Abstract
The paper presents a fully integrated two-receive-path and one-transmit-path CMOS radio transceiver chip compliant with 2.4GHz IEEE802.11b/g WLAN standards. The transceiver chip is based on direct-conversion architecture and integrates LNAs, mixers, filters, VGA, frequency synthesizer with on-chip VCO and voltage reference circuit in 0.25/spl mu/m CMOS process. It can improve the SNR characteristic of the communication system about 3/spl sim/6 dB. It increases the cover-range and reduces the influence of the multipath effect significantly. The noise figure is less than 5dB in a receive-path. The consumption currents of the receivers and transmitter are 120mA and 110mA at 2.5V power supply, respectively.
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