CMOS RF Receiver Design for Wireless LAN Applications

This paper describes design techniques for RF CMOS receivers operating in the 2.4-GHz band. A direct-conversion receiver targetting spread-spectrum wireless LAN applications employs partial channel selection filtering, dc offset removal, and baseband amplification. Fabricated in a 0.6- #m CMOS technology, the receiver achieves a noise figure of 8.3 dB, IP 3 of ,9 dBm, IP 2 of +22 dBm, and voltagegain of 34 dB while dissipating 80 mW from a 3-V supply. Dynamic range and linearity requirements of A/D converters used in RF receivers are also presented. I. INTRODUCTION Wireless local area networks(WLANs) in the 2.4-GHz range have rapidly emerged in the consumer market. Providing flexibility and reconfigurability, WLAN standards allow data rates of several megabits per second and serve as high-speed links in office buildings, hospitals, factories, etc. For high-volume portable applications such as laptop computers, both cost and power dissipation of WLAN transceivers become critical, ne..