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| Q. |
Which of the following FM demodulator is sometimes known as pulse averaging discriminator? |
| A. | slope detection |
| B. | zero crossing detection |
| C. | quadrature detection |
| D. | phase locked discriminator |
| Answer» B. zero crossing detection | |
| Explanation: zero crossing detector is sometimes known as pulse averaging discriminator. the rationale behind this technique is to use the output of the zero crossing detector to generate a pulse train with an average value that is proportional to frequency of the input signal. | |
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