De-noising device and method for audio circuit of mobile terminal earphone

Abstract

The invention is adaptable to the technical field of mobile terminals and provides a de-noising device and method for an audio circuit of a mobile terminal earphone. The de-noising device includes a power source circuit, a power amplification signal detecting circuit and a noise filtering circuit. The power source circuit is used for providing the power amplification signal detecting circuit and the noise filtering circuit with a power source; the power amplification signal detecting circuit is used for detecting power amplification signals of the mobile terminal and providing a noise filtering circuit capacitance discharge path; the noise filtering circuit is used for receiving and processing noise signals so that the noise filtering circuit is cut off after the noise signals pass through a noise filtering circuit bypass and the noise filtering circuit capacitance discharge path; and the loudspeaker plays music or voice signals. An instant bypass earphone loudspeaker filters and removes noise generated by the loudspeaker due to sudden change of circuit signals through a de-noising circuit; and the user experience perception is improved. The de-noising device is simple, low in cost and wide in market prospect.

Description

technical field [0001] The invention belongs to the technical field of mobile terminals, and in particular relates to a noise canceling device and method for canceling noise in an earphone audio circuit of a mobile terminal. Background technique [0002] With the continuous development of society, the mobility of people's work and life is constantly increasing, so people's demand for mobile terminals is also increasing. In addition to making calls and text messages, people often use mobile terminals to insert earphones into mobile terminals. to play music. At present, the TI platform (Texas Instruments TI) occupies a very large proportion of mobile terminals. The TI platform is highly integrated and stable in performance, so it has a wide range of applications. However, when using the TI platform, there is a defect in the audio circuit, that is, when the When making a call or answering a call, switch to listening to music, and when playing music for the first time, if you ...

AI Technical Summary

Problems solved by technology

[0018] The purpose of the present invention is to provide a noise elimination device and method for eliminating the noise of the audio circuit of the earphone of the mobile terminal, aiming at solving the problem of the noise generated by the sudden change of the line signal when the earphone is connected to work

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