发明名称 Digital filtering in a Class D amplifier system to reduce noise fold over
摘要 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.
申请公布号 US8189802(B2) 申请公布日期 2012.05.29
申请号 US20090407238 申请日期 2009.03.19
申请人 MIAO GUOQING;SIENKO MATT;BAZARJANI SEYFOLLAH;QUALCOMM INCORPORATED 发明人 MIAO GUOQING;SIENKO MATT;BAZARJANI SEYFOLLAH
分类号 H04R3/02 主分类号 H04R3/02
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