A 0.015-mm² 60-GHz reconfigurable wake-up receiver by reusing multi-stage LNAs

Abstract

An area-ef cient 60-GHz wake-up receiver (WuRx) using recon guration techniques of multistage low-noise ampli ers (LNAs) is presented. The gain stages of the 60-GHz LNA are reused as the envelope detectors for the wake-up receiver. Therefore, the bulky components such as extra switches between the wake-up receiver and the LNA, additional antennas, and excess input matching network can be removed in the design of the wakeup receiver. Furthermore, due to the recon gurability of the LNA, the wake-up receiver can work in sensitivity-boost mode by using several LNA gain stages as a pre-ampli er. The wake-up receiver is fabricated in a 65-nm CMOS process occupying a core area of 0.015 mm 2 (excluding the LNA). The WuRx achieves the sensitivity of −46 dBm and −60 dBm with a power consumption of 64 μW and 12.7 mW, respectively.