A CMOS-Based Tactile Sensor for Continuous Blood Pressure Monitoring

TL;DR

This paper introduces a CMOS-based tactile sensor array capable of continuous, non-invasive blood pressure monitoring, offering an alternative to traditional cuff-based methods by enabling real-time data collection.

Contribution

The work presents a monolithic integrated capacitive tactile sensor fabricated in CMOS technology with high-resolution detection for continuous blood pressure measurement.

Findings

Achieved 12-bit resolution in blood pressure sensing

Operates at a sampling rate of 128kS/s

Enables non-invasive, continuous blood pressure monitoring

Abstract

A monolithic integrated tactile sensor array is presented, which is used to perform non-invasive blood pressure monitoring of a patient. The advantage of this device compared to a hand cuff based approach is the capability of recording continuous blood pressure data. The capacitive, membrane-based sensor device is fabricated in an industrial CMOS-technology combined with post-CMOS micromachining. The capacitance change is detected by a S?-modulator. The modulator is operated at a sampling rate of 128kS/s and achieves a resolution of 12bit with an external decimation filter and an OSR of 128.