Electronic device, audio processing circuit thereof, and output method of audio signal

An audio processing and audio signal technology, applied in the field of audio signal output, electronic equipment and its audio processing circuit, can solve problems such as difficulty in meeting the performance requirements of connecting high-resistance equipment, limiting the application range of terminal equipment, etc., to improve audio output Performance, space saving effect

Active Publication Date: 2016-08-03
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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  • Electronic device, audio processing circuit thereof, and output method of audio signal
  • Electronic device, audio processing circuit thereof, and output method of audio signal
  • Electronic device, audio processing circuit thereof, and output method of audio signal

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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 present invention provides an electronic device, an audio processing circuit thereof, and an output method of an audio signal. The audio processing circuit comprises a branching unit for receiving an analog audio signal to be processed and outputting the analog audio signal to a first amplifying circuit and / or second amplifying circuit, the first amplifying circuit for carrying out power amplification processing on the received analog audio signal according to a first audio signal output standard and outputting the signal to a gating unit, the second amplifying circuit for carrying out power amplification processing on the received analog audio signal according to a second audio signal output standard and outputting the signal to the gating unit, and the gating unit used for sending the analog audio signal from the first amplifying circuit or the second amplifying circuit to a same output interface for outputting. According to the invention, the outputting of the audio signals with different driving standards by one output interface is realized, the audio output interface function of the electronic device is expanded, and the device space and cost are saved.

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) 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 respectively. The headphone output...

Claims

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Application Information

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Patent Type & Authority Applications(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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