A 52 μw Heart-Rate Measurement Interface Fabricated on a Flexible Foil with A-IGZO TFTs
conference paper
This paper presents a 52 μW heart-rate measurement interface for wearable applications, fabricated on a flexible foil with a-IGZO TFTs. The interface consists of a cascaded diode-connected load preamplifier with a gain of 22 dB in 3 kHz bandwidth. The output is provided as a binary PWM waveform, which can be sent to a reader device using wireless communication. Voltage to pulse-width conversion is achieved with a simple and power minimalistic approach, which exploits a reset integrator. Experimental characterization demonstrates an overall low-frequency gain of the system equal to 25 msec/V and an input referred noise of 186.3 μV rms. In-vivo measurements have been performed, resulting in a 60 bpm heart-rate for a person at rest. © 2018 IEEE.
Topics
Bio-signal read outPWMvoltage to pulse width conversionFabricationHeartPulse width modulationSemiconducting indium compoundsWireless telecommunication systems1/F noiseBiosignalsExperimental characterizationHeart rate measurementsIGZOPulsewidthsWearable applicationsWireless communicationsThin film transistors
TNO Identifier
843677
ISBN
9781538654040
Publisher
Institute of Electrical and Electronics Engineers Inc.
Article nr.
8494298
Source title
44th IEEE European Solid State Circuits Conference, ESSCIRC 2018, 3 September 2018 through 6 September 2018
Pages
126-129
Files
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