A CMOS multi-standard mixer for WCDMA, Wi-Bro and 802.11a/b/g

A multi-standard direct-conversion mixer for WCDMA, WiBro and 802.11a/b/g is designed in 0.18 /spl mu/m CMOS technology. The mixer can be used in RF receiver for multi-standard because of switched inductor matching network. Frequency band selection can be done by turning on or off the switch transistor in the matching network. Accordingly, designed mixer is able to keep measured return loss below -13 dB through 2.1/spl sim/2.5 GHz and 5.15/spl sim/5.825 GHz bands. The following results are achieved: 14/spl sim/16 dB voltage conversion gain, 8.7/spl sim/9.7 dB NF, -8/spl sim/-3.7 dBm IIP3 with 8.8 mW power consumption in 2.1/spl sim/2.5 GHz band; also, 8.3/spl sim/10 dB voltage conversion gain, 12/spl sim/13.4 dB NF and 0.1/spl sim/1.7 dBm IIP3 with same power consumption are obtained in 5.1/spl sim/5.8 GHz band,.

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