Flexible SAR ADC with resistive DAC for Conformable On-Body Sensing Applications

Feras Alkhalil, Thom Smith, Haibo Su, Francisco J. Rodríguez, Adam Rearden, Brian A. Cobb

20222022 IEEE Biomedical Circuits and Systems Conference (BioCAS)12 citationsDOI

Abstract

Flexible Integrated Circuits (FlexICs) allow for ultra-thin intelligence to be added to wearable systems, reducing or eliminating the need for bulky rigid components and dramatically improving both form factor and cost of the final device. A flexible Successive Approximation Register Analog to Digital Converter (SAR-ADC) utilizing a resistive Digital to Analog Converter (DAC) has been demonstrated, allowing for an electrical interface to external transducers. Alongside approaches to simplify on-device calculation and wireless communication which have been validated in FlexICs, the design and included building blocks may be customized to enable a wide range of on-body sensing applications oriented towards comfortable, unintrusive monitoring approaches.

Topics & Concepts

Conformable matrixSuccessive approximation ADCResistive touchscreenComputer scienceTransducerElectronic engineeringAmplifierWearable computerWirelessAnalog-to-digital converterElectronic circuitInterface (matter)Electrical engineeringCapacitorComputer hardwareEmbedded systemEngineeringCMOSMaterials scienceTelecommunicationsVoltageComputer visionBubbleMaximum bubble pressure methodParallel computingComposite materialAdvanced Sensor and Energy Harvesting MaterialsAnalog and Mixed-Signal Circuit DesignCCD and CMOS Imaging Sensors