A Sleep Apnea Monitoring IC for Respiration, Heart-Rate, SpO(2) and Pulse-Transit Time Measurement Using Thermistor, PPG and Body-Channel Communication

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This paper presents a low power bio-signal acquisition system for sleep apnea, which can measure respiration, heart rate, SpO(2), and pulse transit time (PTT). For respiration, a nasal airflow sensor with a thermistor is used. For PTT that can serve as a surrogate for blood pressure during sleep, two photoplethysmogram (PPG) sensors are employed at the upper arm and the finger. For improved comfort during sleep, body channel communication (BCC) is used to remove long wires. To reduce power consumption and circuit complexity, sensor's analog front-end is implemented by using a current-controlled oscillator which is also shared by BCC transmitter that employs analog frequency modulation. Implemented in 0.18 mu m CMOS, the proposed IC consumes less than 3.6 mW from a 1.8 V supply, while occupying 0.145 mm(2) of active area.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2020-02
Language
English
Article Type
Article
Citation

IEEE SENSORS JOURNAL, v.20, no.4, pp.1997 - 2007

ISSN
1530-437X
DOI
10.1109/JSEN.2019.2950367
URI
http://hdl.handle.net/10203/272397
Appears in Collection
EE-Journal Papers(저널논문)
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