Electromotive force-driven digital power amplifier system

A technology of digital power amplifier and electromotive force, applied in the direction of electrical components, transducer circuits, sensors, etc., can solve problems such as speaker sound distortion, achieve the effect of correcting sound distortion and compensating for energy loss

Pending Publication Date: 2018-05-08
SMS PROFESSIONAL AUDIO EQUIP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no power amplifier system on the market that can effectively solve speaker sound distortion. This is a great pity for the audio industry.

Method used

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  • Electromotive force-driven digital power amplifier system
  • Electromotive force-driven digital power amplifier system
  • Electromotive force-driven digital power amplifier system

Examples

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Embodiment Construction

[0014] refer to figure 1 , the electromotive force driven digital power amplifier system of the present invention includes a speaker 1 and a digital power amplifier module 2 for driving the speaker 1 to sound, and the digital power amplifier module 2 includes an amplification unit 21, a positive feedback circuit, a negative feedback circuit and is used for the digital power amplifier module. 2. A matching circuit that converts the output digital signal into an analog signal that drives the speaker 1 to produce sound. The positive feedback circuit feeds back the output of the speaker 1 to the positive input terminal of the amplifying unit 21, and the negative feedback circuit feeds back the output of the speaker 1 to the amplifying unit 21. The negative input end of the negative pole, the matching circuit is connected in series between the positive feedback circuit and the amplifying unit 21 . Specifically, the positive feedback circuit and the negative feedback circuit respect...

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PUM

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Abstract

The invention discloses an electromotive force-driven digital power amplifier system. The electromotive force-driven digital power amplifier system comprises a loudspeaker and a digital power amplification module for driving the loudspeaker to make sound, wherein the digital power amplification module includes an amplification unit, a positive feedback circuit, a negative feedback circuit, and a matching circuit for converting a digital signal output from the digital power amplification module into an analog signal for driving the loudspeaker to make a sound; the positive feedback circuit is used for feeding back the output of the loudspeaker to a positive input end of the amplification unit; the negative feedback circuit is used for feeding back the output of the loudspeaker to a negativeinput end of the amplification unit; and the matching circuit is connected in series between the positive feedback circuit and the amplification unit. Feedback compensation is performed in the digital power amplification module, so that the output of the digital power amplification module is proportional to the sound output of the loudspeaker, thereby correcting the sound distortion of the loudspeaker, and making the digital power amplification system consisting of the digital power amplification module and the loudspeaker belong to a real electric network system.

Description

technical field [0001] The invention relates to the field of power amplifiers, in particular to an electromotive force driven digital power amplifier system. Background technique [0002] The society has entered the digital age, and audio power amplifiers have also entered the digital age-digital power amplifiers. Compared with analog power amplifiers, digital power amplifiers have the characteristics of high power, low power consumption, small volume, light weight, and low heat generation. It is a green and environmentally friendly product that is very popular among consumers. But digital power amplifiers have a fatal shortcoming, that is, their sound quality is worse than that of analog power amplifiers. Therefore, digital power amplifiers still cannot completely replace analog power amplifiers. The sound quality of digital power amplifiers is a worldwide problem. [0003] Current power amplifiers can be divided into voltage-type power amplifiers and current-type power am...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/00H04R9/02H04R9/06
CPCH04R3/00H04R9/02H04R9/06
Inventor 方炳钧
Owner SMS PROFESSIONAL AUDIO EQUIP
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