Which of the following FM demodulator is sometimes known as pulse averaging discriminator?

Which of the following FM demodulator is sometimes known as pulse averaging discriminator? Correct Answer Zero crossing detection

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.

Related Questions

One positive pulse with tw = 75 µs is applied to one of the inputs of an exclusive-OR circuit. A second positive pulse with tw = 15 µs is applied to the other input beginning 20 µs after the leading edge of the first pulse. Which statement describes the output’s relation with the inputs?