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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»

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.



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