A Harmonic-Selective Multi-Band Wireless Receiver With Digital Harmonic Rejection Calibration

A 30-mW multi-band receiver based on harmonic selection is presented. The prototype receiver employs a 32-phase non-overlapping local oscillator (LO) and is capable of simultaneously receiving multiple wireless signals arbitrarily located between 600 MHz and 3 GHz. The receiver achieves 2.4–5-dB noise figure (NF) and tolerates as large as −10-dBm out-of-band blockers. Employing a digital harmonic rejection (HR) calibration to overcome phase and amplitude mismatches in the 32-phase LO and down-conversion paths, close to 80 dB of HR is measured.