An electronic device, its audio processing circuit, and an audio signal output method

An audio processing and audio signal technology, which is applied in the output of audio signals, electronic equipment and its audio processing circuits, can solve problems such as difficult to meet the performance requirements of connecting high-impedance equipment, limit the application range of terminal equipment, etc., and achieve improved audio output performance, space-saving effect

Active Publication Date: 2017-08-15
VIVO MOBILE COMM CO LTD
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Problems solved by technology

Existing mobile terminal devices, such as smart phones, tablet computers / PADs, etc., usually have audio playback functions, but limited by the size of the device, usually only have a 3.5mm headphone output interface, and there is no line output interface. As a result, it is difficult to meet the performance requirements when connecting high-impedance equipment, which limits the application range of terminal equipment

Method used

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  • An electronic device, its audio processing circuit, and an audio signal output method
  • An electronic device, its audio processing circuit, and an audio signal output method
  • An electronic device, its audio processing circuit, and an audio signal output method

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Embodiment Construction

[0021] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0022] The load impedance and output current of the headphone output interface and the line output interface are different. For example, the load impedance of the headphone output interface is small, and the current is relatively large; while the line output interface generally has a slightly larger load impedance, and the current is very small. When the output interface is connected to a load device with mismatched impedance, it is difficult to ensure high audio performance. However, devices such as mobile terminals in the prior art are limited by their volume / space and can only have a smaller output interface, such as a 3.5mm headphone output interface, so they cannot be used for connecting to power amplifiers.

[0023] In view of the above deficiencie...

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Abstract

The invention provides an electronic device, its audio processing circuit, and an audio signal output method. Wherein the audio processing circuit includes: a branching unit, used to receive the analog audio signal to be processed, and output the analog audio signal to the first amplifying circuit and / or the second amplifying circuit; the first amplifying circuit is used for According to the first audio signal output standard, the received analog audio signal is subjected to power amplification processing, and then output to the gating unit; the second amplifying circuit is used to amplify the received analog audio signal according to the second audio signal output standard After the signal is subjected to power amplification processing, it is output to the gating unit; the gating unit is used to send the analog audio signal from the first amplifying circuit or the second amplifying circuit to the same output interface for output. The invention realizes the output of audio signals of different driving standards by one output interface, expands the function of the audio output interface of electronic equipment, and saves equipment space and cost.

Description

technical field [0001] The invention relates to the technical field of audio processing, in particular to an electronic device, an audio processing circuit thereof, and an output method of an audio signal. Background technique [0002] Professional audio playback equipment is usually provided with a headphone output interface and a line output interface. Among them, the characteristic of the headphone output interface is that the driving current output by this interface is relatively large, which is suitable for connecting to peripherals with low impedance; to the headphone output port. In addition, the headphone output interface is generally a 3.5mm headphone jack or a 6.35mm headphone jack, and the line output interface is generally an RCA (Radio Corporation of America, American Wireless Company) interface, also known as a lotus plug. [0003] In practical applications, the headphone output interface and the line output interface correspond to unused load devices respect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R3/00
Inventor 吴晓光王友飞于猛
Owner VIVO MOBILE COMM CO LTD
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