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Related Concept Videos

Field Effect Transistor01:29

Field Effect Transistor

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Field-effect transistors (FETs) are integral to electronic circuits and distinguished by their three-terminal setup: the gate, drain, and source. These transistors operate as unipolar devices, which utilize either electrons or holes as charge carriers, in contrast to bipolar transistors, which use both types of carriers. The primary function of the FET is to modulate the flow of these carriers from the source to the drain through a channel. The voltage difference between the gate and source...
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MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

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Enhancement-mode MOSFETs are pivotal components in electronics, distinguished by their capacity to act as highly efficient switches. They are part of the larger family of metal-oxide Semiconductor Field-Effect Transistors (MOSFETs). They are available in two types: p-channel and n-channel, each tailored to specific polarity operations.
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
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Characteristics of MOSFET01:17

Characteristics of MOSFET

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Metal-oxide-semiconductor field-effect Transistors, or MOSFETs, play a critical role in electronic circuits. They are primarily utilized for amplifying and switching signals.
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
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MOSFET01:16

MOSFET

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The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) plays a pivotal role in modern electronics thanks to its versatility and efficiency in controlling electrical currents. This device, also known as IGFET, MISFET, and MOSFET, has three main terminals: the Source, Drain, and Gate. MOSFETs are classified into n-channel or p-channel types based on the doping characteristics of their substrate and the source or drain regions.
In an n-MOSFET, the structure includes n-type source and drain...
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Biasing of FET01:22

Biasing of FET

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Biasing a Junction Field Effect Transistor (JFET) is crucial for setting operational parameters and ensuring efficient functioning in electronic circuits. JFETs are characterized by using a single carrier type in N-channel or P-channel configurations, where the channel is surrounded by PN junctions. These junctions are central to the device's ability to control current flow.
In an N-channel JFET, the structure consists of N-type material forming the channel on a P-type substrate, with the...
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MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

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Depletion-mode MOSFETs represent a unique subset of MOSFET technology, functioning fundamentally differently from their enhancement-mode counterparts. Unlike enhancement MOSFETs, which require a positive gate-source voltage (Vgs) to turn on, depletion-mode MOSFETs are inherently conductive and "normally on" devices.
The primary characteristic of depletion-mode MOSFETs is their ability to conduct current between the drain and source terminals without gate bias. This inherent conductivity...
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Updated: Dec 7, 2025

Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection

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Recent developments in graphene based field effect transistors.

B Vamsi Krsihna1, S Ravi2, M Durga Prakash1,3

  • 1Department of Electronics and Communication Engineering, Koneru Lakshmaiah Education Foundation, Guntur 522502, Andhra Pradesh, India.

Materials Today. Proceedings
|September 28, 2020
PubMed
Summary
This summary is machine-generated.

This survey explores Graphene Field Effect Transistors (G-FETs) as a silicon alternative for advanced electronics. G-FETs offer superior performance for high-speed and sensor applications, driving future integrated circuit development.

Keywords:
Bio-sensorsFabricationGFETGraphene based FETHigh speed analog circuitsModellingRF circuits

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Area of Science:

  • Materials Science
  • Electrical Engineering
  • Nanotechnology

Background:

  • Silicon's limitations in scaling transistor dimensions for Moore's Law compliance.
  • Need for alternative materials with superior electronic properties.
  • Emergence of graphene as a promising semiconductor material.

Purpose of the Study:

  • To provide a comprehensive survey of recent Graphene Field Effect Transistor (G-FET) developments.
  • To cover fabrication, modeling, simulation tools, and applications of G-FETs.
  • To highlight future research directions in G-FET technology.

Main Methods:

  • Literature review of recent advancements in G-FET research.
  • Analysis of fabrication techniques for G-FETs.
  • Examination of modeling and simulation tools for G-FETs.
  • Survey of G-FET applications, particularly in sensors.

Main Results:

  • Graphene exhibits superior carrier mobility and trans-conductance compared to silicon.
  • G-FETs are suitable for high-speed analog VLSI, RF, and bio-sensor circuits.
  • Significant progress in G-FET fabrication and simulation methodologies.

Conclusions:

  • G-FETs represent a viable and high-performance alternative to silicon-based transistors.
  • Graphene's unique properties position G-FETs for next-generation electronic devices and sensors.
  • Continued research in fabrication and application will further unlock G-FET potential.