Wide-Range Low-Power CMOS BandPass Filter for ECG Application

• Main Authors: Lee, Chien-Hsun, 李建勳
• Other Authors: Hung, Chung-Chih
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/23207365873915380282

碩士 === 國立交通大學 === 電機學院電信學程 === 104 === Nowadays, in the aging society with fewer children, people need more medical services, especially health management, and all aspects of home care has become a common trend in the world, in which the heart signal monitoring system is a combination of medicine and technology. In this thesis, a CMOS Gm-C filter based on operational transconductance amplifiers (OTAs) with low power and center frequency tuning ability for Bio-analytical applications is proposed. The OTA uses source degeneration to increase the linearity. In order to achieve low power consumption, MOSFETs are designed to work in the weak inversion region. The transconductance and center frequency of the filter can be tuned by changing its bias current. A Fourth-Order Butterworth LC ladder Gm-C bandpass filter implemented with the OTAs was fabricated by TSMC 0.18-μm 1P6M CMOS process. The total power consumption is 410nW and Total Harmonic Distortion is -59.60dB when the Gm-C filter operates at 1.8V power supply. The active area is 0.064mm2.