- 专利标题: Signal amplitude-selected signal predistortion in an amplifier
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申请号: US17348982申请日: 2021-06-16
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公开(公告)号: US11539331B2公开(公告)日: 2022-12-27
- 发明人: Amar Vellanki , Xin Zhao , Jing Bai , John L. Melanson , Ku He , Wai-Shun Shum , Xiaofan Fei , Alan M. Morton
- 申请人: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- 申请人地址: GB Edinburgh
- 专利权人: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- 当前专利权人: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR LTD.
- 当前专利权人地址: GB Edinburgh
- 代理机构: Mitch Harris, Atty at Law, LLC
- 代理商 Andrew M. Harris
- 主分类号: H03F1/32
- IPC分类号: H03F1/32 ; H04R3/02 ; H03F3/183 ; H04R29/00
摘要:
An amplification system with an output driver stage for providing an output signal to acoustic output transducers such as speakers or haptic output devices removes signal distortion caused by output stage non-linearities by pre-distorting an input signal. The system includes the output driver stage, an input stage for receiving the input signal, and a processing block that receives the input signal and provides an output signal to the output driver stage. The processing block includes a pre-distortion circuit that applies a pre-distortion function to the input signal to generate the output signal if a signal level of the input signal is greater than a threshold amplitude, and if the signal level is less than or equal to the threshold amplitude, generates the output signal from the input signal by bypassing the pre-distortion circuit.
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