Two stage amplifier

Discussion in 'Homework Help' started by kadomori, Feb 10, 2011.

  1. kadomori

    Thread Starter New Member

    Jan 29, 2011
    6
    0
    When do we need cascaded amplifier? Please give me some example applications where the need of high input impedance is of prime importance.
     
  2. Audioguru

    New Member

    Dec 20, 2007
    9,411
    896
    A guitar pickup works best when its preamp has an input impedance of at least 1M ohms.
    A ph sensor needs a preamp with an extremely high input impedance.

    I would use an opamp that has FET inputs.
     
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