发明授权
- 专利标题： Amplifier circuit and method for improving the dynamic range thereof
- 专利标题（中）： 放大器电路及其动态范围的改善方法
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申请号： US13612805申请日： 2012-09-12
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公开(公告)号： US08717106B2公开(公告)日： 2014-05-06
- 发明人: Chi-Yao Yu , Siu-Chuang Ivan Lu , George Chien
- 申请人： Chi-Yao Yu , Siu-Chuang Ivan Lu , George Chien
- 申请人地址： TW Hsin-Chu
- 专利权人： Mediatek Inc.
- 当前专利权人： Mediatek Inc.
- 当前专利权人地址： TW Hsin-Chu
- 代理机构： McClure, Qualey & Rodack, LLP
- 主分类号： H03F3/193
- IPC分类号： H03F3/193
摘要：
The invention provides an amplifier circuit. In one embodiment, the amplifier circuit includes a first class-AB amplifier and a second class-AB amplifier. The first class-AB amplifier amplifies an input signal to generate the first output signal. The second class-AB amplifier amplifies the first output signal to generate a final output signal on an output node. When the power of the input signal is greater than a threshold level, the second class-AB amplifier is in a turned-off state during a turned-on duration period of the first class-AB amplifier, and the first class-AB amplifier is in a turned-off state during a turned-on duration period of the second-class AB amplifier.
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