VACUUM TUBE

Discussion in 'Electronics Resources' started by tam72f1, Dec 2, 2014.

  1. tam72f1

    Thread Starter New Member

    Aug 19, 2014
    15
    1
    Hi all!
    I'm trying to learn about vacuum tube but i don't have many document and i have some problem about theory!
    1.Transistor has Ic = b*Ib, can anyone give me an equaiton of vacuum tube: Ip =????
    I hope you can understand what i say!
    Thank all
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
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    One thing to Google is (tube) Transconductance amplifier.
    Max.
     
  3. Papabravo

    Expert

    Feb 24, 2006
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  4. alfacliff

    Well-Known Member

    Dec 13, 2013
    2,449
    428
    also search for "edison effect". same as thermionic emission.
     
  5. #12

    Expert

    Nov 30, 2010
    16,261
    6,768
    In my opinion, the most similar transistor is the n channel j-fet. It acts like a tube when in proper operation and even allows electrons to flow out of the gate terminal if the input signal goes too far positive.
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,515
    2,369
    Aye, FET's also generally represent a Transconductance amplifier.
    Max.
     
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