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

  • Authors:

  • Geng Yang;Jian Chen;Fredrik Jonsson;Hannu Tenhunen;Li-Rong Zheng

  • Affiliations:

  • Royal Institute of Technology (KTH), Stockholm, Sweden;Royal Institute of Technology (KTH), Stockholm, Sweden;Royal Institute of Technology (KTH), Stockholm, Sweden;Royal Institute of Technology (KTH), Stockholm, Sweden;Royal Institute of Technology (KTH), Stockholm, Sweden and Fudan University, Shanghai, P.R. China

  • Venue:
  • DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
  • Year:
  • 2012

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Abstract

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 x 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.