Low-power system-on-chip implementation for respiratory rate detection and transmission

Area of Science:

• Biomedical Engineering
• Wearable Technology
• Sensor Technology

Background:

• Non-invasive respiratory rate monitoring is crucial for patient care.
• Existing biosensors often limit mobility or require frequent battery changes.
• Low power consumption is essential for self-powered or long-lasting wearable sensors.

Purpose of the Study:

• To demonstrate a feasible low-power biosensor for respiratory rate measurement.
• To explore the use of respiratory effort for sensor power scavenging.
• To reduce the overall power consumption of respiratory monitoring systems.

Main Methods:

• Developed a system-on-chip (SoC) utilizing a comparator in place of an analog-to-digital converter (ADC).
• Focused on minimizing sensor power usage to enable energy harvesting from respiratory effort.
• Integrated respiratory rate detection and wireless data transmission capabilities.

Main Results:

• Achieved a total system power consumption below 82 µW.
• Demonstrated significant power savings compared to traditional ADC-based biosensors.
• Wireless data transmission accounted for less than 30% of the total power consumption.

Conclusions:

• The comparator-based approach is feasible for low-power respiratory rate monitoring.
• The developed SoC offers a power-efficient solution for non-invasive respiratory sensing.
• This technology has the potential for self-powered wearable respiratory monitoring systems.