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Related Experiment Video

Updated: Jun 26, 2026

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Patient Directed Recording of a Bipolar Three-Lead Electrocardiogram using a Smartwatch with ECG Function

Published on: December 11, 2019

Low-power signal processing devices for portable ECG detection.

Shuenn-Yuh Lee¹, Chih-Jen Cheng, Cheng-Pin Wang

¹Department of Electrical Engineering National Chung-Cheng University Chia-Yi, Taiwan.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference

|January 24, 2009

Summary

This summary is machine-generated.

This paper introduces a low-power analog front end for heart monitoring, featuring a Butterworth filter and an analog-to-digital converter. The system achieves minimal power consumption for efficient cardiac diagnostics.

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Area of Science:

Biomedical Engineering
Analog Integrated Circuit Design
Cardiovascular Monitoring

Background:

Accurate diagnosis and continuous monitoring of heart behavior are crucial in cardiovascular healthcare.
Existing systems often face challenges with power consumption and miniaturization.

Purpose of the Study:

To present a novel, ultra-low-power analog front end for cardiac monitoring applications.
To detail the design and performance of key integrated circuits within the system.

Main Methods:

Fabrication of a 5th-order Butterworth operational transconductance-C (OTA-C) filter and an 8-bit successive approximation analog-to-digital converter (SAADC).
Utilizing a 0.18-microm CMOS technology for component integration.
Characterization of power consumption, output noise, and linearity.

Main Results:

The operational transconductance-C filter exhibits a power consumption of 453 nW.
The successive approximation analog-to-digital converter consumes 940 nW.
Both components operate at a supply voltage of 1 V, demonstrating significant power efficiency.

Conclusions:

The developed analog front end offers a highly power-efficient solution for cardiac monitoring.
The integrated filter and ADC meet essential system specifications for noise and linearity.
This technology holds promise for advanced, portable, and long-term cardiac diagnostic devices.