⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种耳后贴片式心理健康监护集成接口，通过275倍输入阻抗提升和自适应M技术解决了传统接口在高频区域阻抗不足的问题。同时采用10b DR-EPFL双CDAC环路结构（6b粗调和4b精调），并针对PPG通道中光电二极管寄生电容导致的线性度恶化进行了优化。
Hanyang University, Seoul, Korea 4 SOSO H&C, Daegu, Korea 1 To overcome this limitation, a 10b DR-EPFL is proposed to have two CDAC loops of 6b coarse and 4b fine, where the fine CDAC is designed to provide equivalently much smaller unit capacitance through the attenuator. This DR-EPFL effect to improve high-frequency region of the input impedance can be seen in the upper right of Fig. 32.1.2. In case of the LDC-type PPG channel, the intrinsic parasitic capacitance of photodiode (Cp_pd) can seriously degrades the linearity of the system by generating the offset voltage. Therefore, a photodiode pre-charge scheme is proposed to compensate this Cp_pd effect. According to the equation shown in Fig. 32.1.3, a constant reference voltage is precharged to Cp_pd
Hyunjoong Kim1, Myeongwoo Kim1, Kwangmuk Lee2, Sanghyeon Cho1,
Chan Sam Park1, Solwoong Song3, Dae Sik Keum4, Dong Pyo Jang3, Jae Joon Kim1 Ulsan National Institute of Science and Technology, Ulsan, Korea Samsung Electronics, Hwaseong, Korea 3