| 摘要 |
An audio system includes a speaker load and a class D amplifier including a class D PWM modulator for generating a first and a second PWM signals having three differential output levels. The class D amplifier includes a differential output operator for operating a first and a second output signals to a first and a second output terminals in response to the first and the second PWM signals and each of the first and the second output signals have three differential output levels. A reverse common-mode signal generator is combined with the first and the second output signals to provide a reverse common-mode signal. The audio system includes one or more output terminals for providing the reverse common-mode signal and includes a wire or a tray on a PCB combined with the signal. [Reference numerals] (103) Generator;(AA,BB) Comparator;(CC) Speaker load |
