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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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Design Example: Capacitance Multiplier Circuit01:20

Design Example: Capacitance Multiplier Circuit

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In integrated circuit technology, a capacitance multiplier is often utilized to produce a larger capacitance value when a small physical capacitance falls short. This is achieved by a circuit that multiplies capacitance values by a factor of up to 1000, such that a 10-pF capacitor can replicate the performance of a 100-nF capacitor.
The circuit illustrated in Figure 1 below incorporates two op-amps, with the first operating as a voltage follower and the second acting as an inverting amplifier.
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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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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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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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Development and Functionalization of Electrolyte-Gated Graphene Field-Effect Transistor for Biomarker Detection
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Reconfigurable frequency multipliers based on graphene field-effect transistors.

A Toral-Lopez1, E G Marin2, F Pasadas2

  • 1Dpto. Electrónica y Tecnología de Computadores, Facultad de Ciencias, Universidad de Granada, Granada, Spain. atoral@ugr.es.

Discover Nano
|October 5, 2023
PubMed
Summary
This summary is machine-generated.

This study introduces a reconfigurable graphene device for high-frequency electronics. The split-gate transistor acts as a tunable frequency multiplier, switching between doubler, tripler, and quadrupler modes.

Keywords:
Field-effect transistorFrequency multiplierGrapheneHigh frequencyRadio frequencyReconfigurableSplit gate

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Area of Science:

  • Electronics
  • Materials Science
  • Semiconductor Devices

Background:

  • Device-level reconfigurability enhances circuit performance beyond integration limits.
  • Ambipolarity in 2D materials is crucial for reconfigurable electronics.
  • Graphene offers a promising platform for high-frequency reconfigurable applications.

Purpose of the Study:

  • To showcase graphene as an optimal material for high-frequency reconfigurable electronics.
  • To propose and analyze a split-gate graphene field-effect transistor (FET) as a tunable frequency multiplier.

Main Methods:

  • Utilized a physically based numerical simulator, validated with experimental data.
  • Proposed and analyzed a split-gate graphene FET architecture.
  • Evaluated device performance across different operation modes (doubler, tripler, quadrupler).

Main Results:

  • Demonstrated the capability of the proposed graphene FET to function as a dynamically tunable frequency multiplier.
  • Showcased the device's ability to switch between frequency multiplication modes.
  • Analyzed the impact of material and device parameters on performance.

Conclusions:

  • Graphene is an optimal material for implementing high-frequency reconfigurable electronics.
  • The split-gate graphene FET architecture enables tunable frequency multiplication.
  • Device and material parameter tuning allows for optimized reconfigurable multiplier performance.