Transistors Introduction 1. How Semiconductors Work and History Class 26.

Basic Transistor theory and history. How a transistor amplifier works. John Bardeen. William Bradford Shockley Jr, Walter Houser Brattain, Point Contact Transistor, J.C. Bose.
Video Rating: 4 / 5

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25 Responses

  1. Carmel Pule' says:

    Antimony and not anatomy for the doping material.

  2. Newbpwng says:

    wtf how is it you say from Anode to Cathode but show from Cathode to Anode
    ??? 2:20

  3. chocdawg1234 says:

    Like the guy. But who knew Captain Kangaroo knew so much about
    semiconductor physics. 

  4. Steve Kitsch says:

    I was quite surprised to hear anatomy used as a doping material, then I
    realised you meant antimony.

  5. anno250 says:

    No because A TTL transistors depend on voltage change to work .The emitter
    to base . A FET works on resistance variation so its a Current device . TTL
    has a low intut impedence where a FET and Triode valve has a high input
    impedence. A valve may use high voltage but its a current device because
    the input voltage varies the internal resistance .

  6. Rob Sutton says:

    According to Yoda, current flows from negative to positive. According to
    Chuck Norris, current flows from positive to negative. I guess we know who
    won that debate…

  7. anno250 says:

    TTL is a voltage device not current device .A FET is a current device ,so
    is a Valve
    And for those confused about electron flow ,if you test a diode with a
    multimeter the negative lead goes on the anode and the positive goes on the
    cathode . I use the triange in the symbol as an arrow for electron flow .
    Works with LED’s as well

  8. JOHN yoder says:

    Well done! very articulate. I love the history stuff too!

  9. crandallaj says:

    thanks great video, love the not pointing in, and pointing in pneumonic

  10. José Tony Stark Peña says:

    Doesn’t current flow in the opposite way of electrons? I thought current
    flows from the anode towards the cathode, unless it’s a Zener diode.
    Enlighten me.

  11. Vote4Crossover says:

    FaZe flashy?

  12. Shohei Okabe says:
  13. liangQ1 says:

    I don’t get it , why you keep saying transistor is amplifier , its not a
    amplifier , all it dose is using low current controls high current. it
    doesn’t bring up any current or voltage something.

  14. ElijahsLittleGirl says:

    then you wonder if they still have it right

  15. mehdi achouri says:

    ha ha ha, very good constructed comeback. i know that the electrons move
    from negative to positive, and holes move the opposite way. but in reality
    current flows from positive to negative, if you design a circuit, you don’t
    start from the ground and work your way up to the positive and then put the
    required voltage. but you get power supply( known voltage) and start
    constructing the circuit and calculate all values until you finish. you
    have to be realistic as well,

  16. Paul Tuon says:

    I’m 100% with you on that, and every time I watch people trying to explain
    the working of transistors, my head hurts very bad–a sign of my brain not
    taking anything thrown at me. Maybe I’m not smart enough to be learning
    this kind of things. I wish some instructors make an effort to explain it
    more intuitively and realistically of how the current flow from point A to
    point B to point C to point D, etc. I’m on to searching for more videos in
    hope I find such instructors. My head still hurts.

  17. Dan See says:

    Thanks a lot for this video. Been working on electronics since 97. Need to
    take a test for a job, and needed a refresher. While I worked on this stuff
    for years, been awhile since I’ve seen theory. Its all coming back to me
    now.

  18. John Smith says:

    Apparently he is talking about electron current, whereas you are talking
    about hole current. The convention is to use hole current, so it does look
    confusing in the video.

  19. residentgomez says:

    they’re Delicious.

  20. scott22v says:

    I see a lot of comments arguing which way the current flows. In
    conventional theory “early theory” engineers thought current flowed from
    positive to negative,What they were seeing was an optical illusion, the
    propeller effect if you will. the props spinning so fast it looked like is
    was spinning backwards. what u actually see is the space between the props
    blades going backward while the blades were spinning the way they were
    supposed to. Electron flow is from negative to positive.

  21. hmpl55 says:

    Thanks for the videos!

  22. mehdi achouri says:

    we’re not talking about the direction of electrons here, but we’re talking
    about the current, the conventional current. it’s like you’re saying that
    if you’re running on a treadmill, you’re running forward, but the fact is
    the treadmill is moving backwards and you’re only moving (running) to hold
    your position, so if you take the tread mill out of the picture you’ll find
    out that you’re not really moving.

  23. R Vass says:

    until somebody comes along and says they go side way!!!

  24. Joel Evans says:

    I think you mean protons, otherwise that scares me a little

  25. mehdi achouri says:

    the transistor was discovered in europe but they didn’t realise its
    importance because they were working on wireless signals, but in texas they
    did and published it straightaway and got a nobel prize for it i think in
    1946, and was improved in 1951.

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