A low-power fully integrated RF locked loop for Miniature Atomic Clock
A low-power fully integrated RF locked loop for Miniature Atomic Clock
复制标题
用于微型原子钟的低功耗全集成射频锁环
DOI：
10.1109/isscc.2011.5746214
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S. Lecomte
中科院分区：
文献类型：
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作者：
D. Ruffieux;M. Contaldo;J. Haesler;S. Lecomte
非常精确的本地时钟在现代通信和导航应用中起着基础性的作用。高精度基准支持快速通信数据速率，而在导航中，它们允许在没有同步信号的情况下进行更长的停留操作时间，例如来自全球定位系统(GPS)的信号。即使原子钟可以达到如此高的精度，只有光子学和MEMS工艺的最新发展才能达到手持设备所需的低功耗和小尺寸[1]，为实现微型原子钟(MAC)铺平了道路。然而，要达到总体设备体积和功耗<；1cm3和功耗<；30 mW[2]的目标，需要进一步小型化和改进所有系统方面的设计，包括射频控制电子设备，它必须在不影响时钟性能的情况下消耗低功率。最先进的实现如[3]和[4]获得了有趣的低功耗性能，但使用的离散电子元件限制了系统的小型化。本文提出了一种专为MAC应用而设计的全集成锁频环，并结合基于相干布居捕获(CPT)询问的缓冲87Rb信元系统进行了测试。
Very accurate local clocks play a fundamental role in modern communication and navigation applications. High-precision references enable fast communication data rates, while in navigation they allow longer holdover operation times in the absence of a synchronization signal, for example from the Global Positioning System (GPS). Even if this high accuracy can be achieved with atomic clocks, only the recent developments in photonics and MEMS processes allowed reaching the low power consumptions and small sizes needed for hand-held devices [1], paving the way to the realization of Miniature Atomic Clocks (MAC). However, reaching the target of overall device volumes <1cm3 and power consumptions <30mW [2] requires further miniaturization and improved design of all the system aspects, including the RF control electronics, which has to consume low power without affecting the clock performances. State-of-the-art implementations as [3] and [4] reached interesting low-power consumption performances, but using discrete electronic components that limit system miniaturization. This work presents a fully integrated frequency locked loop designed for MAC applications, tested in combination with a buffered 87Rb cell system based on coherent population trapping (CPT) interrogation.