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Related Experiment Videos

A bio-amplifier with pulse output.

Du Chen1, John G Harris, Jose C Principe

  • 1Department of Electrical and Computer Engineering, University of Florida, Gainesville, FL, USA.

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|February 3, 2007
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This study introduces a novel low-power bioamplifier that converts analog signals into a pulse train for efficient, noise-resistant transmission. The original signal can be precisely reconstructed remotely, enabling low-power biomedical monitoring.

Area of Science:

  • Biomedical Engineering
  • Integrated Circuit Design
  • Signal Processing

Background:

  • Electrode-tissue interfaces generate significant DC offsets, complicating bio-signal amplification.
  • Traditional amplification methods can be power-intensive and susceptible to noise.
  • Efficient, low-power signal transmission is crucial for implantable and wearable biomedical devices.

Purpose of the Study:

  • To develop a fully integrated, low-power bioamplifier capable of amplifying biological signals across a wide frequency range (mHz to kHz).
  • To address the challenge of large DC offsets from electrode-tissue interfaces.
  • To implement a novel analog-to-pulse-train conversion for low-power, noise-resistant data transmission and remote signal reconstruction.

Main Methods:

  • Design and fabrication of a fully integrated bioamplifier using AMI 0.6 microm CMOS technology.

Related Experiment Videos

  • Implementation of an analog output stage that generates a pulse train representing the amplified analog signal.
  • Characterization of the amplifier's gain, frequency response, power consumption, and chip area.

    • Main Results:

    • The bioamplifier achieves a gain of 39.5 dB over a frequency range of 0.3 Hz to 5.4 kHz.
    • The system demonstrates low power consumption, less than 300 microW/channel from a 5-V supply.
    • The analog signal can be reconstructed from the pulse train with 13-bit precision.
    • The integrated system occupies a small chip area of 0.088 mm(2)/channel.

    Conclusions:

    • The developed low-power bioamplifier effectively amplifies biological signals while rejecting DC offsets.
    • The pulse train output offers a power-efficient and noise-resistant method for transmitting biomedical data.
    • This technology enables precise remote reconstruction of analog signals, suitable for advanced biomedical monitoring systems.