A dual-band transmitter for IEEE 802.11a/b/g WLAN

摘要

A dual-band transmitter for WLAN 802.11a/b/g is implemented in a 0.25-/spl mu/m CMOS process. With suitable architecture choosing and frequency planning, many components can be shared, modulation accuracy can be improved, and only one VCO and frequency synthesizer is needed for the dual-band application. The current consumption is 82mA at 5GHz band and 63mA at 2.4GHz band under 2.5V power supply. For 64-QAM OFDM mode, an EVM of -36dB is achieved at both bands.