Consider the FM discriminator shown in Figure 4.38. The envelope detector can be considered ideal with an infinite input impedance. Plot the magnitude of the transfer function E(f) / X_r (f). From this plot, determine a suitable carrier frequency and the discriminator constant K_D, and estimate the allowable peak frequency deviation of the input signal.

Figure 4.38

Transcribed Image Text:

L = 10-3 H C = 10-9 F Envelope e(t) R = 103 Q x,(t) Ур) detector