Cascode Amplifiers

Discussion in 'Feedback and Suggestions' started by Marie111000, Jan 21, 2010.

  1. Marie111000

    Thread Starter Guest

    It should be cascade amplifiers not cascode. In some elements of the discussion it was spelled cascade and in others it was spelled cascode.
     
  2. hgmjr

    Moderator

    Jan 28, 2005
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    Can you tell us what reference to cascode you believe should be changed to cascade?

    hgmjr
     
  3. t_n_k

    AAC Fanatic!

    Mar 6, 2009
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    I think the guest was possibly referring to this paragraph from the Cascode Amplifier section.

    While the C-B (common-base) amplifier is known for wider bandwidth than the C-E (common-emitter) configuration, the low input impedance (10s of Ω) of C-B is a limitation for many applications. The solution is to precede the C-B stage by a low gain C-E stage which has moderately high input impedance (kΩs). See Figure below. The stages are in a cascode configuration, stacked in series, as opposed to cascaded for a standard amplifier chain. See “Capacitor coupled three stage common-emitter amplifier” Capacitor coupled for a cascade example. The cascode amplifier configuration has both wide bandwidth and a moderately high input impedance.

    They appear to be incorrect in their assertion. Looks fine to me.
     
  4. hgmjr

    Moderator

    Jan 28, 2005
    9,030
    214
    I'm hoping that marie111000 will return and let us know which specific statement or section in the ebook she suspects is wrong. Then we can check to out.

    hgmjr
     
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