With the improvement of the living standards, people are paying more and more attention to their health. The development of the Body Sensor Network (BSN) technology makes it possible to continuously monitor physiological parameters such as electrocardiograph (ECG), respiratory rate, electroencephalograph (EEG), arterial oxygen saturation (SpO2), body temperature, etc for a long time. In this paper, we proposed a design of a compact, ultra low-power, high-integrated physiological parameters monitoring node. The standout advantages of the proposed BSN nodes are as follows: 1) very compact: the size of the health monitoring node circuit board is only 82mm × 32mm; 2) ultra low-power consumption: the node can work for more than 120hours continuously when powered by a battery with 1900mAh; 3) highly integrated: the ECG, respiration and body temperature monitoring functions are all integrated into the small circuit board; 4) flexible communication interface: the sensed data could be transmitted through Zigbee to the gateway and then to the remote medical center for pathological analyzing or to the data base for storage through the internet, and the sensor node could also directly connect to a smart mobile phone or other end-device by the integrated Bluetooth.
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