| 摘要 |
PURPOSE: A mobile phone with a call quality compensation circuit is provided to reduce a call volume in a silent surrounding and increase a call volume in a loud surrounding, specially compensate a call quality by changing a cut off frequency of a voice signal in the loud surrounding. CONSTITUTION: A mobile phone with a call quality compensation circuit comprises a wireless signal receiver(100), a wireless signal transmitter(102), a voice volume adjustment device(104), a call quality adjustment device(106), a signal separation filter(108), a speaker(110), a signal receiver driver(112), a signal transmitter driver(114), and a controller(116). The signal separation filter(108) changes a cut off frequency of a voice signal among the wireless signals received from the wireless signal receiver(100) according to a control signal of the cut off frequency. The controller(116) counts a corresponding gain value based on a volume adjustment signal from the voice volume adjustment device(104), and transmits a receiving gain control value and a transmission control value to the signal receiver driver(112) and the signal transmitter driver(114), respectively.
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