N-Path Mixer with Wide Rejection Including the 7th Harmonic for Low Power Multi-standard Receivers

This paper proposes an N-Path mixer rejecting a wide bandwidth 1:8, i.e. including the 7
^th
harmonic, while keeping a low complexity, particularly suitable for low power multistandard receivers. The main principle is based on an accurate choice of the switch control signals and of the gains of the amplifiers stage. The circuit has been manufactured in 28nm FDSOI technology. Measurements prove the theory with an harmonic rejection higher than 45 dB for the 3
^rd
, 5
^th
, and 7
^th
harmonics, an in-band IIP3 of -3.5 dBm, for a power consumption of 22 mW.