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 Concept Videos

Instrumentation Amplifier01:25

Instrumentation Amplifier

1.3K
An electrocardiography (ECG) machine is an essential piece of medical equipment used to monitor the electrical activity of the heart. It operates by detecting small electrical changes on the skin that result from the depolarization of the heart muscle during each heartbeat. However, these signals are in the microvolt range and can be easily overwhelmed by noise or interference.
To overcome this challenge, an ECG machine utilizes an instrumentation amplifier. This specialized amplifier is...
1.3K
Potentiometry: Membrane Electrodes01:15

Potentiometry: Membrane Electrodes

2.3K
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at...
2.3K

You might also read

Related Articles

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

Sort by
Same author

Trigonometric gradient microstructures in additively manufactured single crystals enable strength-ductility synergy and programmable performance.

Nature communications·2025
Same author

Estimating direction of arrival in reverberant environments for wake-word detection using a single structural vibration sensora).

The Journal of the Acoustical Society of America·2024
Same author

Separation of mainlobe and sidelobe contributions to B-mode ultrasound images based on the aperture spectrum.

Journal of medical imaging (Bellingham, Wash.)·2022
Same author

Compressed sensing for reduced hardware footprint in medical ultrasound.

Ultrasonics·2020
Same author

Design rules for scalability in spin-orbit electronics.

Scientific reports·2019
Same author

Portable ultrasound imaging system with super-resolution capabilities.

Ultrasonics·2018

Related Experiment Video

Updated: May 7, 2026

Measurement of Bioelectric Current with a Vibrating Probe
07:28

Measurement of Bioelectric Current with a Vibrating Probe

Published on: January 4, 2011

13.4K

Preamplifiers for non-contact capacitive biopotential measurements.

GuoChen Peng, Zeljko Ignjatovic, Mark F Bocko

    Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
    |October 11, 2013
    PubMed
    Summary

    This study compares non-contact biopotential sensing amplifier designs for ECG and EEG. Charge amplifiers excel with low capacitance electrodes (<10 pF), while voltage amplifiers are better for higher capacitances (>10 pF).

    More Related Videos

    Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
    08:22

    Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor

    Published on: February 16, 2018

    15.1K
    Time-Resolved In Vivo Measurement of Neuropeptide Dynamics by Capacitive Immunoprobe in Porcine Heart
    08:20

    Time-Resolved In Vivo Measurement of Neuropeptide Dynamics by Capacitive Immunoprobe in Porcine Heart

    Published on: May 19, 2022

    1.7K

    Related Experiment Videos

    Last Updated: May 7, 2026

    Measurement of Bioelectric Current with a Vibrating Probe
    07:28

    Measurement of Bioelectric Current with a Vibrating Probe

    Published on: January 4, 2011

    13.4K
    Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor
    08:22

    Ultrasensitive Detection of Biomarkers by Using a Molecular Imprinting Based Capacitive Biosensor

    Published on: February 16, 2018

    15.1K
    Time-Resolved In Vivo Measurement of Neuropeptide Dynamics by Capacitive Immunoprobe in Porcine Heart
    08:20

    Time-Resolved In Vivo Measurement of Neuropeptide Dynamics by Capacitive Immunoprobe in Porcine Heart

    Published on: May 19, 2022

    1.7K

    Area of Science:

    • Biomedical Engineering
    • Electronic Instrumentation
    • Signal Processing

    Background:

    • Non-contact biopotential sensing, crucial for electrocardiography (ECG) and electroencephalography (EEG), faces challenges in designing low-noise preamplifiers for high-impedance electrodes.
    • The performance of these preamplifiers is significantly influenced by electrode-to-subject coupling capacitance.

    Purpose of the Study:

    • To compare the performance of voltage and charge amplifier configurations for non-contact biopotential sensing.
    • To evaluate amplifier designs based on common-mode rejection ratio, noise, and frequency response for varying electrode capacitances.

    Main Methods:

    • Fabrication of both voltage and charge amplifier designs using the same operational-transconductance amplifier (OTA) in a 0.35 µm CMOS process.
    • Comparative analysis of common-mode rejection ratio, noise performance, and frequency response for both amplifier types.

    Main Results:

    • Charge amplifier configurations demonstrate superior performance for small electrode-to-subject coupling capacitances, typically less than 10 pF, common in non-contact electrodes.
    • Voltage amplifier configurations show advantages when electrode capacitances exceed 10 pF.

    Conclusions:

    • The choice between charge and voltage amplifier designs for non-contact biopotential sensing should be based on the specific electrode-to-subject coupling capacitance.
    • Charge amplifiers are recommended for typical non-contact electrode scenarios (<10 pF), while voltage amplifiers are suitable for higher capacitance applications.