A 300-mV 220-nW Event-Driven ADC With Real-Time QRS Detection for Wearable ECG Sensors

作者：Zhang Xiaoyang^*; Lian Yong

来源：IEEE Transactions on Biomedical Circuits and Systems, 2014, 8(6): 834-843.

DOI：10.1109/TBCAS.2013.2296942

• Analog-to-digital converter (ADC)
• analog-to-information (A2I)
• asynchronous
• continuous-time
• electrocardiogram (ECG) monitoring
• event-driven
• level-crossing
• pulse-triggered
• QRS detection
• wireless body sensor network (WBSN)

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 mu m 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.

• 出版日期2014-12