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发明公开
CN101193373A TD－SCDMA/GSM双模手机音频控制电路 无效 - 撤回

TD－SCDMA/GSM双模手机音频控制电路
摘要：
本发明公开了一种TD－SCDMA/GSM双模手机音频控制电路，包括GSM模块、TD－SCDMA模块、双通道模拟开关和麦克风，所述麦克风与双通道模拟开关相连接，所述双通道模拟开关分别与所述GSM模块和TD－SCDMA模块的麦克接收端相连接；在所述GSM模块和TD－SCDMA模块中，一个为主控模块，另一个为被控模块，所述双通道模拟开关的切换控制端与主控模块的信号端相连，所述切换控制端用于控制双通道模拟开关选择导通GSM模块或者TD－SCDMA模块；当所述主控模块进行语音通讯时，信号端发出低电平信号；当被控模块进行语音通信时，信号端发出高电平信号。
摘要（英）：

The invention discloses an audio control circuit for a TD-SCDMA/GSM double-mode handset, which comprises a GSM module, a TD-SCDMA module, a two-channel analog switch and a microphone. The microphone is connected with the two-channel analog switch, the two-channel analog switch is respectively connected with the microphone receiving terminals of the GSM module and the TD-SCDMA module; of the GSM module and the TD-SCDMA module, one is a main control module and the other is a controlled module; the switching control terminal of the two-channel analog switch is connected with the signal terminal of the main control module, the switching control terminal is used for controlling the two-channel analog switch to choose to switch the GSM module or the TD-SCDMA module on ; when the main control module carries out the voice communication, the signal terminal sends a low-level signal; when the controlled module carries out the voice communication, the signal terminal sends a high-level signal.

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