ALERT

[FREE DEMO] Deploy Your Enterprise Cloud in Minutes

Junction Field Effect Transistor (JFET)

Definition - What does Junction Field Effect Transistor (JFET) mean?

A junction field effect transistor (JFET) is the the simplest type of three-terminal semiconductor transistor. JFETs are widely employed as electronically controlled switches, voltage-controlled resistors and amplifiers. The semiconductor material in a JFET is positively and negatively doped and arranged to form a channel for effective functioning of the device.

Techopedia explains Junction Field Effect Transistor (JFET)

In a JFET, the semiconductor doped with donor impurities forms an n-type channel, whereas a semiconductor doped with acceptor impurities forms a p-type region. An electrical connection at the end of the channel on a JFET is either a drain terminal or source terminal, and the middle terminal is known as a gate. These terminals are actually p-n junctions with the main channel. The main difference between any bipolar junction transistor (BJT) and a JFET is how they are controlled — a BJT is controlled by current, while a JFET is controlled by voltage.

Techopedia Deals

Connect with us

Techopedia on Linkedin
Techopedia on Linkedin
Tweat cdn.techopedia.com
"Techopedia" on Twitter


'@Techopedia'
Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Resources
The 4th Era of IT Infrastructure: Superconverged Systems
The 4th Era of IT Infrastructure: Superconverged Systems:
Learn the benefits and limitations of the 3 generations of IT infrastructure – siloed, converged and hyperconverged – and discover how the 4th...
Approaches and Benefits of Network Virtualization
Approaches and Benefits of Network Virtualization:
Businesses today aspire to achieve a software-defined datacenter (SDDC) to enhance business agility and reduce operational complexity. However, the...
Free E-Book: Public Cloud Guide
Free E-Book: Public Cloud Guide:
This white paper is for leaders of Operations, Engineering, or Infrastructure teams who are creating or executing an IT roadmap.
Free Tool: Virtual Health Monitor
Free Tool: Virtual Health Monitor:
Virtual Health Monitor is a free virtualization monitoring and reporting tool for VMware, Hyper-V, RHEV, and XenServer environments.
Free 30 Day Trial – Turbonomic
Free 30 Day Trial – Turbonomic:
Turbonomic delivers an autonomic platform where virtual and cloud environments self-manage in real-time to assure application performance.