| 摘要 |
Disclosed are a mobile terminal earphone line control circuit and line control method, comprising an earphone end circuit and a mobile terminal end circuit connected via a signal line; the earphone end circuit comprises an earphone end MCU microcontroller, an attenuator circuit and a microphone circuit; the mobile terminal end circuit comprises an audio analog input channel and an amplifier connected in parallel; the amplifier is connected to a mobile terminal end MCU microcontroller via a line; the mobile terminal end MCU microcontroller is connected to a central processing unit (CPU) via a line; and the earphone end MCU microcontroller is internally provided with a key detection module and a PWM module. The present invention effectively eliminates POP noise generated by pressing a key in a call, thus improving call quality. |
