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1. 发明公开

EP3110004A4 AUDIO SIGNAL AMPLIFICATION APPARATUS 有权
标题翻译： TONSIGNALVERSTÄRKUNGSVORRICHTUNG
公开(公告)号：EP3110004A4
公开(公告)日：2017-03-01
申请号：EP14883059
申请日：2014-11-26
申请人： PANASONIC IP MAN CO LTD
发明人： IWATA KAZUYA
IPC分类号： H03F3/217 , G10L21/0208 , H03F1/32 , H03F1/34 , H03F3/181 , H03F3/183 , H04R3/04
CPC分类号： H04R3/04 , G10L21/0208 , H03F1/34 , H03F3/183 , H03F3/217 , H03F3/2171 , H03F3/2173 , H03F3/2175 , H03F2200/03 , H03F2200/171 , H03F2200/331 , H03F2200/351 , H03F2200/432
摘要： An audio signal amplification device of the disclosure includes: a delta-sigma modulation part configured to resample an input digital audio signal with a quantization number smaller than a quantization number of the digital audio signal; a pulse-width modulation part configured to convert an output signal from the delta-sigma modulation part into a pulse-width modulation signal which sets a gradation of the output signal in an amplitude direction at a gradation of a pulse width; a power amplification part configured to perform power amplification on an output signal from the pulse-width modulation part; a low-pass filter configured to diminish a component higher than a predetermined cutoff frequency, in an output signal from the power amplification part, and to output the resultant signal; and a correction processing part configured to generate a correction signal for correcting the digital audio signal. The correction processing part includes a switch configured to control coupling of the correction processing part to the low-pass filter. When the switch is on, the correction processing part couples a loudspeaker to the low-pass filter, and generates the correction signal.
摘要翻译：本发明的音频信号放大设备包括：三角积分调制部分，被配置为以比数字音频信号的量化数小的量化数重采样输入的数字音频信号; 脉冲宽度调制部分，其被配置为将来自所述德耳塔西格玛调制部分的输出信号转换成脉冲宽度调制信号，所述脉冲宽度调制信号将所述输出信号的灰度在幅度方向上设置为脉冲宽度的灰度; 功率放大部件，被配置为对来自所述脉冲宽度调制部件的输出信号执行功率放大; 低通滤波器，其被配置为在来自所述功率放大部件的输出信号中减小高于预定截止频率的分量，并且输出结果信号; 以及校正处理部分，被配置为生成用于校正数字音频信号的校正信号。校正处理部分包括被配置为控制校正处理部分与低通滤波器的耦合的开关。当开关接通时，校正处理部分将扬声器耦合到低通滤波器，并产生校正信号。

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