A 22nm CMOS 2.4-5.25GHz Mixer Resilient to Out-of-Band Blockers

An anti-blocking down-conversion mixer circuit with operating frequency of 2.4-5.25 GHz based on 22-nm CMOS process is presented in this paper, which is mainly composed of four modules: passive switch pair, 25% duty cycle generator, switched capacitor array and baseband amplifier circuit with DC cancellation function. High resilience to out-of-band interference is achieved thanks to a mixer-based RF blocker filter. The results show that under 1V power supply voltage, the voltage conversion gain is better than 18 dB, the noise Figure is less than 13 dB, and the operating current is less than 9 mA.