How FETs Function -- The Learning Circuit 31

Learn basic electronics, explore STEM subjects, get what you need to know to get started on electronics projects, and more.

Back to element14 Presents homepage

The Learning Circuit

sudo Sergeant

The Ben Heck Show

In this episode, Karen talks about the two common types of field-effect transistors, MOSFETs and JFETs. Find out the differences between them, and what it means for them to work in depletion and enhancement modes.

Top Comments

zlippy over 6 years ago +3

This video was insanely well made. I have been struggling to wrap my head around even the basics of BJTs, and FETs for many months and this is by far the clearest explaination, I have yet seen, of a very…
makerkaren over 6 years ago in reply to warpath78 +1

Yeah, transistors are still a bit of magic to me. After I made the transistor episode, I found a graphic that better showed the inner makeup that really helped transistors make more sense to me. The p…
jc2048 over 6 years ago in reply to makerkaren +1

The diagram below shows how a planar transistor (like a 2N2222 or 2N3904) is fabricated This is from a book by Robert Pease published in 1991. Note that it's not to scale - the substrate will be very much…

Parents

colporteur over 6 years ago

Is a mosfet using trench technology just another name for one of the mosfets described in the video?
Sean
- Cancel
- Vote Up +1 Vote Down
- Sign in to reply
- More
- Cancel

Comment

colporteur over 6 years ago

Is a mosfet using trench technology just another name for one of the mosfets described in the video?
Sean
- Cancel
- Vote Up +1 Vote Down
- Sign in to reply
- More
- Cancel

Children

jc2048 over 6 years ago in reply to colporteur

https://www.onsemi.com/pub/Collateral/AN-9010.pdf.pdf

If you look at Figure 4 it shows the different structures for power MOSFETs. The V and U ones have the gate as a trench that has been etched into the semiconductor.
- Cancel
- Vote Up 0 Vote Down
- Sign in to reply
- More
- Cancel