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Related Experiment Videos

A system oriented electrocardiographic amplifier.

J W Cox, J S Laughter, C W Brandon

    Cardiovascular Research
    |April 1, 1979
    PubMed
    Summary
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    A new low-noise amplifier for electrocardiogram (ECG) data acquisition offers programmable gain and offset control. This versatile device enhances ECG signal recording in diverse environments.

    Area of Science:

    • Biomedical Engineering
    • Signal Processing
    • Medical Instrumentation

    Background:

    • Electrocardiogram (ECG) signal acquisition is crucial for cardiac monitoring.
    • Existing amplifiers may struggle with noise and adaptability across different recording environments.
    • The need for flexible and high-fidelity ECG amplifiers is persistent.

    Purpose of the Study:

    • To develop a low-noise, programmable gain amplifier specifically for ECG data acquisition.
    • To enhance the versatility and performance of ECG recording systems.
    • To provide precise control over signal amplification and offset parameters.

    Main Methods:

    • Designed a low-noise differential input stage with 4µV peak-to-peak noise.
    • Implemented digitally programmable gain (100x to 16000x) via a serial interface.

    Related Experiment Videos

  • Integrated selectable low-frequency response (0.04 Hz or 0.08 Hz) and an output monitor multiplexer.

    • Main Results:

    • Achieved a low noise floor suitable for sensitive ECG measurements.
    • Demonstrated precise digital control over gain and DC offset ranges (-3.5 to +4 V).
    • Enabled external selection of low-frequency cutoff and on-board signal monitoring.

    Conclusions:

    • The developed amplifier offers a robust solution for high-quality ECG acquisition.
    • Its programmability and low-noise characteristics make it suitable for various recording scenarios.
    • This device advances the capabilities of portable and clinical ECG monitoring systems.