发明公开
- 专利标题： POP-UP NOISE REDUCTION IN A DEVICE
- 专利标题（中）： 设备中的弹出式降噪
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申请号： EP09806055.1申请日： 2009-11-30
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公开(公告)号： EP2507908A1公开(公告)日： 2012-10-10
- 发明人: SEEDHER, Ankit , PRABHU J, Raja , SOMAYAJULA S, Shyam
- 申请人： St-Ericsson India Pvt. Ltd. , ST-Ericsson SA
- 申请人地址： D-28 South Extension, Part 1 110049 New Delhi IN
- 专利权人： St-Ericsson India Pvt. Ltd.,ST-Ericsson SA
- 当前专利权人： St-Ericsson India Pvt. Ltd.,ST-Ericsson SA
- 当前专利权人地址： D-28 South Extension, Part 1 110049 New Delhi IN
- 代理机构： Mozzi, Matteo
- 国际公布： WO2011064787 20110603
- 主分类号： H03F1/30
- IPC分类号： H03F1/30 ; H03F3/217
摘要：
A device implementing a scheme for reduction of pop-up noise is disclosed. The device comprises an audio subsystem (100) having an integrator (112) for amplifying an input signal (133) and a modulation circuit (114) including one or more comparators. The audio subsystem (100) is further provided with a feedback loop (142) across the integrator (112) and the modulation circuit (114) to calibrate an offsets outputs of the integrator (112) and the modulation circuit (114). The feedback loop (142) includes an integrator-offset loop (202) across the integrator (112) to calibrate an offset (136) in the output of the integrator (112), and an offset calibration loop (302) across the modulation circuit (114) to calibrate an offset (140) in the output of the modulation circuit (114).
公开/授权文献
- EP2507908B1 POP-UP NOISE REDUCTION IN A DEVICE 公开/授权日：2017-06-28
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