Question

Normally, front-end selectivity is provided by the resonant networks both before and after the RF stage in a superheterodyne receiver. This whole section of the receiver is often referred to as the:

a) IF section
b) RF section
c) Mixer stage
d) Antenna system

Answer 1

The section of a superheterodyne receiver that is responsible for front-end selectivity is referred to as the RF section. It includes a tuner circuit for resonant frequency matching with the carrier wave and helps in signal amplification and conversion.

Step-by-step explanation:

The section of a superheterodyne receiver that provides front-end selectivity by resonant networks before and after the RF stage is often referred to as the RF section. This RF section includes a tuner that allows the receiver to be tuned to the same resonant frequency as the carrier wave, enabling it to pick up the desired signal and reject other frequencies. The incoming electromagnetic waves induce oscillating currents in the antenna, and the receiver circuitry is designed to respond to these variations in amplitude to replicate the original audio signal. This signal is then amplified and converted into an audio and/or video format for consumption.