A Wideband Dual-path Reconfigurable Receiver Front-end in 180 nm CMOS

In this paper, a wideband reconfigurable receiver front-end incorporating two paths is proposed. The main path has the advantage of low noise thanks to the low noise transconductance amplifier preceding the mixer and baseband. Based on the mixer-first structure, the auxiliary path provides a high inband and out of band linearity. The inductor resonance is also designed to mitigate the baseband noise crosstalk issue. Both of two paths share a common baseband circuit and are driven by a 25% duty cycle LO generator. Simulation results in 180 nm CMOS indicate that the main path provides a low noise of 2.7 dB, while the auxiliary obtains the inband IIP3 of 9.2 dBm with f
_LO
= 1.25 GHz.