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A5 2 22W Wake-Up Receiver With 72 dBm Sensitivity Using an Uncertain-IF Architec
设计了一种采用不确定IF架构的2GHz唤醒接收器，具有72dBm灵敏度和超低功耗。
90nm CMOS, 0.5V, 52μW, 72dBm灵敏度, 100kbps
唤醒接收器无线传感器网络超低功耗MEMS滤波不确定IF架构
▸创新点1：采用MEMS高Q滤波器技术，显著提高接收器的选择性和灵敏度，实现72 dBm的高灵敏度性能，同时降低功耗。
▸创新点2：使用自由运行的CMOS环形振荡器作为RF LO（本地振荡器），简化了电路设计并降低了功耗，仅消耗52 μW的功率。
▸创新点3：提出不确定IF架构（Uncertain-IF Architecture），结合MEMS滤波器和自由运行振荡器，优化了接收器的整体性能，适用于超低功耗无线传感器网络。
▸创新点4：在90 nm CMOS工艺中实现原型设计，展示了高集成度和低功耗的可行性，为无线传感器网络的实用化提供了技术支持。
Abstract
e Gambini , Student Member , IEEE, and Jan Rabaey , Fellow, IEEE
Abstract—A dedicated wake-up receiver may be used in wire-
less sensor nodes to control duty cycle and reduce network latency.
However, its power dissipation must be extremely low to minimize
the power consumption of the overall link. This paper describes
the design of a 2 GHz receiver using a novel “uncertain-IF” ar-
chitecture, which combines MEMS-based high-Q filtering and a
free-running CMOS ring oscillator as the RF LO. The rec