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第一作者：Z. Yu

通讯作者：C. Wang*

合写作者：, X. Zhang, X. Liao, J. Wang, Z. Lu, H. Jiang, and

发表刊物：IEEE International Conference on Integrated Circuits, Technologies and Applications (ICTA 2024)

收录刊物：EI

学科门类：工学

一级学科：电子科学技术

文献类型：C

发表时间：2024-08-25

摘要：This paper proposes a low-noise AFE based on a capacitive transimpedance amplifier (CTIA) for wearable PPG sensors. By separating noise from the PPG signal, the proposed AFE applies chopping technique to the CTIA for reducing flicker noise and input-referred offset. Resistive DAC (RDAC) is adopted to substitute the conventional current DAC to suppress the noise in the dual compensation loop by replacing the high transistor noise with the lower resistor thermal noise. In 0.18-μm CMOS, the proposed AFE under 1.2 V consumes 68 μW power with an equivalent input-referred noise of 15.32 pArms. Compared with the related works, the proposed AFE reduces noise by 45.3%~83.3% with comparable power consumption and silicon area.