Key result
A fully integrated ASIC sensor for recording multiple bio-electric signals was successfully verified in in-vivo experiments, enabling synchronous processing of up to 14-channel bio-signals.
The developed ASIC sensor and 2-wire data transmission protocol enable a scalable wearable healthcare system for synchronous processing of up to 14-channel bio-signals.
Supports scalable wearable multi-channel bio-signal systems; leaves open clinical validation for cardiovascular applications.
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.
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Yang et al. (2012) studied this question. ASIC sensor with integrated 2-wire data transmission protocol was evaluated on in-vivo bio-electric recording experiments. A fully integrated ASIC sensor for recording multiple bio-electric signals was successfully verified in in-vivo experiments, enabling synchronous processing of up to 14-channel bio-signals.
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