Abstract: An audio system performing a class-D amplification includes a first pulse width modulation (PWM) signal generation unit and a second PWM signal generation unit. The first PWM signal generation unit generates a first switching signal based on a first audio signal. The second PWM signal generation unit generates a second switching signal based on a second audio signal. The second switching signal has a frequency difference with respect to the first switching signal such that a harmonic frequency component generated by interference between the first switching signal and the second switching signal is removed. Accordingly, the audio system performing the class-D amplification may improve a signal to noise ratio by minimizing influence of the harmonic frequency components on the first and second switching signals.

Abstract: An audio system performing a class-D amplification includes a first pulse width modulation (PWM) signal generation unit and a second PWM signal generation unit. The first PWM signal generation unit generates a first switching signal based on a first audio signal. The second PWM signal generation unit generates a second switching signal based on a second audio signal. The second switching signal has a frequency difference with respect to the first switching signal such that a harmonic frequency component generated by interference between the first switching signal and the second switching signal is removed. Accordingly, the audio system performing the class-D amplification may improve a signal to noise ratio by minimizing influence of the harmonic frequency components on the first and second switching signals.