Analog electronics circuits miscellaneous
- The frequency of oscillation for a RC phase shift network is given by:
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NA
Correct Option: C
NA
- For linear oscillations, in which the output is sinusoidal with little distortion, the loop gain should be:
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NA
Correct Option: D
NA
- In RC oscillators, positive feedback is achieved by shifting the output signal through:
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NA
Correct Option: C
NA
- RC oscillator can be used up to:
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NA
Correct Option: D
NA
- 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:
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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.