Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Two-electrode non-differential biopotential amplifier.

D Dobrev1

  • 1Centre of Biomedical Engineering, Bulgarian Academy of Sciences, Sofia, Bulgaria. ikdas@argo.bas.bg

Medical & Biological Engineering & Computing
|November 28, 2002
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Outcome after ablation of atypical atrial flutter: Is induction a feasible approach?

International journal of cardiology. Heart & vasculature·2024
Same author

PET/CT-identified atrial hypermetabolism is an index of atrial inflammation in patients with atrial fibrillation.

Journal of nuclear cardiology : official publication of the American Society of Nuclear Cardiology·2023
Same author

Role of catheter location on local impedance measurements and clinical outcome with the new direct sense technology in cardiac ablation procedures.

International journal of cardiology. Heart & vasculature·2022
Same author

Stroke prevention of atrial fibrillation: Improving geographic under-use of contemporary antithrombotic approaches remains a challenge.

International journal of cardiology. Heart & vasculature·2021
Same author

Ectopic expression of S28A-mutated Histone H3 modulates longevity, stress resistance and cardiac function in Drosophila.

Scientific reports·2018
Same author

Current controversies in determining the main mechanisms of atrial fibrillation.

Journal of internal medicine·2016

A novel non-differential biopotential amplifier circuit emulates a differential amplifier using a current source and transimpedance amplifier. This design offers high input impedance and robust common-mode interference rejection for biosignal acquisition in noisy environments.

Area of Science:

  • Biomedical Engineering
  • Electronics Engineering

Background:

  • Traditional differential amplifiers struggle with high electromagnetic interference (EMI) common in portable biosignal acquisition.
  • Non-differential amplifiers often lack the necessary input impedance and common-mode rejection for reliable biopotential measurements in challenging environments.

Purpose of the Study:

  • To propose a novel circuit for a non-differential two-electrode biopotential amplifier that emulates a differential amplifier.
  • To achieve high signal input impedance and effective common-mode interference rejection using a simple circuit structure.

Main Methods:

  • A circuit employing a current source and a transimpedance amplifier is designed to equalize input currents.
  • The transimpedance amplifier senses input current, replicating it in the other input to emulate differential amplification.

Related Experiment Videos

  • The current source balances common-mode interference currents, enhancing input impedance.

    • Main Results:

    • The proposed circuit successfully emulates a differential amplifier with a simple structure and few components.
    • It demonstrates high signal input impedance and tolerance to common-mode interference currents exceeding 10 microA per input at +/- 5 V supply.
    • Achieves input resistances of 2 x 10 Mohm with less than 0.5 microA per input current.

    Conclusions:

    • The circuit is suitable for biosignal acquisition in portable instruments operating at low supply voltages in high EMI areas.
    • It provides a robust solution for applications like recording biosignals in electric power stations or on electric locomotives, preventing saturation of traditional amplifier stages.