Audio Amplifier
Posted on Monday, February 1, 2010 in Car Amplifiers
explain why a square wave can be used to test an audio frequency amplifier?
explain why a square wave can be used to test an audio frequency amplifier.
is there any advantage in using square waves of different frequencies to do the test?
using relevant diagrams
By 'testing' the audio amplifier, we want to find out how well it amplifies different input frequencies. A square wave can be made by adding together many different harmonics of sine waves.
http://www.bores.com/courses/intro/freq/3_ft.htm
Thus, by passing a square wave into the input of the amplifier and measuring the output on an oscilloscope, you can see how linear the amplifier is by the shape of the output signal.
Loss of low frequencies will cause the output square wave to have rounded edges. Loss of high frequencies will show up as ripples on the square wave output.
Cheers,
A.
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