Abstract
In this chapter, we describe the architecture of an in-tire-pressure sensing system for automotive applications. Challenges are the supply of sufficient power, the proper functioning of the sensors (pressure, acceleration, and temperature), and a transceiver architecture with extremely low power consumption. Power consumption is reduced by use of a high-frequency resonator based on the bulk acoustic wave (BAW) technology. Such devices are used both in the transmit and in the receive paths. Further power-saving measures are taken introducing a specially adapted on/off cycling operation. The power supplied to the system is provided either by two small batteries or an energy scavenger, both capacitor buffered. The electronic system is integrated into 3D stacks using either through-silicon vias or the ultrathin chip stacking method to provide short interconnects for further reduced power consumption. The overall system is mounted in a compact molded interconnect device to save space and weight.
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Dielacher, M. et al. (2013). A Robust Wireless Sensor Node for In-Tire-Pressure Monitoring. In: Enz, C., Kaiser, A. (eds) MEMS-based Circuits and Systems for Wireless Communication. Integrated Circuits and Systems. Springer, Boston, MA. https://doi.org/10.1007/978-1-4419-8798-3_12
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DOI: https://doi.org/10.1007/978-1-4419-8798-3_12
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