Abstract
In this paper, harmonic rejection (HR) mixing tech-
niques to obtain a high level of HR are described. This is achieved
by reducing the sensitivity to mismatches in devices operating
at high frequencies. A design fabricated in a 110-nm CMOS
process rejects up to the first 14 local oscillator (LO) harmonics
and achieves third, fifth, and seventh HR ratios in excess of 52,
54, and 55 dB, respectively, without any calibration or trimming.
This mixer also rejects flicker noise and has improved quadratu