Distortionmeter
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A distortionmeter (or more precisely distortion factor meter) is an electronic measuring instrument which displays the amount of distortion added to the original signal by an electronic circuit.
A distortionmeter (or more precisely distortion factor meter) is an electronic measuring instrument which displays the amount of distortion added to the original signal by an electronic circuit. {f_i}=a_1 \cdot sin(\omega t) The normalized output is {f_o}=a_1 \cdot sin(\omega t)+a_2 \cdot sin(2 \omega t)+a_3 \cdot sin(3 \omega t)+.. The value of Total Harmonics Distortion (THD) is defined as the ratio of the harmonics to the fundamental; i.e., THD = \frac{\sqrt{{a_2}^2+{a_3}^2+..}}{a_1} This ratio can be given in dB or in percentage.
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Text derived from https://en.wikipedia.org/w/index.php?oldid=1305149127 under CC BY-SA 4.0; modifications have been made.