公开(公告)号：US20110095829A1

公开(公告)日：2011-04-28

申请号：US12983412

申请日：2011-01-03

申请人： Jinghua YE ,  Hui SHEN ,  Danny LI

发明人： Jinghua YE ,  Hui SHEN ,  Danny LI

IPC分类号： H03F3/04

CPC分类号： H03F1/025 ,  H03F3/21 ,  H03F3/3081 ,  H03F2200/03 ,  H03F2200/507 ,  H03F2200/511 ,  H03F2200/516 ,  H03F2203/21196 ,  H03F2203/30072

摘要： A class G headphone amplifier circuit with improved power efficiency and low EMI. It may use an automatic signal level detector to detect the signal level of incoming signals and determine positive and negative power supplies for headphone amplifiers accordingly. A voltage generator may generate pairs of differential output voltages at a plurality of amplitude steps, and supply to headphone amplifiers the pair with the amplitude determined by the automatic signal level detector. As a result, headphone amplifiers are biased according to the input signal level, and the multiple voltage rails may improve power efficiency and avoid clipping.

摘要翻译： A类G耳机放大器电路，具有改善的功率效率和低EMI。 它可以使用自动信号电平检测器来检测输入信号的信号电平，并相应地确定耳机放大器的正负电源。 电压发生器可以以多个幅度步长产生成对的差分输出电压，并以由自动信号电平检测器确定的振幅向耳机放大器提供该对。 结果，耳机放大器根据输入信号电平被偏置，并且多个电压轨可以提高功率效率并避免削波。