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

MOSFET: Enhancement Mode01:22

MOSFET: Enhancement Mode

717
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...
717
MOSFET Amplifiers01:17

MOSFET Amplifiers

426
The MOSFET, when operating in its active region, functions as a voltage-controlled current source. In this region, the gate-to-source voltage controls the drain current. This principle underlies the operation of the transconductance MOSFET amplifier. The output current is directed through a load resistor to convert this amplifier into a voltage amplifier. The output voltage is then obtained by subtracting the voltage drop across the load resistance from the supply voltage. This process results...
426
Small-Signal Analysis of MOSFET Amplifiers01:23

Small-Signal Analysis of MOSFET Amplifiers

1.0K
In small-signal analysis, a MOSFET transistor amplifier acts as a linear amplifier when operating in its saturation region. The gate-to-source voltage (VGS) of the MOSFET is the sum of the DC biasing voltage and the small time-varying input signal. This combination sets up the operating point and modulates the drain current (ID) that flows from the drain to the source. When a small AC signal is superimposed on the DC bias voltage at the gate, the instantaneous drain current comprises three...
1.0K
MOSFET: Depletion Mode01:20

MOSFET: Depletion Mode

762
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...
762
Biasing of FET01:22

Biasing of FET

626
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...
626
MOSFET01:16

MOSFET

1.1K
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...
1.1K

You might also read

Related Articles

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

Sort by
Same author

Ultrathin Multi-Doped Molybdenum Oxide Nanodots as a Tunable Selective Biocatalyst.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2025
Same author

An Improved P-Type Doped Barrier Surface AlGaN/GaN High Electron Mobility Transistor with High Power-Added Efficiency.

Micromachines·2021
Same author

A Novel 4H-SiC MESFET with a Heavily Doped Region, a Lightly Doped Region and an Insulated Region.

Micromachines·2021
Same author

An Improved 4H-SiC MESFET with a Partially Low Doped Channel.

Micromachines·2019
Same author

Improved MRD 4H-SiC MESFET with High Power Added Efficiency.

Micromachines·2019
Same author

Novel High-Energy-Efficiency AlGaN/GaN HEMT with High Gate and Multi-Recessed Buffer.

Micromachines·2019

Related Experiment Video

Updated: Dec 31, 2025

Developing High Performance GaP/Si Heterojunction Solar Cells
10:31

Developing High Performance GaP/Si Heterojunction Solar Cells

Published on: November 16, 2018

7.9K

Improved DRUS 4H-SiC MESFET with High Power Added Efficiency.

Hujun Jia1, Yuan Liang1, Tao Li1

  • 1School of Microelectronics, Xidian University, Xi'an 710071, China.

Micromachines
|January 2, 2020
PubMed
Summary

A novel 4H-SiC MESFET with layered doping and undoped space regions (LDUS-MESFET) significantly boosts power added efficiency by 85.8% and saturation current by 27.4%. This design improves DC and AC characteristics for better performance.

Keywords:
4H-SiC MESFETpower added efficiency (PAE)simulation

More Related Videos

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

11.9K
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

13.0K

Related Experiment Videos

Last Updated: Dec 31, 2025

Developing High Performance GaP/Si Heterojunction Solar Cells
10:31

Developing High Performance GaP/Si Heterojunction Solar Cells

Published on: November 16, 2018

7.9K
20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier
10:17

20 mJ, 1 ps Yb:YAG Thin-disk Regenerative Amplifier

Published on: July 12, 2017

11.9K
Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light
11:26

Integrating a Triplet-triplet Annihilation Up-conversion System to Enhance Dye-sensitized Solar Cell Response to Sub-bandgap Light

Published on: September 12, 2014

13.0K

Area of Science:

  • Semiconductor device physics
  • Materials science
  • Electrical engineering

Background:

  • 4H-Silicon Carbide (SiC) Metal Semiconductor Field Effect Transistors (MESFETs) are crucial for high-power applications.
  • Optimizing MESFET structures is key to enhancing efficiency and performance.
  • Existing designs like double-recessed structures have limitations.

Purpose of the Study:

  • To propose and simulate a new 4H-SiC MESFET structure: the layered doping and undoped space regions MESFET (LDUS-MESFET).
  • To evaluate the performance improvements of the LDUS-MESFET compared to conventional designs.
  • To analyze the trade-offs between DC and AC characteristics for the proposed device.

Main Methods:

  • Device simulation using Advanced Design System (ADS) and ISE-TCAD software.
  • Introduction of layered doping under the lower gate of the channel.
  • Optimization of the undoped space region thickness in the 4H-SiC MESFET structure.

Main Results:

  • The LDUS-MESFET demonstrated an 85.8% increase in power added efficiency (PAE) compared to the DRUS-MESFET.
  • Saturation current increased by 27.4% in the LDUS-MESFET.
  • The device exhibited a smaller gate-source capacitance and a large transconductance, with a minor acceptable decrease in breakdown voltage.

Conclusions:

  • The LDUS-MESFET design offers a superior balance between DC and AC characteristics.
  • The proposed structure significantly enhances power added efficiency (PAE) in 4H-SiC MESFETs.
  • LDUS-MESFET represents a promising advancement for high-performance semiconductor devices.