[WEBINAR] The New Normal: Dealing with the Reality of an Unsecure World

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
"Techopedia" on Twitter

Sign up for Techopedia's Free Newsletter!

Email Newsletter

Join thousands of others with our weekly newsletter

Free Whitepaper: The Path to Hybrid Cloud
Free Whitepaper: The Path to Hybrid Cloud:
The Path to Hybrid Cloud: Intelligent Bursting To Amazon Web Services & Microsoft Azure
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.