A portable SoC-based ECG-system for 24h x 7d operating time

Abstract

A portable battery powered 3-channel ECG-system is presented. This system can be operated up to 10 days by two standard AA batteries. It acquires 3 ECG signals with 16 bit resolution using a dedicated System on Chip (SoC) with an embedded DSP for power efficient data handling. The digitized data are filtered with an 80 th order FIR filter and stored on a Compact Flash (CF) card that can be read out using a standard PC operating system. Combining high performance analog parts for signal acquisition and a powerful DSP on a single chip opens up innovative possibilities in reduction of system size and power consumption.

An Integrated Multi-Channel System for Biomedical Signal Acquisition

“…• A 9 channel ECG system would occupy only few cm² and consuming less than 50 mW. This would allow using only two standard AA batteries for an application time of more than one week (Galjan et al, 2008).…”

“…In this context, the AFE is the prime candidate for configurability. Two complementary application examples illustrate this: For portable long-term monitoring of electrocardiogram (ECG) signals the system's power consumption plays an essential role whereas noise constraints are rather relaxed (Martin et al, 2000;Galjan et al, 2008). In contrast to this, for extremely sensitive evoked potential (EP) recordings (Scheer et al, 2006), low-noise amplification of the signal is crucial at the expense of rather high power consumption.…”