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Which device is used in TV receivers for tuning the receiver to the incoming signal?

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in Analog Communications by (122k points)
Which device is used in TV receivers for tuning the receiver to the incoming signal?

(a) Varacter diode

(b) High pass filter

(c) Low pass filter

(d) Bandpass filter

This question was addressed to me at a job interview.

My doubt is from AGC in portion Receivers & Transducers of Analog Communications

1 Answer

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Best answer
Right option is (a) Varacter diode

For explanation I would say: Varacter diodes have variable capacitance as a function of variable input voltage. It works in reverse bias. It is generally used for tuning the receivers according to an incoming signal. It is also used in RF filters for tuning purposes such as tuning of TV sets.

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