CN209982680U

CN209982680U - Current type earphone amplifying circuit and earphone

Info

Publication number: CN209982680U
Application number: CN201920747703.9U
Authority: CN
Inventors: 杨东山; 张延迟
Original assignee: Beijing Zhongban Super Stereo Information Technology Co Ltd
Current assignee: Beijing Zhongban Super Stereo Information Technology Co Ltd
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-01-21
Anticipated expiration: 2029-05-23

Abstract

The utility model provides a current type earphone amplifying circuit, including current type digital-to-analog converter DAC, low frequency excitation functional unit module and heavy current output stage, current type digital-to-analog converter DAC with low frequency excitation functional unit module electricity is connected, low frequency excitation functional unit module with heavy current output stage electricity is connected; the current type digital-to-analog converter DAC converts digital audio signals into analog audio signals; the low-frequency excitation functional unit module carries out timbre excitation processing on the audio signal; the large-current output stage outputs an analog audio signal. The excitation unit of the utility model can be embedded into any audio system after realizing modularization, thus improving the whole tone quality and listening feeling; the high-current output stage not only exists as an earphone output form, but also can be expanded into amplification module units of LINE and MIC, and good overall performance can be obtained.

Description

Current type earphone amplifying circuit and earphone

Technical Field

The utility model belongs to electronic equipment especially relates to a current type earphone amplifier circuit and earphone.

Background

The common sound card can only guarantee the amplified output mode of the common standard mode earphone (or line output), and the common USB ear amplifier can only drive the common standard mode earphone, which is a common practice to enhance the low frequency energy level by low frequency boost equalization or generating subharmonic (or a combination of the two). These methods successfully produce more bass energy but have the disadvantage of a large rise in peak levels, increasing the overload distortion.

The exciting unit circuit is basically similar to the use and function of a product 'DBX 120 XP' sold in the market, the DAC part and the exciting framework of the output interface circuit are complex, a large number of direct-insert elements passing the auditory sensation test are adopted, and the overall cost is higher than that of the conventional product sold in the market.

SUMMERY OF THE UTILITY MODEL

To the not enough among the above-mentioned prior art, the utility model provides a current type earphone amplifier circuit, the excitation unit realizes that the modularization will imbed any audio system afterwards in, can promote holistic tone quality listening sensation.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a current type earphone amplifying circuit is characterized by comprising a current type digital-to-analog converter (DAC), a low-frequency excitation functional unit module and a high-current output stage, wherein the current type DAC is electrically connected with the low-frequency excitation functional unit module, and the low-frequency excitation functional unit module is electrically connected with the high-current output stage; the current type digital-to-analog converter DAC converts digital audio signals into analog audio signals; the low-frequency excitation functional unit module carries out timbre excitation processing on the audio signal; the large-current output stage outputs an analog audio signal.

Preferably, the low frequency excitation function unit module comprises a frequency point correction FC ADJ button.

Preferably, the low frequency excitation functional unit module further comprises a subharmonic synthesizer adjusting knob, and the frequency point correction FC ADJ knob and the subharmonic synthesizer adjusting knob form a middle timbre excitation processing unit.

Preferably, an access I/V conversion circuit is arranged between the current type digital-to-analog converter DAC and the low-frequency excitation functional unit module, and an input end of the access I/V conversion is connected with the current type digital-to-analog converter DAC.

Preferably, the output end of the access I/V conversion is connected with a low pass filter LPF.

Preferably, the low pass filter LPF is connected to a BUFFER, and the BUFFER is connected to an input end of the low frequency excitation functional unit module.

Preferably, the high current output stage comprises an amplifier AMP module.

Preferably, a level monitoring table of the sound volume meter VUMETER is arranged between the middle low-frequency excitation functional unit module and the amplifier AMP module and is used for detecting the output signal value.

Preferably, the amplifier AMP module is an amplification module unit of a LINE in port and/or a Mic in port.

An earphone comprises the current type earphone amplifying circuit.

Compared with the prior art, the utility model has the advantages of it is following:

1. the utility model has the main advantages that the subharmonic synthesizer subsidiary synthesizer exciter unit and the heavy current amplifier AMP module are provided; after the excitation unit is modularized, the excitation unit can be embedded into any audio system, and the overall timbre and listening feeling can be improved.

2. The utility model discloses amplifier AMP module is not only to exist as earphone output form, more can expand to the enlarged modular unit of LINE and MIC, can obtain good wholeness ability.

3. The utility model discloses output interface circuit has utilized people's auditory psychology characteristic except that the electric current type DAC of high standard has been used, has additionally increased low frequency excitation functional unit circuit, has adopted the heavy current module at the output level, no matter be high resistance earphone or low sensitivity earphone all can obtain high-quality promotion effect.

4. The utility model discloses can the signal decorate and beautify on the whole, improve the penetrating power of tone quality and sound to a considerable extent, increase the sound field sense of sound, let sound perfect more and expressive force, this circuit framework has avoided general earphone output interface circuit to lack the infectivity on the auditory sensation, through the adjustment, can obtain outstanding electric index and very good sound dyeing.

Drawings

The preferred embodiments of the present invention will be described in detail below with reference to the attached drawings, which are for the purpose of illustrating preferred embodiments of the present invention and are not for the purpose of limiting the same. In the drawings, there is shown in the drawings,

fig. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the technical solutions and advantages of the present invention more clearly understood, the following description is made in further detail with reference to the accompanying drawings. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not an exhaustive list of all embodiments. And the embodiments and features of the embodiments may be combined with each other without conflict.

A current type earphone amplifying circuit is characterized by comprising a current type digital-to-analog converter (DAC), a low-frequency excitation functional unit module and a high-current output stage, wherein the current type DAC is electrically connected with the low-frequency excitation functional unit module, and the low-frequency excitation functional unit module is electrically connected with the high-current output stage; wherein the content of the first and second substances,

the current-mode digital-to-analog converter DAC converts the digital audio signal into an analog audio signal; the low-frequency excitation functional unit module carries out timbre excitation processing on the audio signal; the large-current output stage outputs an analog audio signal.

As a preferred embodiment, the low frequency excitation function unit module includes a frequency point correction FC ADJ button.

As a preferred embodiment, the low frequency excitation function unit module further includes a subharmonic synthesizer adjustment knob, and the frequency point correction FC ADJ knob and the subharmonic synthesizer adjustment knob form a middle tone excitation processing unit.

As a preferred embodiment, the output of the access I/V conversion is connected to a low pass filter LPF.

As a preferred embodiment, the low pass filter LPF is connected to a BUFFER, and the BUFFER is connected to an input end of the low frequency excitation functional unit module.

The current type digital-to-analog converter DAC is connected with I/V conversion, a low pass filter LPF and a BUFFER BUFFER to form an input interface part.

As a preferred embodiment, the output end of the low frequency excitation functional unit module is connected with the amplifier AMP module. The amplifier AMP block forms an output stage section.

As a preferred embodiment, a level monitoring table of the sound volume table VU METER is provided between the middle portion and the output stage portion for output signal value detection.

As a preferred embodiment, the amplifier AMP module is an amplification module unit of a LINE in port and/or a Mic in port.

An earphone comprises the current type earphone amplifying circuit.

[ examples ] A method for producing a compound

As shown in fig. 1, the present embodiment provides a streaming earphone amplifying circuit, which includes a current-mode digital-to-analog converter DAC connected to an input terminal, and an I/V circuit connected to the DAC; and a low-frequency excitation functional unit module 4 in the middle and an amplifier AMP module 8 of high current of an output stage, wherein a level monitoring table 7 of a sound volume METER VU METER is arranged between the low-frequency excitation functional unit module in the middle and the amplifier AMP module 8 of high current of the output stage and is used for detecting an output signal value.

The output interface circuit of the embodiment utilizes the auditory psychology characteristic of people, additionally adds a low-frequency excitation functional unit circuit besides using a high-standard current type DAC, and adopts a high-current module at an output stage, so that a high-quality promotion effect can be obtained by using a high-resistance earphone or a low-sensitivity earphone.

Wherein the content of the first and second substances,

the current mode DAC is a current mode output, so I/V conversion 1 and a low pass filter LPF2 are needed, the main function is to convert the current signal into a voltage signal, amplify and then perform low pass filtering, and the sound quality can be obviously improved if a high-end operational amplifier is adopted. Different high-end operational amplifiers can be mixed to achieve different tone quality effects. And then the BUFFER 3 is connected, so that the current output capability is greatly enhanced, and a large earphone can be pushed.

The middle low-frequency excitation functional unit adopts a modular design, the low-frequency excitation functional unit module 4 comprises a frequency point correction FC ADJ button 5 and a subharmonic synthesizer adjusting button 6(subharmonic synthesizer adjusting button), and the frequency point correction FC ADJ button 5 and the subharmonic synthesizer adjusting button 6 form a middle timbre excitation processing unit module.

After the excitation unit is modularized, the excitation unit can be embedded into any audio system, and the integral timbre and listening feeling can be improved.

And a level monitoring table 7 of a sound volume VU METER is arranged between the low-frequency excitation functional unit module in the middle and the amplifier AMP module of the large current of the output stage and is used for detecting the value of an output signal.

The amplifier AMP module 8 of the output stage exists not only as an output form of the earphone, but also can be expanded into an amplification module unit of LINE and MIC, and good overall performance can be obtained.

The embodiment modifies and beautifies signals on the whole, improves tone quality and sound penetrating power to a considerable degree, increases sound field sense of sound, enables the sound to be more perfect and expressive, avoids the lack of infecting power of a common earphone output interface circuit on hearing sense, and can obtain excellent electrical indexes and excellent sound dyeing through adjustment.

The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, improvement, etc. made on the basis of the present invention should be included in the protection scope of the present invention.

Claims

1. A current type earphone amplifying circuit is characterized by comprising a current type digital-to-analog converter (DAC), a low-frequency excitation functional unit module and a high-current output stage, wherein the current type DAC is electrically connected with the low-frequency excitation functional unit module, and the low-frequency excitation functional unit module is electrically connected with the high-current output stage; wherein the content of the first and second substances,

the current-mode digital-to-analog converter DAC converts the digital audio signal into an analog audio signal;

the low-frequency excitation functional unit module carries out timbre excitation processing on the audio signal;

the large-current output stage outputs an analog audio signal.

2. A current-mode headphone amplifier circuit as in claim 1, wherein the low frequency excitation functional unit module comprises a frequency point correction, FC, ADJ, button.

3. A current-mode earphone amplification circuit as claimed in claim 2, wherein said low frequency excitation functional unit module further comprises a subharmonic synthesizer adjustment knob, and said frequency point correction FC ADJ knob and subharmonic synthesizer adjustment knob form a middle timbre excitation processing unit.

4. A current type earphone amplifying circuit according to claim 3, wherein an access I/V conversion circuit is arranged between the current type digital-to-analog converter DAC and the low frequency excitation functional unit module, and an input end of the access I/V conversion is connected with the current type digital-to-analog converter DAC.

5. A current mode headphone amplifier circuit as claimed in claim 4, wherein the output of the incoming I/V conversion is connected to a low pass filter LPF.

6. A current type earphone amplifying circuit according to claim 5, wherein the LPF is connected with a BUFFER BUFFER, and the BUFFER BUFFER is connected with the input end of the low frequency excitation functional unit module.

7. A current mode headphone amplifier circuit as in claims 1 or 5, wherein the high current output stage comprises an amplifier AMP module.

8. A current type earphone amplifying circuit according to claim 7, wherein a level monitoring table of a sound volume VU METER is arranged between the low frequency excitation function unit module and the amplifier AMP module for output signal value detection.

9. A current-mode headphone amplifier circuit as in claim 7, wherein the amplifier AMP module comprises an amplifier module unit of a LINE in port and/or a Mic in port.

10. A headset comprising a current mode headset amplifier circuit according to any of claims 1-9.