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Which one of the following statements is correct
- a)linearity is worse than that of a phase discriminator
- b)stabilization is provided against signal strength variations
- c)the output is twice of that obtainable from a similar phase discriminator
- d)the circuit is same as that in a discriminator, except that the diode connections are reversedIn a ratio detector
Correct answer is option 'A'. Can you explain this answer?
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Which one of the following statements is correcta)linearity is worse t...
Linearity is worse than that of a phase discriminator
The correct answer is option A, which states that linearity is worse than that of a phase discriminator.
Explanation:
- A ratio detector is a type of FM demodulator that provides improved linearity compared to a phase discriminator.
- In a phase discriminator, the output voltage is proportional to the phase difference between the input signal and the reference signal. This means that the output voltage is directly related to the frequency deviation of the FM signal.
- On the other hand, a ratio detector uses a diode bridge configuration to compare the instantaneous amplitudes of the input signal and the reference signal. The output voltage is proportional to the ratio of the amplitudes.
- The advantage of a ratio detector is that it is less sensitive to frequency variations and noise. It provides better linearity for small frequency deviations.
- However, the linearity of a ratio detector is worse than that of a phase discriminator for larger frequency deviations. As the frequency deviation increases, the output voltage of the ratio detector becomes more nonlinear.
- This nonlinearity can introduce distortion in the demodulated signal, especially for high-frequency FM signals with large frequency deviations.
- In contrast, a phase discriminator maintains better linearity across a wider range of frequency deviations.
- Therefore, in terms of linearity, a phase discriminator is generally considered to be better than a ratio detector.
In summary, the correct statement is that linearity is worse in a ratio detector compared to a phase discriminator.
The correct answer is option A, which states that linearity is worse than that of a phase discriminator.
Explanation:
- A ratio detector is a type of FM demodulator that provides improved linearity compared to a phase discriminator.
- In a phase discriminator, the output voltage is proportional to the phase difference between the input signal and the reference signal. This means that the output voltage is directly related to the frequency deviation of the FM signal.
- On the other hand, a ratio detector uses a diode bridge configuration to compare the instantaneous amplitudes of the input signal and the reference signal. The output voltage is proportional to the ratio of the amplitudes.
- The advantage of a ratio detector is that it is less sensitive to frequency variations and noise. It provides better linearity for small frequency deviations.
- However, the linearity of a ratio detector is worse than that of a phase discriminator for larger frequency deviations. As the frequency deviation increases, the output voltage of the ratio detector becomes more nonlinear.
- This nonlinearity can introduce distortion in the demodulated signal, especially for high-frequency FM signals with large frequency deviations.
- In contrast, a phase discriminator maintains better linearity across a wider range of frequency deviations.
- Therefore, in terms of linearity, a phase discriminator is generally considered to be better than a ratio detector.
In summary, the correct statement is that linearity is worse in a ratio detector compared to a phase discriminator.
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Which one of the following statements is correcta)linearity is worse than that of a phase discriminatorb)stabilization is provided against signal strength variationsc)the output is twice of that obtainable from a similar phase discriminatord)the circuit is same as that in a discriminator, except that the diode connections are reversedIn a ratio detectorCorrect answer is option 'A'. Can you explain this answer?
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