A low-power wideband mixer is designed and implemented in 0.13 ????m standard CMOS technology based on resistive feedback\ncurrent-reuse (RFCR) configuration for the application of cognitive radio receiver. The proposed RFCR architecture incorporates\nan inductive peaking technique to compensate for gain roll-off at high frequencywhile enhancing the bandwidth.Acomplementary\ncurrent-reuse technique is used between transconductance and IF stages to boost the conversion gain without additional power\nconsumption by reusing the DC bias current of the LO stage. This downconversion double-balanced mixer exhibits a high and\nflat conversion gain (CG) of 14.9 �± 1.4 dB and a noise figure (NF) better than 12.8 dB.The maximum input 1-dB compression point\n(P1dB) andmaximum input third-order intercept point (IIP3) are ?13.6 dBmand ?4.5 dBm, respectively, over the desired frequency\nranging from 50 MHz to 10GHz.The proposed circuit operates down to a supply headroom of 1V with a low-power consumption\nof 3.5 mW.
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