Audio drive circuit and method for loudspeaker and intelligent terminal
An audio drive and drive circuit technology, applied in the field of electroacoustics, can solve problems such as sound distortion, unbalanced voice coil, noise, etc., and achieve the effect of solving sound distortion
Inactive Publication Date: 2016-11-09
SHENZHEN TINNO WIRELESS TECH
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is to provide a speaker audio driver for the problems in the prior art that the voice coil is in an unbalanced state due to the limitation of the structural space when the speaker in the smart terminal is working, which in turn leads to sound distortion and noise. Circuit, method and intelligent terminal
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[0028] It should be understood that the specific embodiments described here are only used to explain the present invention, and are not intended to limit the present invention.
[0029] like figure 1 Shown is a schematic structural diagram of an embodiment of the speaker audio drive circuit of the present invention, the circuit 100 includes a digital-to-analog converter 110 , a power amplifier 120 , a detection module 130 and a negative feedback module 140 . The input terminal of the digital-to-analog converter 110 inputs the processed audio digital signal, and the processed audio digital signal is obtained by the player playing the audio file and undergoing processing such as digital gain. The output terminal of the digital-to-analog converter 110 is connected to the input terminal of the power amplifier 120, and the output terminal of the power amplifier 120 is connected to a speaker (not shown). The processed audio digital signal passes through the digital-to-analog conver...
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The invention discloses a loudspeaker audio driving method, which is applied to a driving circuit including a power amplifier, including: detecting the original driving signal output by the power amplifier; The vibration information under the drive controls the power amplifier to output a new drive signal to drive the speaker so that the amplitude of the vibration element is symmetrical and reaches a preset value. The invention also discloses a corresponding circuit and an intelligent terminal. The invention controls the vibrating element of the driving speaker by detecting the driving signal in real time and pre-analyzing the vibration of the vibrating element of the loudspeaker driven by the driving signal, so as to keep the amplitude of the vibrating element constant, and solve the problem caused by the unbalanced state of the voice coil. Abnormal problems such as sound distortion and noise.
Description
technical field [0001] The present invention relates to the technical field of electroacoustics, and more specifically, relates to a loudspeaker audio driving circuit, method and intelligent terminal. Background technique [0002] In existing smart terminals, speakers generally have sound chambers attached to them, and the sound chambers are designed to be airtight at the rear, in order to prevent the sound volume of the speakers from becoming smaller and improve the reliability of their work. [0003] In an ideal state, when the speaker is evenly stressed in the sound cavity, the voice coil is in a balanced working state. If the force is unbalanced, the voice coil will shift left and right, which will affect the vibration element of the speaker, resulting in abnormal problems such as distortion and noise. [0004] It can be seen from this that since the design of the sound cavity of the speaker of the smart terminal is limited by the structural space of the whole device, t...
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IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 张捍东倪漫利刘书定
Owner SHENZHEN TINNO WIRELESS TECH