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1. 发明授权

US08699963B2 Mobile communication device with receiver speaker 有权
标题翻译：带接收扬声器的移动通信设备
公开(公告)号：US08699963B2
公开(公告)日：2014-04-15
申请号：US13239485
申请日：2011-09-22
申请人： Chao Chen , Li Huang , Dan Kaufman
发明人： Chao Chen , Li Huang , Dan Kaufman
IPC分类号： H04B1/40
CPC分类号： H04M1/03 , H04M1/0214 , H04M1/0235 , H04M1/6016 , H04M1/6041 , H04M1/72558 , Y02D70/1224 , Y02D70/142 , Y02D70/144 , Y02D70/162 , Y02D70/23
摘要： An audio subsystem in a mobile communication device has a speaker. In one implementation, the audio subsystem has a higher-gain power amplifier, a lower-gain power amplifier, and a switching system configured to route signals produced by the lower-gain power amplifier to the speaker while the device is operative in a first mode and configured to route signals produced by the higher-gain power amplifier to the speaker while the device is operative in a second mode. In another implementation, the audio subsystem has a power amplifier coupled to the speaker and a power supply control controlled to provide voltage at a first voltage level to the power amplifier while the device is operative in a first mode and controlled to provide voltage at a second, higher, voltage level to the power amplifier while the device is operative in a second mode.
摘要翻译：移动通信设备中的音频子系统具有扬声器。在一个实现中，音频子系统具有较高增益功率放大器，较低增益功率放大器和配置成将该低增益功率放大器产生的信号路由到扬声器的开关系统，同时器件以第一模式工作并且被配置为在所述设备在第二模式下操作时将由所述较高增益功率放大器产生的信号路由到所述扬声器。在另一实施方式中，音频子系统具有耦合到扬声器的功率放大器和被控制为在功率放大器处提供第一电压电平的电源控制器，同时该装置以第一模式工作并被控制以在第二模式下提供电压当器件在第二模式下工作时，对功率放大器的电压电平更高。

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