Abstract
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 μW 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.
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