4 dB for the 2.4-GHz/5-GHz bands, respectively. The corresponding sensitivity at 54-Mb/s operation is -72 dBm for 802.11g and -74 dBm for 802.11a using actual PER measurement. An on-chip PA delivers 20 dBm output P1-dB. A new I/Q compensation scheme is implemented in local oscillator (LO) and an image rejection of better than 52 dB is observed. The transmitter delivers 10/1.5 dBm (2.4-/5-GHz) EVM-compliant output power for a 64-QAM OFDM signal at 54-Mb/s. The power consumption is 117/135 mW (1.8-V) in the receive mode and 570/233.1 mW in the transmit mode for 2.4/5 GHz, respectively. The low power consumption, high integration and robustness (-40 to 140degC) make this transceiver suitable for portable applications
Keywords :
CMOS analogue integrated circuits; IEEE standards; MMIC oscillators; MMIC power amplifiers; UHF integrated circuits; UHF oscillators; UHF power amplifiers; low-power electronics; transceivers; wireless LAN; -40 to 140 C; 0.15 micron; 117 mW; 135 mW; 2.4 GHz; 233.1 mW; 4 dB; 4.4 dB; 5 GHz; 54 Mbit/s; 570 mW; 64-QAM OFDM signal; 802.11a/b/g WLAN transceiver; CMOS technology; I/Q compensation scheme; RF transceiver; image rejection; local oscillator; low-power fullband transceiver; on-chip power amplifier; transmitter; wireless local area networks; zero-IF transceiver; CMOS technology; Energy consumption; Local oscillators; Noise figure; OFDM; Power generation; Robustness; Transceivers; Transmitters; Wireless LAN; Direct-conversion; I/Q compensation; IEEE 802.11a/b/g; RF transceiver; power amplifier (PA); receiver; synthesizer; transmitter; wireless LAN (WLAN);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2007.894303
