An audio processing circuit and a communication terminal

Abstract

The invention belongs to the field of mobile phone communication and provides an audio processing circuit and a communication terminal. The audio processing circuit comprises a first level filter circuit and a second level filter circuit, the first level filter circuit comprises a first level difference mode filter unit, a first level common mode filter unit and a first level magnetic bead filter unit, the first level difference mode filter unit, the first level common mode filter unit and the first level magnetic bead filter unit are sequentially connected, the second level filter circuit comprises a second level difference mode filter unit, a second level common mode filter unit and a second level magnetic bead filter unit, the second level difference mode filter unit, the second level common mode filter unit and the second level magnetic bead filter unit are sequentially connected, and the first level magnetic bead filter unit is connected with the second level magnetic bead filter unit. According to the audio processing circuit and the communication terminal, two-level filter circuits are utilized to process audio frequency, and influences of radio frequency and other high speed signal line radiation can be remarkably eliminated twice.

Description

technical field [0001] The invention belongs to the field of mobile phone communication, in particular to an audio processing circuit and a communication terminal. Background technique [0002] The most basic function of a mobile phone is communication. The communication process is the process of sending and receiving information by the radio frequency module. Information is transmitted in the form of electromagnetic waves. When the mobile phone is sending and receiving information, the electromagnetic field around the mobile phone is relatively strong, and these electromagnetic fields affect the voice quality of the mobile phone itself. . The source of mobile phone radiation comes from the antenna. With the rapid development of electronic technology and the advancement of communication technology, the size of mobile phones is getting thinner and thinner. The distance between mobile phone audio components such as MIC, receiver and speaker and antenna is getting closer. The ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide an audio processing circuit, which aims to solve the problem that the existing mobile phone is easily subject to radio frequency interference due to the large distance from the motherboard to the receiver, which affects the quality of the call

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