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Audio circuit and system

A circuit and audio technology, applied in the field of audio system, can solve the problems affecting the output sound quality and timbre details of the full-frequency audio system, and the difficulty in the design of the full-frequency audio system, so as to broaden the low-frequency response and increase the system damping , Eliminate the effect of frequency amplitude distortion and nonlinear distortion

Active Publication Date: 2018-09-28
祁家堃 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Make the design of the full frequency domain sound system more difficult
[0006] In summary, the traditional full-frequency audio system still has the above-mentioned defects, which affect the sound quality of the output sound of the full-frequency audio system and the details of the timbre.

Method used

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  • Audio circuit and system
  • Audio circuit and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0107] figure 1 It is a schematic diagram of the module connection of the audio circuit of Embodiment 1, such as figure 1 As shown, the sound circuit includes a first filter unit 100, a second filter unit 101 and a speed feedback audio power amplification unit 102;

[0108] The input terminal Vi(h) of the first filter unit 100 and the input terminal Vi(l) of the second filter unit 101 are both used to input the same sound source signal Vi;

[0109] After the first filter unit 100 and the second filter unit 101 receive the sound source signal Vi, the first filter unit 100 and the second filter unit 101 respectively filter the sound source signal Vi independently. Wherein, the first filter unit 100 is used to separate the high frequency range from the sound source signal Vi, and the second filter unit 101 is used to separate the low frequency range from the sound source signal Vi.

[0110] The output terminal Vo(h) of the first filter unit 100 is used to connect the tweeter un...

Embodiment 2

[0119] figure 2 It is a schematic diagram of the connection of the audio circuit module of Embodiment 2, such as figure 2 As shown, the first filter unit 100 includes a first high-pass filter 1000 and a second high-pass filter 1001;

[0120] The output terminal Vo1 of the first high-pass filter 1000 is connected to the input terminal Vi2 of the second high-pass filter 1001; wherein, the input terminal Vi1 of the first high-pass filter 1000 is the input terminal Vi(h) of the first filter unit 100, and the first high-pass filter 1000 is the input terminal Vi(h). The output terminal Vo2 of the second high-pass filter 1001 is the output terminal Vo(h) of the first filter unit 100 .

[0121] Wherein, both the first high-pass filter 1000 and the second high-pass filter 1001 are high-pass active filters, and the frequency division points of the first high-pass filter 1000 and the second high-pass filter 1001 are the same. Optionally, the high-pass active filter is a Butterworth f...

Embodiment 3

[0129] image 3 It is a schematic diagram of the circuit structure of the first high-pass filter or the second high-pass filter, such as image 3 As shown, the first high-pass filter 1000 and the second high-pass filter 1001 both include an operational amplifier Uh, a feedback resistor Rf, a filter resistor Rgnd, a first filter capacitor CP1 and a second filter capacitor CP2;

[0130] One end of the first filter capacitor CP1 is the input terminal (Vi1 and Vi2) of the first high-pass filter 1000 and the second high-pass filter 1001, the other end is connected to one end of the second filter capacitor CP2, and the other end of the second filter capacitor CP2 is connected to The non-inverting input terminal of the operational amplifier Uh;

[0131] The non-inverting input terminal of the operational amplifier Uh is grounded through the filter resistor Rgnd;

[0132] The output terminal of the operational amplifier Uh is connected to the inverting input terminal of the operatio...

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PUM

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Abstract

The invention relates to an audio circuit and system. A relatively smooth amplitude response can be provided in a full frequency-domain audio system formed by combining two loudspeaker units, and thephase difference of a first filter unit and a second filter unit can be controlled to be in a preset phase difference range in an effective play frequency range. Accordingly, the phase difference of the tweeter loudspeaker unit and the woofer loudspeaker unit tend to zero and linearity, and then sounds of the tweeter unit and the woofer unit are integrated into one sound source. Meanwhile, the output signal quality of the second filter unit is improved by means of a speed feedback audio power amplification unit to improve the play effect of the woofer loudspeaker unit, and then the sound quality level of the full frequency-domain audio system is comprehensively increased.

Description

technical field [0001] The invention relates to the technical field of audio systems, in particular to an audio circuit and system. Background technique [0002] A frequency divider is generally used for a sound composed of several speakers with different effective operating frequency ranges. Among them, there are two forms of frequency dividers: passive and active, namely passive frequency division and active frequency division. Among them, the frequency divider can divide one audio source signal into two or more output signals, and transmit them to the corresponding audio power amplifier according to the output signal, and drive the speaker to produce sound after power amplification. [0003] The traditional method of measuring the performance of a full-frequency audio system is mainly to measure the amplitude-frequency characteristics of sounds in different frequency bands in a full-frequency audio system, and to consider the sound quality of the sound according to the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/04H04R3/12H04R1/22
CPCH04R1/22H04R3/04H04R3/12
Inventor 祁家堃
Owner 祁家堃
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