A superheterodyne receiver consists of blocks in sequence as given in the options. Which of them gives the correct order? 

Explanation:

Superheterodyne Receiver

Definition: A superheterodyne receiver is a type of radio receiver that uses frequency mixing to convert a received signal to a fixed intermediate frequency (IF) for easier processing. This design has been widely adopted due to its superior selectivity, sensitivity, and stability compared to earlier designs.

Working Principle: The superheterodyne receiver works by taking the incoming radio frequency (RF) signal, mixing it with a locally generated oscillator signal, and converting it into an intermediate frequency (IF). The IF signal is then amplified and demodulated to retrieve the original audio or data signal.

Correct Option Analysis:

The correct sequence of blocks in a superheterodyne receiver is:

Option 2: Antenna → RF stage → Mixer (other input from local oscillator) → IF Amplifier → Detector → Audio Amplifier

This option correctly represents the block diagram and operational sequence of a superheterodyne receiver:

• Antenna: The antenna captures the RF signal from the airwaves.
• RF Stage: The RF stage amplifies the received signal and filters out unwanted frequencies to enhance the desired signal.
• Mixer: The mixer combines the amplified RF signal with a signal from the local oscillator to produce the intermediate frequency (IF). The local oscillator ensures that the incoming signal is converted to a fixed IF, regardless of its original frequency.
• IF Amplifier: The IF amplifier amplifies the intermediate frequency signal and provides additional filtering to improve selectivity and sensitivity.
• Detector: The detector demodulates the IF signal to extract the original audio or data signal from the carrier wave.
• Audio Amplifier: The audio amplifier increases the strength of the demodulated signal to drive speakers or headphones for listening.