Common-Base amplifier

Discussion in 'Homework Help' started by Pavlo138, Dec 28, 2009.

  1. Pavlo138

    Thread Starter Member

    Feb 26, 2009
    28
    0
    Hello all,

    I'm still studying up fpr my CETa exam and just have a quick and curious question about Common-Base amplfiers; why are they preferred in RF amplification over other configs? Is it because they cause the least amount of distortion? I know that the current gain for the most part is unity.....does that have anything to do with it? Thanks!
     
  2. JoeJester

    AAC Fanatic!

    Apr 26, 2005
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  3. zhgart

    New Member

    Dec 28, 2009
    19
    1
    yes, it can be more wide band, as it reduce miller effect at Ccb.
    generally we add a cascade common remitter circuit to rise it gain.
     
  4. Pavlo138

    Thread Starter Member

    Feb 26, 2009
    28
    0
    Thank you all, that makes perfect sense now; of course an RF stage of a receiver needs to be able to amplify all of the bandwidth that is is designed to receive. It makes a lot of sense then to use a common-base for the RF stage. And thanks for the resource JoeJester.
     
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