A linear-in-dB analog baseband circuit for low power 60GHz receiver in standard 65nm CMOS

This paper presents an analog baseband (ABB) circuit for low power 60 GHz wireless receiver in standard 65 nm CMOS. The proposed analog baseband system combines variable gain amplifiers (VGA) with a 3rd-order type II Chebyshev filter and provides linear steps as well as filter tuning range to achieve sufficient out-of-band rejection. The ABB demonstrates 2 dB gain step tuning range from 3 - 31 dB, 3-dB bandwidth of 980 MHz, OP1dB of 0dBm, and noise figure of 6 dB to 21 dB. The ABB consumes 48 mW at max gain setting and 32 mW at minimum gain setting from a 1.1 V supply. The entire ABB occupies an area of 1.1 mm² with active area of 0.2 mm².