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A digital audio power amplifier system

A power amplifier system, digital audio technology, applied in electrical components, speaker distribution signals, signal processing, etc., can solve the problem of loud noise heard by speakers, uncontrollable power supply rejection ratio, power supply fluctuation, etc., to reduce noise, improve, etc. Effective output impedance, reducing the effect of the influence of the power supply rejection ratio

Pending Publication Date: 2018-12-21
SHANGHAI AWINIC TECH CO LTD
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the current digital audio power amplifier system needs to draw a large amount of current from the power supply in order to output higher transmission power. Because the power supply has a certain internal resistance, there will be large-scale fluctuations on the power supply continuously, that is, the power supply cannot be controlled. ratio, and then a louder noise will be heard on the speaker

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  • A digital audio power amplifier system
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Embodiment Construction

[0054] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0055] In order to make the above objectives, features and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0056] reference figure 1 , figure 1 It is a schematic structural diagram of a digital power amplifier system provided by an embodiment of the present invention, which converts the...

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Abstract

The invention discloses a digital audio power amplifier system. The digital audio power amplifier system reduces the influence of the first current source module on the power supply rejection ratio byincreasing the equivalent output impedance of the first current source module and the second current source module, improves the matching degree between the voltage divider resistors, further improves the power supply rejection ratio of the digital audio power amplifier system, and eliminates the noise on the horn.

Description

Technical field [0001] The invention relates to the technical field of semiconductor integrated circuits, and more specifically, to a digital audio power amplifier system. Background technique [0002] At present, Class D audio power amplifiers are widely used due to their efficiency of more than 80%. In particular, high efficiency is very important for mobile devices. It can not only extend the working time, but also reduce the heat generation of handheld devices such as mobile phones. [0003] In applications such as mobile phones, volume and sound quality will have an important impact on user experience. The current trend is that audio amplifiers output higher power to obtain greater volume and better sound quality. [0004] However, the current digital audio power amplifier system needs to draw a large amount of current from the power supply in order to output higher transmission power. Because the power supply has a certain internal resistance, there will be a large range of flu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/12
CPCH04R3/12H04R2430/00
Inventor 周佳宁
Owner SHANGHAI AWINIC TECH CO LTD