Chip Design of a Biopotential Recording Front-End for Biopotential Acquisition Systems

• Main Authors: LU, CHING-JU, 陸敬儒
• Other Authors: LEE, WEN-TA
• Format: Others
• Language: en_US
• Published: 2019
• Online Access: http://ndltd.ncl.edu.tw/handle/74w772

碩士 === 國立臺北科技大學 === 電子工程系 === 107 === The acquisition of biomedical signals has always been an integral part of human health assessment and monitoring. To this end, this thesis presents the chip design of a biopotential recording front-end for biopotential acquisition systems. It can effectively lower the area and power consumption for the systems to achieve the purpose of multiple sensing modalities and system miniaturization. In chip design, low-noise circuit design techniques have been adopted to implement the overall circuit. Functionally, the chip has a tunable high-pass corner frequency (0.03-160 Hz) and a fixed low-pass corner frequency (10.8 kHz). At the same time, it can also support up to sixteen variable gain settings to provide different amplification for various types of biopotentials. In chip verification, we have used the TSMC 0.18-μm 1P6M CMOS process to fabricate a biopotential recording front-end chip for biopotential acquisition. Under a 1.8 V supply, the chip exhibits an input-referred noise of approximately 3.32 μVrms (0.1-100 Hz), consumes 69.7 μW, and has a core area of 0.23 mm2. In addition, the chip has a total harmonic distortion of 1% at an input signal of 4 mVpp. The experimental results have shown that this chip can effectively capture some human physiological signals, such as ECG and EMG signals. In the future, it can be applied to portable and wearable health monitoring devices.