#834
Рет қаралды 9,043
3 жыл бұрынEpisode 834
A first look at a transistor operating. Some ideas of saturation and linear region.
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@valloway 3 жыл бұрын
Beginner here: great video, I learned lots!
@billpowell5931 3 жыл бұрын
Definitely helped with my lack of transistor knowledge. Thanks for sharing. Look forward to the follow-ups.
@HitAndMissLab Жыл бұрын
That up & down thing I completely missed and thus never properly understood transistors. Thank you for devoting a whole video to it. At least for me, it is very important.
@mousam_upadhyaya 3 жыл бұрын
Very Impressive Explaination, Specially Visualisation of Linear region 👍
@edgeeffect 3 ай бұрын
That was excellent.... one of the best explanations I've heard. I think it really helps that you start with a "really bad" amplifier too.
@egirland 3 жыл бұрын
For the base circuit I learned to pretend I am just lighting a LED (constant current.. or limiting resistor...) For the collector-emitter (thank to the transistor magics) your video applies. Thank you for your videos!!
@jdmccorful 3 жыл бұрын
Great "realization" of what's seen in the texts. One of the best books I've found on explanation of amplification is "Troubleshooting, Servicing, And Theory of AM, FM, & FM Stereo Receivers" by Green and Bourque. I use it a great deal. A worthwhile addition to have in library. Thanks for the look.
@IMSAIGuy 3 жыл бұрын
I just looked for that book, way too expensive sadly
@robertdixon8238 3 жыл бұрын
A clear demonstration of what the linear region means. Effectively, you've built a simple curve tracer, but much easier to follow what's going on, than a traditional one. Are you going to show the current relationships (Ib vs Ic) as well as the voltage ones? (Vbe vs Vce). Keep up the good work.
@IMSAIGuy 3 жыл бұрын
I have a series on my curve tracer design and build: kzfaq.info/get/bejne/pax4h7KCua_NY2Q.html
@nickcaruso 3 жыл бұрын
Loved this video. Thank you for making it.
@frankowalker4662 3 жыл бұрын
Neat. I have very little knowledge of transistors. Looking forward to the next part.
@RicardoPenders 3 жыл бұрын
I'd like to see you explaining this the exact same way but then for mosfets, I watched so many videos on this topic but nobody explains it as good as you do.
@therfnoob7697 3 жыл бұрын
ISMAI Guy, thanks! Excellent video as usual!
@kennywang6222 6 ай бұрын
Awesome explanation! Thank you.
@Adrian_Finn Жыл бұрын
This was super useful, Thank you.
@rafaelgcpp 3 жыл бұрын
Malvino is a book that at a first glance looks good, but it is mostly confusing and incomplete. One of the best I had was Serra and Smith's Microelectronics. Although more complex, it brings you by the hand from simpler concepts...
@vincei4252 3 жыл бұрын
Yeah, I have Malvino and I know what you mean. I bought mine off eBay about a year ago.
@jamescollier3 2 жыл бұрын
Best example of saturation
@williamogilvie6909 2 ай бұрын
The way you explain this circuit, eg: hand-waving, you could just as easily have a relay instead of a transistor. Have you heard about transistor models? Simplest is a diode and current source.
@MaxPivovarov Жыл бұрын
I wanted to recommend you an excellent book for beginners about the transistors Eugène Aisberg "Le Transistor?. Mais C'est Très Simple!" which I read at the age of six. But it turned out it never went in English. And the best book about the electronics of all time I know is “The Art of Electronics” Paul Horowitz, Winfield Hill.
@IMSAIGuy Жыл бұрын
archive.org/details/iltransistoreeunacosasemplicissima/mode/2up
@nickcaruso 3 жыл бұрын
It’s a sine to square wave converter!
@IMSAIGuy 3 жыл бұрын
a pretty poor square wave 😀
@nickcaruso 3 жыл бұрын
Do you have The Art of Electronics by Horowitz and Hill?
@IMSAIGuy 3 жыл бұрын
kzfaq.info/get/bejne/hah-n5Bn06zdfGQ.html
@nickcaruso 3 жыл бұрын
@@IMSAIGuy i should have known you would like it. i have a friend and former cow orker whose first job after emigrating to usa was to test & verify all the example circuits in first edition AoE.
@IMSAIGuy 3 жыл бұрын
wow, he must have learned so much
@hanskoc3473 3 жыл бұрын
Another great lecture. Thank you. I am curious if you have knowledge about the history of transistor construction. I mean the kind of knowledge you convey in your films, i.e. the technical and business real stories behind important products that we know today. Maybe you knew Mr. Shockley? :)
@IMSAIGuy 3 жыл бұрын
I worked with a fellow that was part of Shockley's lab here in silicon valley. He went on to be the CTO of the LED group of HP. I have stories of LEDs I might tell someday.
@johnjohn-ed9qt 3 жыл бұрын
Key thing with saturation is that saturation current is not determined by the transistor. In the resistively loaded collector case, it is determined by the collector resistance and the supply potential, here 1Kohm and 10V. This tells us ahead of time that the saturation current will be 10mA, minus a little for the saturation voltage. Saturation voltage is current dependent, and is usually specified on the data sheet at a particular current (or at several currents). For example: V_CE is specified at I_C=10mA and I_C=50mA for the 2N3904 (Fairchild data sheet, 2011) as 0.2V and 0.3V, respectively.
@IMSAIGuy 3 жыл бұрын
Yes. But, please, these videos are very basic and I will be avoiding math. It is a high level overview for beginners. My goal of the video was to teach basic concepts. Many people will never need to design circuits or calculate anything. I hope that when they hear the term 'saturation' they know that transistor is on all the way. and when they hear 'linear region' they remember the visual scope trace being a straight line. That's it , That's all. There is a need for this type of teaching because many will tune out as soon as you say V_CE at I_C and do math. Lots of other videos to do that stuff.
@nickcaruso 3 жыл бұрын
Is the point where the yellow and blue line cross significant? Does it indicate the onset of the linear region?
@IMSAIGuy 3 жыл бұрын
no
@nickcaruso 3 жыл бұрын
@@IMSAIGuy dang.
@dryster123 Жыл бұрын
I would have liked to see the transistor circuit before the oscilloscope explanation
@IMSAIGuy Жыл бұрын
the first two minutes show the circuit
@dryster123 Жыл бұрын
@@IMSAIGuy Ah, sorry for the confusion, I meant the actual physical circuit, not the circuit diagram
@IMSAIGuy Жыл бұрын
really? it's only three parts.
@dryster123 Жыл бұрын
@@IMSAIGuy but what was the source of the input?
@IMSAIGuy Жыл бұрын
@@dryster123 those came from a HP 33120a generator
@hflorin07 3 жыл бұрын
I think you should pay a little more attention to the measurements... The input voltage for saturation would probably be somewhere above 700 mV, not above 900 mV, as you read on the marker. If you had given the marker line below (in a correct position), it would probably have been above 700 mV. More attention to what is seen on the screen! (Min. 7:15) kzfaq.info/get/bejne/e9-ioZV6uM6paWQ.html
@IMSAIGuy 3 жыл бұрын
you are right. I had made the measurement first before the video and when I did it the second time for video I didn't update the cursors
@hflorin07 3 жыл бұрын
@@IMSAIGuy I made this correction because this video is dedicated to beginners. Thus, it is good for them to understand more clearly what they see when they look at an oscilloscope screen. You're doing a good job, anyway!
@IMSAIGuy 3 жыл бұрын
@@hflorin07 Thanks. My goal was to teach two things. saturation and linear region. I hope I did that.