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A Low-Power 2.4-GHz Current-Reused Receiver Front-End and Frequency Source for Wireless
提出了一种适用于无线传感器网络的低功耗24GHz接收前端和频率源设计
30.5dB转换增益，10.2dB噪声系数，500μA@1.0V供电
24GHz接收机电流复用频率源低功耗无线传感器网络
▸创新点1：电流复用技术（电路创新） - 在RF前端和频率源中采用电流复用技术，显著降低了整体功耗，仅需500μA的偏置电流即可实现30.5 dB的转换增益和10.2 dB的噪声系数。
▸创新点2：频率倍增方案（方法创新） - 通过频率倍增方案，实现了2.2 GHz中心频率的频率源，相位噪声低至-115.83 dBc/Hz @ 1 MHz偏移，同时仅消耗840μA电流。
▸创新点3：极低功耗设计（系统创新） - 整体设计在1.0 V和0.7 V的低电压下工作，功耗控制在毫瓦级，适用于无线传感器网络等严格限制功耗的应用场景。
▸创新点4：高性能与低功耗的平衡（系统创新） - 在极低功耗的前提下，实现了较高的转换增益和较低的噪声系数，展示了高性能与低功耗的有效平衡。
Abstract
In this paper, we present a receiver front-end and a frequency source suitable for wireless sensor network applica- tions, in which power consumption is severely restricted under several milliwatts. For such an extremely low-power receiver, current-reusing and frequency multiplying schemes are proposed for both the RF front-end and frequency source. The proposed front-end achieves a conversion gain of 30.5 dB and a noise figure of 10.2 dB at the 10-MHz intermediate frequency (IF), taking only 500- A bias current from a 1.0-V supply voltage. The measured phase noise of the fabricated frequency source is 115.83 dBc/Hz at 1 MHz offset from a 2.2-GHz center frequency, taking 840 A from a 0.7-V supply. The front-end performance is compared with the previously reported low-power front-ends operating in similar frequency ranges.