发明授权
- 专利标题： Low frequency noise reduction circuit architecture for communications applications
- 专利标题（中）： 用于通信应用的低频降噪电路架构
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申请号： US11523693申请日： 2006-09-20
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公开(公告)号： US08705752B2公开(公告)日： 2014-04-22
- 发明人: Xicheng Jiang , Jungwoo Song , Jianlong Chen
- 申请人： Xicheng Jiang , Jungwoo Song , Jianlong Chen
- 申请人地址： US CA Irvine
- 专利权人： Broadcom Corporation
- 当前专利权人： Broadcom Corporation
- 当前专利权人地址： US CA Irvine
- 代理机构： Sterne, Kessler, Goldstein & Fox P.L.L.C.
- 主分类号： H04R5/00
- IPC分类号： H04R5/00
摘要：
A noise reduction circuit for reducing the effects of low frequency noise such as wind noise in communications applications is described. In one embodiment, the noise reduction circuit features a high pass filter formed by exploiting the existing off-chip AC coupling capacitances in making the connection to the source of audio signals. The filter may be adaptive to environmental low frequency noise level through programming the shunt resistances. A low-noise wide dynamic range programmable gain amplifier is also described. Adaptive equalization of the audio signal is also described through the utilization of programmable front-end resistors and a back-end audio equalizer.
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