Question

Fidelity is nothing but an ability of amplifier to reproduce ________

(a) Input signal without any distortion

(b) Output signal without any distortion

(c) Phase shift signal

(d) Amplitude shift signal

The question was posed to me in unit test.

Query is from Frequency Compensation topic in portion Frequency Response of Electronic Devices & Circuits

Answer 1

Right answer is (a) Input signal without any distortion

The explanation is: Fidelity is the property of amplifier which is usually taken into consideration during the analysis of an amplifier’s frequency response. The ability or a potential of an amplifier in order to reproduce the distortion-less nature of input signal is known as ‘Fidelity’.

Fidelity of an amplifier is dependent on the frequency response and the bandwidth of an amplifier to the greater extent. Fidelity gives an implication of satisfying the condition of distortion less output.

This condition for distortion-less output implies that gain of an amplifier should be independent of frequency (constant) while the phase shift introduced by an amplifier should reveal proportionality with respect to frequency or zero.