Analog electronics circuits miscellaneous


Analog electronics circuits miscellaneous

Analog Electronic Circuits

  1. The frequency of oscillation for a RC phase shift network is given by:









  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    NA


  1. For linear oscillations, in which the output is sinusoidal with little distortion, the loop gain should be:









  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    NA



  1. In RC oscillators, positive feedback is achieved by shifting the output signal through:









  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: C

    NA


  1. RC oscillator can be used up to:









  1. View Hint View Answer Discuss in Forum

    NA

    Correct Option: D

    NA



  1. If 1.5% of the output of an amplifier is feedback negatively to the input, the minimum gain required of the amplifier for oscillations to occur, in the case of phase shift oscillator:









  1. View Hint View Answer Discuss in Forum

    The minimum gain required in the phase shift oscillator is 44.5
    If feedback with feedback factor, β = 1.50% = 0.015 is occurred it reduces the gain by factor (1 + Aβ). So in order to make the oscillator
    New gain should be
    A′ = 44.5 (1 + Aβ)
    = 44.5 (1 + 44.5 × 0.015)
    = 74.43
    = 75
    Hence alternative (D) is the correct choice.

    Correct Option: D

    The minimum gain required in the phase shift oscillator is 44.5
    If feedback with feedback factor, β = 1.50% = 0.015 is occurred it reduces the gain by factor (1 + Aβ). So in order to make the oscillator
    New gain should be
    A′ = 44.5 (1 + Aβ)
    = 44.5 (1 + 44.5 × 0.015)
    = 74.43
    = 75
    Hence alternative (D) is the correct choice.