Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Feedback control systems

Feedback control systems

Feedback control systems are categorized in various ways based on their design, analysis, and signal types.
Linear feedback systems are theoretical models that simplify analysis and design. These systems operate under the principle that their output is directly proportional to their input within certain ranges. For instance, an amplifier in a control system behaves linearly as long as the input signal remains within a specific range. However, most physical systems exhibit inherent nonlinearity...

You might also read

Related Articles

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

Sort by

Same author

The increasing threat to European forests from the invasive foliar pine pathogen, <i>Lecanosticta acicola</i>.

Forest ecology and management·2023

Same author

Evaluation of Papillomacular Nerve Fiber Bundle Thickness in Glaucoma Patients with Visual Acuity Disturbance.

Current eye research·2019

Same author

Sustained-Release Tacrolimus Stabilizes Decline of Forced Expiratory Volume in 1 Second Through Decreasing Fluctuation of Its Trough Blood Level.

Transplantation proceedings·2018

Same author

Nationwide investigation of Shiga toxin-producing Escherichia coli among cattle in Japan revealed the risk factors and potentially virulent subgroups.

Epidemiology and infection·2017

Same author

Metabolic Fate of β-Aspartyl-(14)C-glycine in Normal Young Rats.

Bioscience, biotechnology, and biochemistry·2016

Same author

Distinguishable epidemics of multidrug-resistant Salmonella Typhimurium DT104 in different hosts.

Science (New York, N.Y.)·2013

Search research articles

Related Experiment Video

Updated: Apr 1, 2026

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Published on: March 2, 2011

Low-noise and high-speed photodetection system using optical feedback with a current amplification function.

¹National Institute of Information and Communications Technology, Tokyo 184-8795, Japan.

The Review of Scientific Instruments

|October 3, 2015

Summary

This study presents an optical-feedback photodetection system that overcomes transimpedance amplifier limitations. The novel design achieves high current gain with improved sensitivity and response for sensitive light detection.

More Related Videos

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Published on: May 5, 2016

Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Published on: September 5, 2012

Related Experiment Videos

Last Updated: Apr 1, 2026

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

Published on: March 2, 2011

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Multicolor Fluorescence Detection for Droplet Microfluidics Using Optical Fibers

Published on: May 5, 2016

Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Optical Recording of Suprathreshold Neural Activity with Single-cell and Single-spike Resolution

Published on: September 5, 2012

Area of Science:

Optoelectronics
Photodetection Systems
Electronic Amplification

Background:

Transimpedance amplifiers (TIAs) with high feedback resistors have drawbacks.
Optical feedback offers a potential solution to TIA limitations.

Purpose of the Study:

To develop and characterize a novel optical-feedback photodetection system.
To improve the sensitivity and response trade-off in photodetection.

Main Methods:

Fabrication of an optical-feedback circuit with current amplification.
Utilizing an optical output from the feedback light source for current gain.
Derivation of input-referred noise current expression for the system.
Experimental validation using an InGaAs pin photodiode.

Main Results:

Achieved a current gain with no theoretical limit.
Measured noise equivalent power of 1.7 fW/Hz(1/2) at 10 Hz and 1.3 μm.
Demonstrated significant improvement in the sensitivity-response trade-off.
Observed a 50% rise time increase from 3.1 μs to 15 μs with decreasing photocurrent.

Conclusions:

The optical-feedback photodetection system effectively minimizes TIA drawbacks.
The system offers superior sensitivity and response compared to traditional TIAs.
Further optimization may be needed for very low photocurrent applications.