Physics · Oscillators
Which of the following statements is NOT correct regarding sinusoidal feedback oscillators?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Sustained oscillations will occur if the magnitude of the product of the amplifier gain and the feedback factor (|Aβ|) is strictly less than unity.✓
- 2The condition of unity loop gain Aβ = 1 is called the Barkhausen criterion.
- 3In practical oscillators, the loop gain is initially slightly larger than unity, and amplitude is limited by non-linearity.
- 4The frequency of a sinusoidal oscillator is determined by the condition that the loop-gain phase shift is zero (or integral multiples of 360°).
Correct answer
Sustained oscillations will occur if the magnitude of the product of the amplifier gain and the feedback factor (|Aβ|) is strictly less than unity.
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