High-frequency Reference System Implementations Utilizing Mirror-encapsulated BAW Resonators

2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF) Pub Date : 2020-07-01 DOI:10.1109/IFCS-ISAF41089.2020.9234834

Ernest Ting-Ta Yen, Benyong Zhang, D. Griffith, Keegan Martin, M. Chowdhury, J. Segovia-Fernandez, Trevor Tarsi, B. Goodlin, B. Cook, R. Jackson

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Abstract

This paper introduces TI's mirror-encapsulated bulk acoustic wave (BAW) resonator technology and two novel system applications. Similar to other BAW resonators, the dual-Bragg acoustic resonator (DBAR) utilizes piezoelectric aluminum nitride (AIN) thin film between two metal electrodes. However, the DBAR operation requires no cavity on either side of the resonant body. This unique micro-acoustic resonator technology enables cost-effective system integration in mass production. The first system application is a novel network synchronizer based on an integrated ultra-low noise voltage-controlled BAW oscillator (VCBO). When operating as a jitter cleaner, the synthesized output clock rms jitter can be reduced to less than 60 fs (12 kHz–20 MHz). The second application uses this 2.5 GHz DBAR-oscillator as a high-frequency reference clock, achieving a ±30 ppm Bluetooth Low Energy (BLE) compliant crystal-less radio.

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利用镜像封装BAW谐振器实现高频参考系统

本文介绍了TI公司的镜像封装体声波(BAW)谐振器技术和两种新的系统应用。与其他BAW谐振器类似，双布拉格声学谐振器(DBAR)在两个金属电极之间使用压电氮化铝(AIN)薄膜。然而，DBAR操作不需要谐振体两侧的空腔。这种独特的微声谐振器技术使大规模生产中具有成本效益的系统集成。第一个系统应用是基于集成超低噪声压控BAW振荡器(VCBO)的新型网络同步器。当作为抖动清洁器工作时，合成输出时钟rms抖动可以降低到小于60 fs (12 kHz-20 MHz)。第二个应用使用这个2.5 GHz的dbar振荡器作为高频参考时钟，实现了±30 ppm的低功耗蓝牙(BLE)兼容的无晶体无线电。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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2020 Joint Conference of the IEEE International Frequency Control Symposium and International Symposium on Applications of Ferroelectrics (IFCS-ISAF)

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