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Which of the following is an example of amplitude scaling?

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in Signals and Systems by (1.2m points)
Which of the following is an example of amplitude scaling?

(a) Electronic amplifier

(b) Electronic attenuator

(c) Both amplifier and attenuator

(d) Adder

I have been asked this question at a job interview.

Origin of the question is Basic Operations on Signals topic in chapter Signals and Systems Basics of Signals and Systems

1 Answer

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by (42.1k points)
Right choice is (c) Both amplifier and attenuator

Explanation: Amplitude scaling refers to multiplication of a constant with the given signal.

It is given by y (t) = a x (t).  It can be both increase in amplitude or decrease in amplitude.

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