A 1.2V current mirror double balanced mixer with current reusing technique

Abstract

This paper presents the design of a double balanced current-mirror mixer with current reusing technique. The proposed mixer is based on high linearity current mirror structure which guarantees a high IIP3. To improve the power efficiency of the current mirror structure, a current reusing technique is used to share the bias current of the transconductance stage and the output stage. Compared with the traditional current mirror mixer, a power decrease of 36% can be achieved. The mixer is designed in 0.13-μm 1P8M RFCMOS process; operating at the frequency of 1GHz. Simulation results indicate a peak conversion gain of 12.6dB, a relatively high IIP3 of 4.0dBm and a moderate NF of 16dB. The whole mixer has a power consumption of 3.84mW under 1.2V supply voltage.