A wide-band mixer for WCDMA/CDMA2000 in 90nm digital CMOS process

A wide-band mixer with high linearity and insensitive to process and temperature variations, intended for used in WCDMA and CDMA2000 receivers, is implemented in a 90 nm digital CMOS process. The measurement data consistently show greater than 7 dBm of IIP3 and 52 dBm of IIP2 in both low and high frequency bands. In the low frequency band, the variation of IIP3 and IIP2 over the temperature range from -20/spl deg/C to 80/spl deg/C is only 0.2 dB and 2.2 dB respectively. The whole mixer for I/Q, including LO divider and LO buffer, consumes less than 8 mA in the low band and 13 mA in the high bands.