A wideband RF receiver with >80 dB harmonic rejection ratio

摘要

In this paper a wideband RF receiver with harmonic rejection (HR) is presented. Both gain mismatch and phase mismatch of the HR mixer have been calibrated independently using a digital calibration scheme. After calibration, both the 3 order harmonic rejection ratio (HRR) and the 5 order HRR are greater than 80 dB and 70 dB respectively. The phase mismatch that leads to even order distortion is also calibrated to greater than 80 dB HRR. The calibration performed at 750 MHz is further observed being effective in more than 2 octaves of bandwidth with greater than 70 dB HRR. The receiver was manufactured in 65nm CMOS technology, occupying 0.72 mm. Input RF frequency range is 0.15 GHz to 1 GHz and the receiver consumes 64 mW at 1 GHz. Noise figure is 3.2 dB and out-of-band IIP3 is −7 dBm at a total gain of 48 dB.