A Low Power CMOS Front-End for Photoplethysmographic Signal Acquisition with Robust DC Photocurrent Rejection
文献类型：会议论文
| 作者 | Wong, Alex K. Y. ; Pun, Kong-Pang ; Zhang, Yuan-Ting ; Leung, Ka Nang |
| 出版日期 | 2007 |
| 会议名称 | 4th IEEE/EMBS International Summer School and Symposium on Medical Devices and Biosensors |
| 会议地点 | Cambridge |
| 英文摘要 | A micro-power CMOs front-end for photoplethysmographic signal (PPG) acquisition is presented. The circuit is composed of a transimpedance amplifier (TIA), post amplifier and low-pass filter. The TIA is configured with a sample-and-hold (S/H), an error amplifier and a current-sink transistor in feedback to reject DC photocurrent generated from photodiode, which varies from person to person. To reduce power consumption, the LED is pulsed and thus the input to the TIA is a modulated current pulse. The low-pass filter is implemented by using the current-steering technique (CST). The proposed circuit is designed to generate PPG waveform with a fixed DC output to prevent signal saturation by rejecting the input pulsating DC photocurrent from modulated signal. Experimental results show that the circuit works properly from a 2.5-V power supply with a bandpass frequency from 0.1 Hz to 6.5 Hz and has a rejection range from 0.1 mu A to 53.6 mu A. |
| 收录类别 | EI |
| 语种 | 英语 |
| 源URL | [http://ir.siat.ac.cn:8080/handle/172644/2104]  |
| 专题 | 深圳先进技术研究院_医工所 |
| 推荐引用方式 GB/T 7714 | Wong, Alex K. Y.,Pun, Kong-Pang,Zhang, Yuan-Ting,et al. A Low Power CMOS Front-End for Photoplethysmographic Signal Acquisition with Robust DC Photocurrent Rejection[C]. 见:4th IEEE/EMBS International Summer School and Symposium on Medical Devices and Biosensors. Cambridge. |
入库方式： OAI收割
来源：深圳先进技术研究院
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