title: A low power level-crossing ADC for wearable wireless ECG sensors.
abstract: Ultra-low power consumption is desired in most wearable biomedical devices. The event-driven based Analog-to-Digital converter (ADC) could be an excellent candidate for low power system because of the reduction in sampling points for biosignals. In the existing event-driven based ADC architectures, two or more high precision comparators are utilized to sample the input signal. In this paper, we propose a new scheme utilizing only one high precision comparator to genertate samples with the assistance of a low precision one. From the Matlab simulations on real ECG signal, it is shown that around 25% reduction on the number of samples can be be achieved compared with the Nyquist sampling scheme.
authors.lastname: Zhenzhen Tian
authors.lastname: Rendong Ying
authors.lastname: Peilin Liu
authors.lastname: Guoxing Wang
authors.lastname: Yong Lian
mesh_terms: D000703:Analog-Digital Conversion; D004562:Electrocardiography / Q000295:instrumentation* / Q000379:methods; D006801:Humans; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation