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    • 59. 发明授权
    • Method and apparatus for pulse width modulation in a switching amplifier
    • 开关放大器中的脉宽调制方法和装置
    • US07724082B2
    • 2010-05-25
    • US11913113
    • 2006-05-04
    • Sang Jin ParkYong Hun ChoYun Do Kim
    • Sang Jin ParkYong Hun ChoYun Do Kim
    • H03F3/38
    • H04L25/4902H03F3/217H03K7/08
    • There is provided a method and apparatus for output pulse width modulation in a digital amplifier including: a determining step of adding or subtracting a value corresponding to a predetermined offset to or from an input audio signal alternately according to a period of the input audio signal, thereby determining a sign of a resulting value of adding or subtracting; a switching step of outputting the input audio signal to a first port based on the determined sign, or outputting the input audio signal to a second port after inverting the input audio signal into a positive number; an adjusting step of adding a value of a predetermined switching time to the audio signals output from the first port and the second port, and outputting a resulting value of adding; and a modulating step of performing pulse width modulation on the audio signals output from the adjusting step and outputting a first modulation signal and a second modulation signal.
    • 提供了一种数字放大器输出脉冲宽度调制方法和装置,包括:根据输入音频信号的周期交替地向输入音频信号输入或从输入音频信号中减去与预定偏移相对应的值的确定步骤, 从而确定加法或减法的结果值的符号; 切换步骤,基于所确定的符号将输入音频信号输出到第一端口,或者在将输入音频信号反转为正数之后将输入音频信号输出到第二端口; 调整步骤,对从所述第一端口和所述第二端口输出的音频信号添加预定切换时间的值,并输出所得到的加法值; 以及对从调整步骤输出的音频信号进行脉宽调制并输出第一调制信号和第二调制信号的调制步骤。