Why does signal distortion occur when transmitting an audio signal through a nonlinear amplifier, despite the input signal being a pure sine wave?

💡 Explanation

Nonlinear amplifiers introduce signal distortion because they do not preserve the linear relationships between input and output signals. This is due to harmonic generation via homomorphisms, which map the original signal to higher-frequency components; therefore, new frequencies emerge, distorting the original sine wave, rather than simply amplifying it linearly.

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