发明名称 |
Audio Communication Unit and Integrated Circuit |
摘要 |
An audio communication unit comprises a receiver for receiving an audio signal, a sigma-delta modulator operably coupled to the receiver and arranged to modulate the received audio signal, and a class-D amplifier stage operably coupled to the sigma-delta modulator and arranged to amplify the modulated received audio signal. One or more feedback path(s) is/are arranged from an output of the class-D amplifier stage to the sigma-delta modulator. The provision of one or more feedback path(s) from the output of the class-D audio amplifier to the sigma-delta modulator facilitates smaller die size; higher power efficiency and power supply rejection ratio/intermodulation cancellation performance.
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申请公布号 |
US2008268807(A1) |
申请公布日期 |
2008.10.30 |
申请号 |
US20050815177 |
申请日期 |
2005.01.31 |
申请人 |
FREESCALE SEMICONDUCTOR, INC. |
发明人 |
ODDOART LUDOVIC;TRAUTH GERHARD |
分类号 |
H04B1/16 |
主分类号 |
H04B1/16 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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