Volume detection method, device and circuit and terminal equipment

Abstract

The invention discloses a volume detection method, device and circuit and terminal equipment. The volume detection circuit comprises a linkage potentiometer, a power supply and a controller, wherein the linkage potentiometer comprises a first variable resistor and a second variable resistor; a first fixed end of the first variable resistor is connected with an audio signal input end; a second fixed end of the first variable resistor is grounded; a regulating end of the first variable resistor is connected with an audio processing circuit; a first fixed end of the second variable resistor is connected with the power supply; a second fixed end of the second variable resistor is grounded; a regulating end of the second variable resistor is connected with an input end of the controller; and the controller is used for determining a current volume value according to a current rotating angle of the linkage potentiometer. Therefore, real-time detection on the volume is implemented by the linkage potentiometer; the detection mode is simple and accurate; interference to audio output quality is avoided; convenience, rapidness and accuracy of volume detection are improved; and the diversity of the volume detection method is expanded.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to a volume detection method, device, circuit and terminal equipment. Background technique [0002] With the development of terminal equipment manufacturing technology, the functions of the terminal equipment are more and more diversified, and the audio services provided by the terminal equipment are also gradually increasing, such as music playback and voice reminder services. When the terminal device provides audio services, functions such as displaying the current volume level, or adjusting the output volume according to the current environmental noise depend on the acquisition of the output volume by the main control chip. [0003] In the prior art, the way for the main control chip to obtain the output volume is mainly: the main control chip detects the output of the audio signal and converts the analog audio signal through the internal analog-to-digital converter t...

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Problems solved by technology

[0004] However, in the above method of obtaining the output volume, since the audio signal is a changing analog signal, the corresponding relationship between the changing analog signal and the volume value requires a large number of complicated calculations (including obtaining sampled values ​​and calculating averages, etc.) , and when the analog signal corresponding to the audio signal is output to the main control chip, some other circuits connected to the main control chip will generate interference signals and transmit them to the analog audio signal, thus affecting the output quality of the audio signal

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