50 MHz-10 GHz low-power resistive feedback current-reuse mixer with inductive peaking for cognitive radio receiver

Abstract

A low-power wideband mixer is designed and implemented in 0.13 μm standard CMOS technology based on resistive feedback current-reuse (RFCR) configuration for the application of cognitive radio receiver. The proposed RFCR architecture incorporates an inductive peaking technique to compensate for gain roll-off at high frequencywhile enhancing the bandwidth.Acomplementary current-reuse technique is used between transconductance and IF stages to boost the conversion gain without additional power consumption by reusing the DC bias current of the LO stage. This downconversion double-balanced mixer exhibits a high and flat 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 (P1dB) andmaximum input third-order intercept point (IIP3) are -13.6 dBmand -4.5 dBm, respectively, over the desired frequency ranging from 50MHz to 10GHz. The proposed circuit operates down to a supply headroom of 1V with a low-power consumption of 3.5 mW.