发明授权
- 专利标题： Variable frequency class-D amplifier, control method thereof, and ramp generator therefor
- 专利标题（中）： 变频D类放大器及其控制方法及斜坡发生器
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申请号： US12857855申请日： 2010-08-17
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公开(公告)号： US08115542B2公开(公告)日： 2012-02-14
- 发明人: Pei-Cheng Huang , Jwin-Yen Guo , Shao-Ming Sun
- 申请人： Pei-Cheng Huang , Jwin-Yen Guo , Shao-Ming Sun
- 申请人地址： TW Hsinchu
- 专利权人： Richtek Technology Corp.
- 当前专利权人： Richtek Technology Corp.
- 当前专利权人地址： TW Hsinchu
- 代理机构： Rosenberg, Klein & Lee
- 优先权： TW98128086A 20090820
- 主分类号： H03F3/38
- IPC分类号： H03F3/38
摘要：
A class-D amplifier includes a ramp generator to provide a ramp signal having a frequency varying with an audio input signal, and a modulator to convert the audio input signal to a pulse width modulation signal according to the ramp signal for a driver to drive a load device. The varying frequency of the ramp signal will cause the frequency of the pulse width modulation signal unfixed and consequently improves EMI issue.
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