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Audio switching system of mobile communication terminal

A technology of mobile communication terminal and switching system, which is applied in the field of mobile communication terminal audio switching system, and can solve the problems affecting the sound quality of the frequency response curve of the loudspeaker, etc.

Active Publication Date: 2014-12-31
富智康(南京)通讯有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the channel of the earphone is not completely cut off when the speaker is selected to play, the existence of the earphone load affects the frequency response curve of the audio signal output by the speaker and the sound quality

Method used

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  • Audio switching system of mobile communication terminal

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Embodiment Construction

[0010] Please refer to figure 1 , the mobile communication terminal audio switching system 100 of the preferred embodiment of the present invention is applied to an intelligent design platform of a mobile communication terminal, such as the MTK65XX design platform, and the mobile communication terminal can be a smart phone, a tablet computer and a personal digital assistant (personal digital assistant, PDA), etc. The mobile communication terminal audio switching system 100 includes a central processing unit (CPU) 10 , a power management unit (PMU) 20 , a switch module 30 , an audio amplifier 40 , an earphone 50 and a speaker 60 .

[0011] The CPU 10 is used for outputting audio signals of the mobile communication terminal system and controlling the PMU 20 , the switch module 30 and the audio amplifier 40 . The CPU 10 includes a right channel output terminal PR, a left channel output terminal PL, a switch control terminal PSW and an enable control terminal PEn for audio signal...

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Abstract

An audio switching system of a mobile communication terminal comprises a central processing unit (CPU), an audio amplifier, a headset, a loudspeaker, a power management unit (PMU) and a switch module. The CPU is respectively electrically connected to the control switch module, the PMU and the audio amplifier and outputs left-track audio signals and right-track audio signals. The switch module selectively transmits the right-track audio signals to the headset. The PMU selectively transmits the left-track audio signals to the headset or the audio amplifier. The audio amplifier amplifies the left-track audio signals and transmits the amplified left-track audio signals to the loudspeaker. When the headset is used, the switch module and the PMU are respectively communicated with the CPU and the headset so as to transmits the left-track audio signals and the right-track audio signals to the headset, and the switch module disconnects the CPU and the loudspeaker at the seam time; when the loudspeaker is used, the CPU turns on the audio amplifier, the PMU is communicated with the CPU and the audio amplifier, the audio amplifier amplifies the single-track audio signals and transmits the amplified audio signals to the loudspeaker, and the switch module disconnects the CPU and the headset at the same time.

Description

technical field [0001] The invention relates to an audio switching system for a mobile communication terminal, in particular to an audio switching system for a mobile communication terminal capable of eliminating crosstalk. Background technique [0002] Mobile communication terminals such as mobile phones are usually provided with loudspeakers to play audio signals, and are also provided with earphone jacks to connect earphones. Users can choose to use loudspeakers or earphones to play audio files. In the current design platform of some smart phones, when the mobile phone is connected to the earphone, it drives the external circuit of the speaker and drives the earphone at the same time. That is, the audio signal sent by the mobile phone system will be sent to the external speaker circuit and the earphone circuit at the same time, so that both the external speaker and the earphone will emit sound at the same time, resulting in a crosstalk problem. Since the channel of the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H04M1/60
Inventor 曾峰
Owner 富智康(南京)通讯有限公司
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