Analog Communication - Electronic Engineering (MCQ) questions & answers for Q. 13724
Q. Function of frequency mixer in super heterodyne receiver is- Published on 14 Oct 15a. Amplification
b. Filtering
c. Multiplication of incoming signal and the locally generated carrier
d. None of the above
ANSWER: Multiplication of incoming signal and the locally generated carrier
The function of a frequency mixer in a super heterodyne receiver is that it mixes or multiplies the incoming modulated carrier with the locally generated carrier. It then produces a number of frequencies. The produced frequencies are either the sum or the differences of the frequencies of the received signals. The output of the mixer is used to detect the modulating or information signal from the received modulated carrier.
