title: A 300-mV 220-nW event-driven ADC with real-time QRS detection for wearable ECG sensors.
abstract: This paper presents an ultra-low-power event-driven analog-to-digital converter (ADC) with real-time QRS detection for wearable electrocardiogram (ECG) sensors in wireless body sensor network (WBSN) applications. Two QRS detection algorithms, pulse-triggered (PUT) and time-assisted PUT (t-PUT), are proposed based on the level-crossing events generated from the ADC. The PUT detector achieves 97.63% sensitivity and 97.33% positive prediction in simulation on the MIT-BIH Arrhythmia Database. The t-PUT improves the sensitivity and positive prediction to 97.76% and 98.59% respectively. Fabricated in 0.13 μm CMOS technology, the ADC with QRS detector consumes only 220 nW measured under 300 mV power supply, making it the first nanoWatt compact analog-to-information (A2I) converter with embedded QRS detector.
authors.forename: Xiaoyang
authors.initials: X
authors.lastname: Zhang
authors.forename: Yong
authors.initials: Y
authors.lastname: Lian
mesh_terms: D001145:Arrhythmias, Cardiac / Q000503:physiopathology; D016208:Databases, Factual; D004562:Electrocardiography / Q000295:instrumentation* / Q000379:methods*; D006801:Humans; D008991:Monitoring, Physiologic; D058998:Remote Sensing Technology / Q000295:instrumentation* / Q000379:methods*