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

Protein-protein Interfaces02:04

Protein-protein Interfaces

14.7K
Many proteins form complexes to carry out their functions, making protein-protein interactions (PPIs) essential for an organism's survival. Most PPIs are stabilized by numerous weak noncovalent chemical forces. The physical shape of the interfaces determines the way two proteins interact. Many globular proteins have closely-matching shapes on their surfaces, which form a large number of weak bonds. Additionally, many PPIs occur between two helices or between a surface cleft and a...
14.7K
Protein-Protein Interfaces02:04

Protein-Protein Interfaces

4.5K
4.5K
Passive Filters01:27

Passive Filters

1.0K
Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
1.0K
Active versus Passive Immunity01:31

Active versus Passive Immunity

10.8K
Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...
10.8K
Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)01:20

Spin–Spin Coupling: Two-Bond Coupling (Geminal Coupling)

1.7K
Two NMR-active nuclei bonded to a central atom can be involved in geminal or two-bond coupling. Geminal coupling is commonly seen between diastereotopic protons in chiral molecules and unsymmetrical alkenes, among others.
The central atom need not be NMR-active because its electrons are affected by the electron polarization of the spin-active atoms. However, spin information is transmitted less effectively than in one-bond coupling, and 2J values are usually weaker than 1J values. The energy of...
1.7K
Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)01:22

Spin–Spin Coupling: Three-Bond Coupling (Vicinal Coupling)

1.5K
Vicinal or three-bond coupling is commonly observed between protons attached to adjacent carbons. Here, nuclear spin information is primarily transferred via electron spin interactions between adjacent C‑H bond orbitals. This generally favors the antiparallel arrangement of spins, so 3J values are usually positive.
The extent of coupling depends on the C‑C bond length, the two H‑C‑C angles, any electron-withdrawing substituents, and the dihedral angle between the involved orbitals. The...
1.5K

You might also read

Related Articles

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

Sort by
Same author

A MEMS Variable Reluctance Sensor for Contactless Detection of a Ferrous Rotating Target.

Sensors (Basel, Switzerland)·2026
Same author

Editorial for the Special Issue on Micromachined Acoustic Transducers for Audio-Frequency Range.

Micromachines·2025
Same author

Self-Diagnostic and Self-Compensation Methods for Resistive Displacement Sensors Tailored for In-Field Implementation.

Sensors (Basel, Switzerland)·2024
Same author

Objective Evaluation of Active Interactions between the Operator and Display Screen Equipment Using an Innovative Acquisition System.

Bioengineering (Basel, Switzerland)·2023
Same author

Flexible Passive Sensor Patch with Contactless Readout for Measurement of Human Body Temperature.

Biosensors·2023
Same author

Optimization of an Impact-Based Frequency Up-Converted Piezoelectric Vibration Energy Harvester for Wearable Devices.

Sensors (Basel, Switzerland)·2023

Related Experiment Video

Updated: Feb 2, 2026

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
10:52

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Published on: March 8, 2020

6.2K

Interrogation Techniques and Interface Circuits for Coil-Coupled Passive Sensors.

Marco Demori1, Marco Baù2, Marco Ferrari3

  • 1Department of Information Engineering, University of Brescia, Via Branze, 38-25123 Brescia, Italy. marco.demori@unibs.it.

Micromachines
|November 15, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces a novel compensation circuit for coil-coupled resonant sensors, enabling distance-independent readings. This innovation overcomes parasitic capacitance issues, ensuring accurate measurements in proximity sensing applications.

Keywords:
coil-coupled sensordistance-independent contactless interrogationpassive sensor unitresonant sensortelemetric sensor

More Related Videos

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

6.1K
Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins
11:14

Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins

Published on: January 6, 2017

8.4K

Related Experiment Videos

Last Updated: Feb 2, 2026

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing
10:52

Design, Instrumentation and Usage Protocols for Distributed In Situ Thermal Hot Spots Monitoring in Electric Coils using FBG Sensor Multiplexing

Published on: March 8, 2020

6.2K
Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors
06:17

Quantifying the Relative Thickness of Conductive Ferromagnetic Materials Using Detector Coil-Based Pulsed Eddy Current Sensors

Published on: January 16, 2020

6.1K
Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins
11:14

Combining Wet and Dry Lab Techniques to Guide the Crystallization of Large Coiled-coil Containing Proteins

Published on: January 6, 2017

8.4K

Area of Science:

  • Electrical Engineering
  • Sensor Technology
  • Physics

Background:

  • Coil-coupled passive sensors utilize magnetic coupling for contactless interrogation.
  • Resonant sensor units, including capacitive and piezoelectric types, provide readout signals like resonant frequency and quality factor.
  • Existing interrogation techniques theoretically offer distance independence, but parasitic capacitance poses a challenge.

Purpose of the Study:

  • To analyze the impact of parasitic capacitance on coil-coupled resonant sensor readings.
  • To develop and validate a compensation circuit for achieving distance-independent sensor measurements.
  • To demonstrate the effectiveness of the proposed solution for both capacitive and piezoelectric sensors.

Main Methods:

  • Analysis of frequency-domain and time-domain interrogation techniques for resonant sensors.
  • Theoretical investigation of parasitic capacitance effects on sensor readings.
  • Development and experimental validation of an innovative compensation circuit.
  • Testing with coil-coupled capacitance and quartz crystal resonators.

Main Results:

  • Parasitic capacitance introduces undesired distance dependence in sensor readings, particularly for capacitive sensors.
  • The proposed compensation circuit effectively counteracts parasitic capacitance effects.
  • Experimental tests showed minimal deviations (300 ppm for capacitance, 0.5 ppm for quartz) within 18 mm interrogation distances.
  • Distance-independent readings were achieved under real operating conditions.

Conclusions:

  • The developed compensation circuit successfully enables distance-independent interrogation of coil-coupled resonant sensors.
  • This advancement is crucial for reliable proximity sensing applications, especially with capacitive sensors.
  • The technique offers high accuracy and minimal error, enhancing the performance of wireless sensor systems.