Audio frequency adjusting circuit

Abstract

The invention provides an audio frequency adjusting circuit which comprises an audio frequency input device and an audio frequency output device. The audio frequency input device is connected to a loudspeaker through a first audio frequency amplifying circuit, the loudspeaker outputs received voice signals of another terminal device to a user, the audio frequency output device is used for receiving voice signals of the user and uploading the voice signals to a mobile communication network through a second audio frequency amplifying circuit, and the voice signals of the user are transmitted to the other terminal device through the mobile communication network. Through a compensation circuit, the audio frequency adjusting circuit conducts power compensation on audio frequency signals input into the audio frequency input device and audio frequency signals output from the audio frequency output device, the volume of the input audio frequency signals and the volume of the output audio frequency signals are adjusted automatically according to a difference value of the volume of the received audio frequency signals and the volume of the output audio frequency signals, the call experience of the user is made to be comfortable, the arrangement of a volume key can be omitted, and therefore the compactness and the attractiveness of a mobile phone are improved further. A filtering and optimizing module is used for conducting amplification and attenuation on audio frequency signals of a master MIC and audio frequency signals of a slave MIC, and therefore the transmission rate of environmental noise is greatly reduced.

Description

technical field [0001] The invention relates to the electronic field, in particular to an audio frequency adjustment circuit. Background technique [0002] The emergence of mobile phones has changed people's living and working habits. In April 1973, Martin Cooper, a well-known American engineer and technician at Motorola, developed the first mobile phone in the United States to be used by civilians. Therefore, Martin Cooper is also known as The father of the modern mobile phone. [0003] Existing mobile phones are divided into smart phones and non-smart phones. Generally, the performance of smart phones is better than that of non-smart phones, but non-smart phones are more stable than smart phones. Most non-smart phones and smart phones use the CPU of the British ARM company architecture. The main frequency of smart phones is higher, the running speed is fast, the smart phone processes program tasks faster, and the daily life is more convenient, while the main frequency of ...

AI Technical Summary

Problems solved by technology

[0005] The present invention proposes an audio adjustment circuit, which solves the problems in the prior art that the volume is adjusted by pressing keys and the noise is transmitted synchronously

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