A review of low-power wireless sensor microsystems for biomedical capsule diagnosis.

The development of a sensor microsystems containing all the components of data acquisition system, such as sensors, signal-conditioning circuits, analog-digital converter, interface circuits and embedded microcontroller (MCU), has become the focus of attention in many biomedical applications. A review of the microsystems technology is presented in this paper, along with a discussion of the recent trends and challenges associated with its developments. A basic description of each sub-system is also given. This includes the different front end, mixed analog-digital, power management, and radio transmitter-receiver circuits. These sub-system designs are presented and discussed in a comparative study and final remarks are made. The performance of each sub-system is assessed regarding many aspects related to the overall system performance. [ABSTRACT FROM AUTHOR]