Question

A varactor diode is used in________________________ stage of a TV receiver.

• A. TV tuner
• B. Video IF
• C. Audio IF
• D. Synchronization

Hint:

Varactor diodes are key components in electronic tuners for frequency selection in TVs and radios.

Answer 1

The Correct Option is A

A varactor diode, or varicap diode, serves a crucial role within the TV tuner of a television receiver. Functioning as a voltage-controlled capacitor, it is a standard component in electronic tuning circuits. Within the tuner, the varactor diode facilitates channel selection by altering its capacitance in response to the tuning voltage applied. This capacitance change modifies the resonant frequency of the tuner circuit, allowing the receiver to tune into diverse broadcasting frequencies.