A 9.5mW analog baseband RX section for 60GHz communications in 90nm CMOS

The analog baseband section of a receiver for high data-rate 60 GHz wireless communications is implemented in 90 nm CMOS. It consists of the cascade of a 1^st-order transimpedance amplifier with finely programmable gain, a 4^th-order source-follower based filter and a coarse gain 1^st-order programmable gain amplifier, resulting in an overall 6^th-order selectivity and a 1 GHz cut-off frequency. Gain can be programmed from 0 dB up to 20 dB with 1 dB step control, drawing 9.5 mA (0-9 dB gain range) or 10.8 mA (10-20 dB gain range) from a 1 V supply. A 8.2 dBm IIP3 and a -145 dBm/Hz IRN are measured respectively at 0 dB and 20 dB gain. The entire baseband section occupies 400 × 390 μm² die area.