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Harmonic distortion in power amplifiers. THD, THD+N ...
https://www.circuitstoday.com/harmonic-distortion-in-power-amplifiers#:~:text=Harmonic%20distortion%20in%20power%20amplifiers%20are%20mainly%20caused,and%20this%20is%20the%20reason%20behind%20the%20non-linearity.
Audio Amplifiers - HyperPhysics Concepts
http://hyperphysics.phy-astr.gsu.edu/hbase/Audio/amp.html
Harmonic Distortion. A common type of amplifier distortion is called harmonic distortion. It can arise if any component in the amplifer clips the peaks of the waveform. A common specification for high fidelity amplifiers is the total harmonic distortion. This distortion may be less than 1%, or even less than 0.5% from 20-20,000 Hz for high quality amplifiers.
Harmonic distortion in power amplifiers. THD, THD+N ...
https://www.circuitstoday.com/harmonic-distortion-in-power-amplifiers
Harmonic distortion in power amplifiers are mainly caused by the non linearities of the active elements (transistors). The active element used for amplification whether BJT, FET, MOSFET or anything like that may not equally amplify every points in the input waveform and this is the reason behind the non-linearity.
DISTORTION MEASUREMENT IN AUDIO AMPLIFIERS
https://renardson-audio.com/distortiontest.pdf
standard for audio power amplifiers specifies a maximum r.m.s. total harmonic distortion of 1 % for sine wave signals from 40 Hz to 12.5 kHz for any power output between 100 mW
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