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公开(公告)号：EP3703254A1
公开(公告)日：2020-09-02
申请号：EP20162162.0
申请日：2016-04-06
申请人： NXP B.V.
发明人： BERKHOUT, Marco , DOOPER, Lûtsen Ludgerus Albertus Hendrikus , VAN DOMMELEN, Maarten Wilhelmus Henricus Marie , SCHUURMANS, Han Martijn
摘要： An audio amplifier system is described comprising: a variable gain audio processor for processing digital audio signal, a digital to analog converter coupled to the audio processor, and configured to receive the processed digital audio signal, a variable gain amplifier having an input coupled to the output of the digital to analog converter and operably connected to a power supply, a controller coupled to the variable gain audio processor and the variable gain amplifier and configured to switch the audio amplifier system between a first operating mode having a first power supply voltage value and a second operating mode having a second higher power supply voltage value; wherein the controller is operable in the first operating mode to set the audio amplifier system gain to a desired gain value and in the second operating mode to maintain the desired gain value by increasing the gain of the variable gain amplifier and decreasing the gain of the variable gain audio processor with respect to the first operating mode.
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公开(公告)号：EP3229371B1
公开(公告)日：2020-03-11
申请号：EP16164084.2
申请日：2016-04-06
申请人： NXP B.V.
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公开(公告)号：EP3229371A1
公开(公告)日：2017-10-11
申请号：EP16164084.2
申请日：2016-04-06
申请人： NXP B.V.
发明人： BERKHOUT, Marco , DOOPER, Lûtsen Ludgerus Albertus Hendrikus , VAN DOMMELEN, Maarten Wilhelmus Henricus Marie , SCHUURMANS, Han Martijn
摘要： An audio amplifier system is described comprising: a variable gain audio processor for processing digital audio signal, a digital to analog converter coupled to the audio processor, and configured to receive the processed digital audio signal, a variable gain amplifier having an input coupled to the output of the digital to analog converter and operably connected to a power supply, a controller coupled to the variable gain audio processor and the variable gain amplifier and configured to switch the audio amplifier system between a first operating mode having a first power supply voltage value and a second operating mode having a second higher power supply voltage value; wherein the controller is operable in the first operating mode to set the audio amplifier system gain to a desired gain value and in the second operating mode to maintain the desired gain value by increasing the gain of the variable gain amplifier and decreasing the gain of the variable gain audio processor with respect to the first operating mode.
摘要翻译： 描述了一种音频放大器系统，包括：用于处理数字音频信号的可变增益音频处理器，耦合到音频处理器并被配置为接收经处理的数字音频信号的数模转换器，可变增益放大器，具有耦合到 数字模拟转换器的输出并且可操作地连接到电源;耦合到可变增益音频处理器和可变增益放大器的控制器，并且被配置为将音频放大器系统在具有第一电源电压值的第一操作模式和 具有第二较高电源电压值的第二操作模式; 其中所述控制器可操作于所述第一操作模式以将所述音频放大器系统增益设定为期望增益值且处于所述第二操作模式中以通过增加所述可变增益放大器的所述增益并减小所述变量的增益来维持所述期望增益值 获得关于第一操作模式的音频处理器。
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