Nikša No additional components are required for basic switching. For high speed one would likely need a higher drive current (because of the gate capacitance) than can be provided by a signal generator and physically adjacent rather than at the end of a cable. Just ensure that the generator swing goes close to zero to ensure 'off' and for fullest conduction the drive voltage should approach the maximum allowed on the spec sheet. But do you actually need a BIMOSFET? Plain MOSFETs are much more readily available and cheaper. Old PC motherboards are a good source. If you do need the enhanced high voltage capacity of a BIMOSFET it might not be particularly wise to embark upon such experiments until you have gained more experience because it can be dangerous and expensive. Have fun though. BTW, BIMOSFETs are just IGBTs, the additional name is just marketing. And IGBT is a silly name anyway 'GIT' (gate insulated transistor) would have been far better, that's what we call them in the lab.

Traslate to pt-BR, please..

AddOhms a

One question, we are working with a 2n7000 n channel transistor and in the drain caracteristics grafic states that the id max its reach at Vgs=10v with 1.5ma aprox. why its this, isnt it supose to be at Vgs=0v idss?

I look at the Vgs and even the Vbe on BJT as what will kill it, and have put an LED on that location between base to emitter or gate to source to prevent the damage, as even a BJT can have too high of a voltage when there is not enough load on the collector when in darlington configuration. Best designs are ones that take into account what might happen to cause failure, then if something unusual happens it does not die on you.

I agree, I just knew they were voltage controlled -_- This guy taught me so much in 7 minutes, I really liked the datasheet part (at school they just throw questions and say to use the datasheet, but not explain what to look for or determine if a heat sink would be required)

........I remember those type of textbooks.. It's important to have a play with the components to get familiarized. I'm surprised how many people don't know a simple set up with a p and n channel jfet that results in a tunnel diode effect but when I first came across this simple circuit I just had to try it out and it produces excellent sine waves according to my hearing perception.

@dylans voice Which is why some companies are moving away from schools. Had an interview taking 3 hours of an online quiz, had questions from basic programming to PCB design. They had open internet and said go for it. We will contact you if you are selected after it was completed. Overall, the best interview I could say that I had, I also believe they had 7-8 other candidates taking the test, we were all spaced like 15 minutes apart to have the 1 on 1 personal questions.

I failed Electronics as a subject and hated it for its Transfer Functions, but I could build any circuit I chose to. Damn lecturer was as boring as mud

@dylans voice yup cheaper too 💀

I'm making t-shirts that say "I'm trying to buy a MOSFET, not design one." That expresses my - an many people's - frustrations perfectly, and why I also very much appreciate this video even 8 years later!

Sorry I don't understand?

Audio, power supplies, motor controllers, and really anything that requires significant power. BJT's are generally lower power transistors. MOSFET are used when you need to power something. If you open up a power supply, you may see these guys regulating the output and/or gating the input. Often times, they replace the role of a relay. Relays are great, but they have their short comings when compared to transistors. This an area where MOSFET's shine. An example can be found in Arduinos. These are little micro-controller boards. They have an extremely limited power budget to work with. The Arduino can't even kick out enough power to close a relay. The Arduino has the brains, but not the brawn to make a lot happen. If you wanted to make your Christmas light flash on and off in time with music, you'd have a situation where you'd want relays to close reliably in time. These relays may need to be beefy enough to take several amps of current and require significant power to close. The MOSFET might be your interface between the Arduino and the relay. Another example would be in car audio amplifiers. You might need several amps at 30+v alternating at 30+hz in a sine wave. MOSFETs are used to make this happen. Consequently, they put off significant heat which creates the requirement of the large heat sink chassis. There are countless other reasons to use a MOSFET, but this is already a book.

School is the slow way to learn :/

youre absolutely right, the truly deal is out there, were's the real troubles are,

I took eet in college many years ago. This 7.45 minute video is worth 2 hours of class time as far as I am concerned. The classes I took were not bad, it is just that there was an extreme reluctance to get into anything practical.

I agree!!! Sometimes I wish there was a pause button to push to slow down professors, or a please make this clear button - no such luck!!

"Most accurate..." except for the part where I draw a depletion mode symbol while explicitly stating it is an enhancement mode symbol. ;)

Just don't forget that the ambient temperature won't always be 25°C. If the installation is some cupboard next to a south-facing window, you can bet that it'll get up to 45 in there and let the smoke out.

dito. superb video

Same here, I agree.

What did you do instead?

Same here , I choose IT instead.

@@gusmotorsports i found the middleground in the domain of embedded design

At 0:28 The other says "I'll get H2O" too ... the second guy might die, but at least he'll be disinfected by H peroxide. ;)

Thanks.

Sveinn Grétarsson why are you trying to determine that?

It's fine, I finally found a decent article covering this. The reason is that I am currently working on a hydraulic solenoid valve driver circuit which used a 200V mosfet as a switch, and used a mosfet driver (LM5112MY) as gate driver. The applicaiton note of the driver stated that an external gate resistance should be used, but never mentioned any guidelines as to how it should be determined. It is ofcourse just an RC circuit, of which you determine the resistance to get a predefined time constant. Silly me. :)

same!

Me too.

Hello.

Hey!

Actually, it's 11, those that understand binary, those that don't and those that know tristate

YESSSSSSSSSSSSSSSSSSSSSSSS

Excellent point. It's something I already planned to cover in the future. However, it is exactly why I at at least included in the schematic, to hopefully prompt the question "why is it there?"

This is not a hidden secret of electronics. However, I have learnt that the hard way after hours of google search and experimenting. And sometimes such small details can be really demotivating for an hobbyist or a beginner... It would be good, if you can cover this in the next mosfet video.

Wow, thanks so much! Was wondering what I was doing wrong. Any idea what type of resistor is needed to ground (I put in a 2k which seemed to work fine). Also, I assume there should also be a small resistor from the positive voltage to the gate as drawn.

I had to read that 3 times to get it. is that bad ?

kind of!!

voltixD thanks!!

If he didn't, at least he got a nice diarrhea.

voltixD . Hahahahaha

+Michael Hawthorne Aahh the wonders of Google.... H2O2.... Hydrogen Peroxide.

+Michael Hawthorne Yeah, I drew it wrong.

H2O2 his hydrogen peroxide the chemical which caused the disaster resulting in the sinking of submarine Kursk

maybe consider putting a note in the description?

I doubt it! Western Media Story. My guess is that those rumors about an accident (collision) between Trident US Navy submarine and Kursk are more true than not. These collisions happen all the time, they are just not reported about. Often in Black Sea. Often between ships, less likely submarines. I am fine with these collisions being kept in semi-secret mode. There is one story for the public, another for inner circle. Sadly, this makes sense as most people are no longer capable of critical thinking. "Democracy is based upon the conviction that there are extraordinary possibilities in ordinary people." - Harry Emerson Fosdick

LOL

._.

I feel a rudely impulse to ask what you were building

Thanks, but you put more thought into it than I did. I just wanted to point out the videos are scripted. People are often ask: "how do I make videos like yours?!" I always say: "start by writing a script."