A 742μW -94.5dBm Sensitivity 5G-NR Wake-Up Receiver

This work presents a wake-up receiver (WUR) compliant with the draft 5G low-power wake-up signal (LP-WUS) specification. The 5G LP-WUS uses multi-carrier (MC) OOK modulation which enables a PLL-less, single-phase direct conversion architecture that significantly reduces power consumption compared to a conventional cellular receiver. The WUR employs a current-reuse LNTA for a high sensitivity under a low power budget. A current-mode RF front-end with an enhanced baseband TIA is implemented for blocker-tolerance. Fabricated in $65-\mathrm{nm}$ CMOS, the WUR consumes $742 \mu \mathrm{~W}$ active power and achieves a $\mathbf{- 9 4. 5 ~ d B m}$ sensitivity and $\mathbf{- 6 3. 5 ~ d B}$ out-of-band (OOB) signal-to-interference ratio (SIR).