A multi-parameter bio-electric ASIC sensor with integrated 2-wire data transmission protocol for wearable healthcare system

This paper presents a fully integrated application specific integrated circuit (ASIC) sensor for the recording of multiple bio-electric signals. It consists of an analog front-end circuit with tunable bandwidth and programmable gain, a 6-input 8-bit successive approximation register analog to digital converter (SAR ADC), and a reconfigurable digital core. The ASIC is fabricated in a 0.18-μm 1P6M CMOS technology, occupies an area of 1.5 × 3.0 mm2, and totally consumes a current of 16.7 μA from a 1.2 V supply. Incorporated with the ASIC, an Intelligent Electrode can be dynamically configured for on-site measurement of different bio-signals. A 2-wire data transmission protocol is also integrated on chip. It enables the serial connection over a group of Intelligent Electrodes, thus minimizes the number of connecting cables. A wearable healthcare system is built upon a printed Active Cable and a scalable number of Intelligent Electrodes. The system allows synchronous processing of maximum 14-channel bio-signals. The ASIC performance has been successfully verified in in-vivo bio-electric recording experiments.

[1]  David Lowe,et al.  EEG/ECG information fusion for epileptic event detection , 2009, 2009 16th International Conference on Digital Signal Processing.

[2]  Geng Yang,et al.  Electrical performance of inkjet printed flexible cable for ECG monitoring , 2011, 2011 IEEE 20th Conference on Electrical Performance of Electronic Packaging and Systems.

[3]  Geng Yang,et al.  A novel wearable ECG monitoring system based on active-cable and intelligent electrodes , 2008, HealthCom 2008 - 10th International Conference on e-health Networking, Applications and Services.

[4]  Yusuf Leblebici,et al.  Energy Efficient Low-Noise Neural Recording Amplifier With Enhanced Noise Efficiency Factor , 2011, IEEE Transactions on Biomedical Circuits and Systems.

[5]  Yong Lian,et al.  A 1-V 450-nW fully integrated biomedical sensor interface system , 2008, 2008 IEEE Symposium on VLSI Circuits.

[6]  Marek Wojcikowski,et al.  A field programmable analog array for CMOS continuous-time OTA-C filter applications , 2002 .

[7]  Refet Firat Yazicioglu,et al.  A 200 $\mu$ W Eight-Channel EEG Acquisition ASIC for Ambulatory EEG Systems , 2008, IEEE Journal of Solid-State Circuits.

[8]  Refet Firat Yazicioglu,et al.  A 30µW Analog Signal Processor ASIC for biomedical signal monitoring , 2010, 2010 IEEE International Solid-State Circuits Conference - (ISSCC).

[9]  Hannu Tenhunen,et al.  A 1.0 V 78 μW reconfigurable ASIC embedded in an intelligent electrode for continuous remote ECG applications , 2009, 2009 Annual International Conference of the IEEE Engineering in Medicine and Biology Society.

[10]  A. L. Lacaita,et al.  A multi-channel low-power IC for neural spike recording with data compression and narrowband 400-MHz MC-FSK wireless transmission , 2010, 2010 Proceedings of ESSCIRC.