Analog Devices is aiming at wearable patient monitoring devices with an analogue front-end for four vital signs: electrocardiogram, heart rate, blood-oxygen saturation and respiration rate. The chip, MAX86178, does this with three channels, one each for: photodiodes (optical PPG for blood oxygen and heart rate), voltages (electrocardiogram (‘ECG’ or ‘EKG’) and alternative heart rate) and bio-impedance ...

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