Low-Power ASK Detector for Low Modulation Indexes and Rail-to-Rail Input Range
Low-Power ASK Detector for Low Modulation Indexes and Rail-to-Rail Input Range
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适用于低调制指数和轨到轨输入范围的低功耗 ASK 检测器
DOI：
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
G. Palmisano
中科院分区：
文献类型：
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作者：
Vincenzo Fiore;E. Ragonese;G. Palmisano
提出了一种用于低功率射频（RF）接收器的高性能超高频幅移键控（ASK）检测器。该电路基于高增益共源拓扑，具有提供自适应偏置的反馈环路。因此，可以实现高灵敏度和轨到轨输入操作以及低功耗。该探测器采用标准 130 nm 互补金属氧化物半导体技术实现。灵敏度测量表明可以正确检测 2 Mb/s ASK 调制的 915 MHz 信号，其峰值电平和调制指数分别约为 200 mV 和 5%，这意味着包络信号幅度低至 5 mV。该电路在轨到轨 RF 变化和调制指数从 5% 到 100% 的情况下工作时，从 1.2V 电源汲取的电流不到 3.4μA。这种性能使探测器适用于具有射频能量收集功能的无电池系统。
A high-performance ultrahigh-frequency amplitude shift keying (ASK) detector for low-power radio-frequency (RF) receivers is proposed. The circuit is based on a high-gain common-source topology with a feedback loop that provides adaptive biasing. Hence, high sensitivity and rail-to-rail input operation are achieved along with low power consumption. The detector was implemented in a standard 130-nm complementary metal-oxide-semiconductor technology. Sensitivity measurements demonstrate correct detection of a 2-Mb/s ASK-modulated 915-MHz signal with a peak level and a modulation index of around 200 mV and 5%, respectively, which means an envelope signal amplitude of as low as 5 mV. The circuit draws less than 3.4 μA from a 1.2-V power supply while operating with rail-to-rail RF variations and modulation indexes from 5% to 100%. This performance makes the detector suitable for batteryless systems with RF energy harvesting.