Integrated Circuit Designs for a Multi-signal Biomedical Signal Recording Chip

• Main Authors: Ding-Zhi Lin, 林鼎智
• Other Authors: Robert Rieger
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/q4ebx7

碩士 === 國立中山大學 === 電機工程學系研究所 === 106 === With the advance of mobile healthcare and the Internet-of-things increasing numbers of applications incorporate low-power miniature sensing devices for various types of input signal. In the health and fitness market, devices monitor rehabilitation progress, quantify personal body condition, map activity, and often provide means for data integration within the front-end or via a network. This thesis focuses on the microelectronic biomedical chip for real-time measurement in the target application of a wearable monitoring system for athletes or rehabilitation. The circuit is divided into three main parts: the temperature readout, the piezoelectric vibration readout circuit, and the variable gain amplifier circuit system to sense the electrocardiograms or muscle activity. The vibration readout uses an external piezoelectric transducer foil which converts strain to voltage that is then conditioned and acquired by the integrated amplifier. The variable gain amplifier circuit connect to external gel electrode patches. It incorporates digitally controlled offset compensation which enables tracking and compensating for varying electrode offset in real-time. Also the amplifier gain is variable during operation to provide a good match for the amplitude of the signal input. The system is designed and implemented in TSMC 0.18um CMOS process technology in a small active circuit area of 321.2um * 383.2um. Measured results are reported which confirm the intended operation.