Abstract
Nearly all electronic systems require a clock. Crystal oscillators have been the most common way to generate an accurate reference frequency for the last 100 years. Despite their ubiquity, crystal oscillators have several drawbacks, including cost, large size, degraded frequency stability at temperature extremes, and sensitivity to shock and vibration. Bulk acoustic wave resonators (BAW) have emerged as an alternative to crystals, allowing a reduction in the footprint of electronic systems and enabling exciting new applications. This chapter covers several aspects of designing with BAW resonators, including oscillator topologies, frequency tunability and stability, and passive and active temperature compensation. System-level advantages such as fast startup, higher frequency, and improved robustness will also be discussed. The chapter concludes with an introduction to applications for BAW that extend beyond frequency references.
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Griffith, D. (2023). Integrated BAW-Based Frequency References. In: Harpe, P., Baschirotto, A., Makinwa, K.A. (eds) Biomedical Electronics, Noise Shaping ADCs, and Frequency References. Springer, Cham. https://doi.org/10.1007/978-3-031-28912-5_16
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DOI: https://doi.org/10.1007/978-3-031-28912-5_16
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