A Dual-Mode Wi-Fi/BLE Wake-Up Receiver

This article presents a dual-mode wake-up receiver (WuRX) compatible with both Bluetooth-Low-Energy (BLE) and Wi-Fi transmitters. The proposed WuRX achieves the state-of-the-art power (as low as 4.4 $\mu \text{W}$ through a latency-power duty-cycled tradeoff), sensitivity (as low as −92 dBm), and interference resilience (signal-to-interference ratio (SIR) =−67 dB) via a carefully architected frequency plan that supports BLE advertisement channel hopping or a proposed subcarrier-based within-channel Wi-Fi frequency hopping scheme, a carefully crafted frequency down-conversion plan that enables low-power receiver architecture via integer- $N$ arithmetic, and an on-chip image rejection filter for full on-chip integration. The proposed design is implemented in a 65-nm CMOS process and operates from a 0.5-V supply.