一个温度强大的信封探测器,接收OK调制信号,用于低功耗应用
Alessia Maria Elgani1,2, Matteo D'Addato1,2, Luca Perilli2,3
1STMicroelectronics, 20864 Agrate Brianza e Cornaredo, Italy.
Sensors (Basel, Switzerland)
|October 16, 2024
概括
本研究介绍了一种温度补偿的被动信封探测器 (ED),用于物联网无线传感器网络中的唤醒接收器. 它在广泛的温度范围内保持稳定的接收器灵敏度,提高了OOK调制信号的可靠性.
科学领域:
- 电气工程 电气工程
- 集成电路设计 集成电路设计
- 无线通信无线通信
背景情况:
- 无线传感器网络 (WSN) 和物联网 (IoT) 依赖于节能唤醒接收器 (WuR).
- 被动信封探测器 (ED) 是 WuR 中关键组件,用于开启-关闭 (OOK) 信号解调.
- ED性能,特别是输入电阻,可以随温度显著变化,影响接收器的灵敏度.
研究的目的:
- 为OOK信号接收开发一种具有增强温度稳定的被动ED.
- 为了保持温度上的恒定输入电阻,确保先前匹配网络的稳定负载.
- 为了保持整个接收链在广泛的温度范围内 (-40°C至120°C) 的灵敏度.
主要方法:
- 设计了一种使用90nmCMOS技术的被动信封探测器 (ED).
- 集成了一种比例到绝对温度 (PTAT) 电流块,用于温度补偿.
- 我们比较了两个实现:一个是最小化不匹配,另一个是最小化区域.
- 模拟性能为1kbps的OK信号在433MHz的载波频率与0.6V的供应.
主要成果:
- 在-40°C至120°C范围内,灵敏度温度变化降低了5dB.
- 最小面积的实施表明,在所有测试温度中,估计的整体链灵敏度优越.
- 尽管灵敏度传播更高,但最小区域版本在保持一致的性能方面更有效.
结论:
- 拟议的温度补偿被动ED有效地稳定了 WuRs 中的接收器灵敏度.
- PTAT电流集成是一种可行的方法,可以减轻被动ED中的温度诱导的性能偏移.
- 最小面积的设计为实现物联网应用中的良好的灵敏度稳定性提供了实际的权衡.
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