How does a CMOS inverter work as an amplifier?

Discussion in 'The Projects Forum' started by Asmita Nayak, May 17, 2015.

  1. Asmita Nayak

    Thread Starter New Member

    May 17, 2015
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    I know that it works as an amplifier in the transition or linear region. But how? What is the exact working operation? Please also explain in terms of i/o voltage/current?
     
  2. Alec_t

    AAC Fanatic!

    Sep 17, 2013
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    Welcome to AAC!
    Have a read of this.
     
  3. DickCappels

    Moderator

    Aug 21, 2008
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    Thread reopened (bump)
     
  4. alfacliff

    Well-Known Member

    Dec 13, 2013
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    due to the internal design of cmos "digital" chips, they will work as linear if given a bias on the input.
     
  5. AnalogKid

    Distinguished Member

    Aug 1, 2013
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    Without getting into Schmitt Triggers, all normal logic gates are very high gain linear amplifiers inside. Just like with an opamp, an inverting gate can act as an inverting linear amplifier with the appropriate negative feedback to limit the gain to something below its open-loop value. This works better with CMOS than TTL devices, and better with unbuffered CMOS than buffered (B series) CMOS, but the internal schematic tells the tale. Like everything in the digital universe, it's all analog inside.

    ak
     
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