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

The analog baseband section of a receiver for high data-rate 60GHz wireless communications is implemented in 90nm CMOS. It consists of the cascade of a 1<sup>st</sup>-order transimpedance amplifier with finely programmable gain, a 4<sup>th</sup>-order source-follower based filter and a coarse gain 1<sup>st</sup>-order programmable gain amplifier, resulting in an overall 6<sup>th</sup>-order selectivity and a 1GHz cut-off frequency. Gain can be programmed from 0dB up to 20dB with 1dB step control, drawing 9.5mA (0–9dB gain range) or 10.8mA (10–20dB gain range) from a 1V supply. A 8.2dBm IIP3 and a −145dBm/Hz IRN are measured respectively at 0dB and 20dB gain. The entire baseband section occupies 400×390µm<sup>2</sup> die area.

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