Analog circuits miscellaneous

Analog circuits miscellaneous

Easy Questions
Moderate Questions

Analog Circuits

Analog circuits miscellaneous
  1. OPAMP used as a tuned amplifier has the tuned circuit connected








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    NA

    Correct Option: C

    NA

  1. In the OP-AMP circuit shown in the given figurs V0 is given by









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    V0
    		 =
    3R
    		 = 3
    VsR

    ⇒ V0 = 3Vs

    Correct Option: C

    V0
    		 =
    3R
    		 = 3
    VsR

    ⇒ V0 = 3Vs

  1. If differential amplifier has a differential gain of 20,000. CMRR = 80 dB, then common mode gain is








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    20 log
    Ad
    		 = 80
    Ac

    ⇒
    Ad
    		 = 104
    Ac

    ⇒
    Ad
    		 = Ac
    104

    ⇒ Ac =
    2 × 104
    		 = 2
    104

    Correct Option: A

    20 log
    Ad
    		 = 80
    Ac

    ⇒
    Ad
    		 = 104
    Ac

    ⇒
    Ad
    		 = Ac
    104

    ⇒ Ac =
    2 × 104
    		 = 2
    104

  1. Feedback factor for the circuit shown in the given figure is









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    Feed back factor =
    10
    		 =
    1
    1000100

    Correct Option: D

    Feed back factor =
    10
    		 =
    1
    1000100

  1. Given figure represents ac equivalent circuit of a parallel voltage feedback amplifier stage. If hfe, hfc are h parameters in common emitter and common collector operations respectively at Q , then current gain ( Io / It ) of this stage is








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    NA

    Correct Option: C

    NA