Common-Base amplifier

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

  1. Pavlo138

    Thread Starter Member

    Feb 26, 2009
    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
  3. zhgart

    New Member

    Dec 28, 2009
    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
    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.