Question

Which of the following statement is true about a radio detector?

(a) the linearity is worse than in phase discriminator

(b) there is stabilization against signal strength variations

(c) the final output is twice of that obtainable from a similar phase discriminator

(d) the circuit is same as in a discriminator, except that the diodes are reversed.

I had been asked this question in an online interview.

My doubt is from Noise for AM Wave topic in division Noise of Analog Communications

Answer 1

Right answer is (a) the linearity is worse than in phase discriminator

The explanation is: Detector, also known as a demodulator, in a radio receiver extracts the original information that is contained in a modulated radio wave. The linearity of a radio detector is worse than in phase discriminator. However, the radio detector does not get affected by amplitude variations and minimizes the limiting required.