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Which one of the following statements is not correct related to oscillators?
  1. The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero.
  2. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of non-linearity.
  3. The condition of unity loop gain Aβ = 1 is called the Barkhausen criterion.
  4. Oscillations will be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.
  • a)
    Only (3)
  • b)
    Only (4)
  • c)
    Both (1) and (4)
  • d)
    Both (2) and (3)
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which one of the following statements is not correct related to oscill...
An oscillator is a circuit which acts as a generator, generating the output signal which oscillates with constant amplitude and frequency. An oscillator is an amplifier which uses a positive feedback without any external input signal.
The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of nonlinearity. The condition of unity loop gain Aβ = 1 is called the Barkhausen criterion.
Where, A is gain of amplifier and β is feedback network.
Oscillations will not be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.
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Community Answer
Which one of the following statements is not correct related to oscill...
The condition of unity loop gain is not correct. The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain magnitude is equal to 1, not the phase shift.
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Which one of the following statements is not correct related to oscillators? The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of non-linearity. The condition of unity loop gainAβ = 1is called the Barkhausen criterion. Oscillations will be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.a)Only (3)b)Only (4)c)Both (1) and (4)d)Both (2) and (3)Correct answer is option 'B'. Can you explain this answer?
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Which one of the following statements is not correct related to oscillators? The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of non-linearity. The condition of unity loop gainAβ = 1is called the Barkhausen criterion. Oscillations will be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.a)Only (3)b)Only (4)c)Both (1) and (4)d)Both (2) and (3)Correct answer is option 'B'. Can you explain this answer? for RRB NTPC/ASM/CA/TA 2024 is part of RRB NTPC/ASM/CA/TA preparation. The Question and answers have been prepared according to the RRB NTPC/ASM/CA/TA exam syllabus. Information about Which one of the following statements is not correct related to oscillators? The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of non-linearity. The condition of unity loop gainAβ = 1is called the Barkhausen criterion. Oscillations will be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.a)Only (3)b)Only (4)c)Both (1) and (4)d)Both (2) and (3)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for RRB NTPC/ASM/CA/TA 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which one of the following statements is not correct related to oscillators? The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero. In every practical oscillator, the loop gain is slightly larger than unity and the amplitude of the oscillations is limited by the onset of non-linearity. The condition of unity loop gainAβ = 1is called the Barkhausen criterion. Oscillations will be sustained if, at the oscillator frequency, the magnitude of the product of the transfer gain of the amplifier and the magnitude of the feedback factor of the feedback network are less than unity.a)Only (3)b)Only (4)c)Both (1) and (4)d)Both (2) and (3)Correct answer is option 'B'. Can you explain this answer?.
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