A 19.38 dBm OIP3 gm-boosted up-conversion CMOS mixer for 5-6 GHz application

A highly linear up-conversion mixer for 56GHz wireless local area network (WLAN) applications implemented using TSMC 0.18-m standard complementary metal oxide semiconductor (CMOS) technology is presented. The feature of the proposed mixer is based on the double-balanced Gilbert cell with current-reused technique to enhance the third-order input intercept point (IIP3). Moreover, local oscillator (LO) body grounded and gm-boosting techniques are also integrated to boost the power conversion gain (CG). The proposed up-conversion mixer demonstrates a maximum CG of 7.21dB, a maximum IIP3 of 13.17dBm, an output third-order input intercept point (OIP3) of 19.38dBm, and a DC power consumption of 4mW on silicon given a 1.1V supply voltage. The overall chip area including radio frequency (RF) pads is 10.85mm2, where the active area is merely 0.70.37mm2.

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