Title :
A Low-Power Dual-Band Triple-Mode WLAN CMOS Transceiver
Author :
Maeda, Tadashi ; Matsuno, Noriaki ; Hori, Shinichi ; Yamase, Tomoyuki ; Tokairin, Takashi ; Yanagisawa, Kiyoshi ; Yano, Hitoshi ; Walkington, Robert ; Numata, Keiichi ; Yoshida, Nobuhide ; Takahashi, Yuji ; Hida, Hikaru
Author_Institution :
Syst. Devices Res. Labs., NEC Corp., Kanagawa
Abstract :
This paper describes a 0.18-mum CMOS direct-conversion dual-band triple-mode wireless LAN transceiver. The transceiver has a concurrent dual-band low-noise amplifier for low power consumption with a low noise figure, a single widely tunable low-pass filter based on a triode-biased MOSFET transconductor for multi-mode operation with low power consumption, a DC-offset compensation circuit with an adaptive activating feedback loop to achieve a fast response time with low power consumption, and a SigmaDelta-based low-phase-noise fractional-N frequency synthesizer with a switched-resonator voltage controlled oscillator to cover the entire frequency range for the IEEE WLAN standards. The transceiver covers both 2.4-2.5 and 4.9-5.95 GHz and has extremely low power consumption (78 mA in receive mode, 76 mA in transmit mode-both at 2.4/5.2 GHz). A system noise figure of 3.5/4.2 dB, a sensitivity of -93/-94 dBm for a 6-Mb/s OFDM signal, and an error vector magnitude of 3.2/3.4% were obtained at 2.4/5.2 GHz, respectively
Keywords :
CMOS integrated circuits; MOSFET; frequency synthesizers; low noise amplifiers; low-pass filters; low-power electronics; sigma-delta modulation; transceivers; voltage-controlled oscillators; wireless LAN; 0.18 micron; 2.4 to 2.5 GHz; 4.9 to 5.95 GHz; 6 Mbit/s; CMOS direct-conversion; IEEE 802.11a/b/g; IEEE WLAN standards; OFDM signal; SigmaDelta-based frequency synthesizer; complementary metal-oxide semiconductor transceiver; concurrent dual-band low-noise amplifier; dual-band wireless LAN transceiver; fractional-N frequency synthesizer; low-phase-noise frequency synthesizer; multimode operation; switched-resonator; triode-biased MOSFET transconductor; triple mode WLAN CMOS transceiver; voltage controlled oscillator; widely tunable low-pass filter; Adaptive filters; Dual band; Energy consumption; Frequency synthesizers; Low pass filters; Low-noise amplifiers; Noise figure; Transceivers; Tunable circuits and devices; Wireless LAN; Complementary metal-oxide semiconductor (CMOS) transceiver; IEEE802.11a/b/g; dual-band; frequency synthesizer; low-noise amplifier (LNA); low-pass filter (LPF); orthogonal frequency division multiplexing (OFDM); triple-mode; voltage controlled oscillator (VCO); wireless LAN (WLAN);
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2006.883323
