| Summary: | 碩士 === 龍華科技大學 === 電子工程系碩士班 === 101 === For medical purposes, there is a growing demand for portable bio-potentials signals systems. We hope that patients can wear the small-size and light-weight devices for long-term monitoring. A 1.2-V low power programmable CMOS analog front-end IC for biomedical signal acquisition is presented. Our design deal with Electrocardiogram (ECG), Electromyogram (EMG), and Electroencephalogram (EEG) signals, while reject DEO (Differential Electrode Offset), common-mode disturbance, and solve flicker noise by chopper-stabilized technique with an AC feedback circuit. The instrumentation amplifier achieves 1.5 nV/sqHz input-referred noise floor and the noise-efficient factor (NEF) of 5. The programmable gain amplifier (PGA) sets voltage gain and bandwidth via digital interface, which could be integrated with DSP easily. The power consumption of the front-end amplifiers is 1.84μW. The total power consumption is 230μW (output buffer and biasing circuits are excluded). The chip is realized in TSMC 1P6M 0.18μm CMOS process. The active die area is 0.88mmX0.43mm.
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