发明名称 |
DIGITAL FILTERING IN A CLASS D AMPLIFIER SYSTEM TO REDUCE NOISE FOLD OVER |
摘要 |
<p>An improved power amplifier system is provided. The power amplifier system includes a programmable digital filter and a power amplifier, each responsive to a plurality of frequency response settings and switching frequency settings, respectively. Each frequency response setting and switching frequency setting is adaptively selected by a processor device to match a bandwidth of an incoming audio signal. The processor device identifies the current bandwidth of an incoming audio signal and adaptively selects a switching rate setting and a frequency response setting based on the current bandwidth. The frequency response setting is selected so as to reduce noise fold over in the power amplifier for a corresponding bandwidth, sampling rate setting, and switching frequency setting.</p> |
申请公布号 |
EP2409401(A1) |
申请公布日期 |
2012.01.25 |
申请号 |
EP20100716923 |
申请日期 |
2010.03.18 |
申请人 |
QUALCOMM INCORPORATED |
发明人 |
MIAO, GUOQING;SIENKO, MATT;BAZARJANI, SEYFOLLAH |
分类号 |
H03F3/217;H03F1/26;H03M3/00 |
主分类号 |
H03F3/217 |
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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