A Wireless Body Sound Sensor with a Dedicated Compact Chipset

摘要

A compact wearable smart sensor for the application of wireless body sound monitoring is presented. It supports several kinds of body sound monitoring and has been measured with heart sound as an example. With the sensor, a wireless body sound monitoring system can be realized, which enables us to "build a hospital in our pocket". In order to achieve a small form factor, a dedicated highly integrated chipset has been designed for the wearable sensor. The chipset consists of a sensor readout chip for data acquisition and a 400 MHz band transceiver chip for wireless communication. It has been fabricated in CMOS technologies and can provide all the necessary sensor functions with a commercial EEPROM chip. Excluding the matching network, only eight off-chip components are required to fabricate the hardware system of the sensor, which helps to significantly improve integrated level.