CN201426171Y - Low-frequency booster - Google Patents
Low-frequency booster Download PDFInfo
- Publication number
- CN201426171Y CN201426171Y CN2009201305020U CN200920130502U CN201426171Y CN 201426171 Y CN201426171 Y CN 201426171Y CN 2009201305020 U CN2009201305020 U CN 2009201305020U CN 200920130502 U CN200920130502 U CN 200920130502U CN 201426171 Y CN201426171 Y CN 201426171Y
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- circuit
- low
- decibel
- frequency
- right wing
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Abstract
The utility model relates to a low-frequency booster, which particularly comprises a boost selector arranged at the back of an audio frequency signal input interface. The low-frequency booster furthercomprises a left low-pass circuit and a left decibel-boost circuit, a right low-pass circuit and a right decibel-boost circuit, as well as an audio frequency output interface,wherein an input end ofthe left low-pass circuit is electrically connected with the boost selector and an output end of the left low-pass circuit is connected with the left decibel-boost circuit, an input end of the right low-pass circuit is electrically connected with the boost selector and the input end of the right low-pass circuit is connected with the right decibel-boost circuit, and the audio output interface is connected with the output ends of the left decibel-boost circuit, the right decibel-boost circuit and the boost selector. The low-frequency booster obtains power from a button battery and has the advantages of long service time, convenient battery replacement, volume reduction, and the like.
Description
Technical field
The utility model relates to a kind of power amplifier, especially relates to a kind of low-frequency boosters exportable and that can strengthen hanging down sound function by low frequency lifting that has.
Background technology
Along with development of electronic technology and progress, various music players or have the equipment of audio-video playing function, progressively enter in the daily life as various electronic products such as CD player, MP3, MP4 and mobile phones, and constantly popularized, and in the above electronic product, earphone is absolutely necessary as a kind of accessory.
With regard to earphone, other sound play devices such as its audition mode and audio amplifier are that certain difference is arranged.Earphone is to just there being its distinctive mode above the equilibrium of sound.The high frequency of earphone generally all will promote to some extent, gives like this that details is abundant, the sensation of sound balance.
And the low frequency hypomere (between the 40Hz-20Hz) of earphone and ultralow frequency (20Hz is following) are to need to pass through the health perception, and people's ear is insensitive to these frequency ranges.Earphone this low frequency of can perfectly resetting, but because health can't be felt low frequency can allow the people feel the low frequency deficiency of earphone.Low frequency fully smooth earphone tends to allow the people feel the low frequency deficiency, and sound is not mellow and full.
But for the consideration to earphone application target and practicality aspect, the volume of earphone is generally smaller, thereby the vibrating diaphragm area also is smaller, the dull low frequency of can't resetting out, and this just needs suitably to promote the low frequency of earphone, can make the sound of earphone seem plentiful like this, low frequency is dark to dive.
Yet with regard to the earphone of prior art, although the person skilled of this area has been made the various improvement that promote ear-phone function, improve aspects such as earphone quality that have to earphone, certain contribution has been made in technological progress to earphone.But, by retrieval, find no the improvement that earphone low frequency lifting aspect is made.
Summary of the invention
In view of the above-mentioned problems in the prior art, the purpose of this utility model provides a kind ofly not only to be had and the bass in the music player can be carried out the electronics frequency-selecting, and its bass is promoted, and improves tonequality; And it is powered by button cell, has the low-frequency boosters that is applicable to earphone earplug that service time is long, be convenient to advantages such as battery altering and reduced volume.
For reaching above-mentioned purpose of the present utility model, the utility model provides a kind of low-frequency boosters, comprising:
One promotes selector, and described lifting selector is arranged at after the audio input interface;
One left road low pass circuit and left road decibel promote circuit, and the input of described left road low pass circuit and described lifting selector form and electrically connect, and the output of described left road low pass circuit connects left road decibel and promotes circuit;
One right wing low pass circuit and right wing decibel promote circuit, and the input of described right wing low pass circuit and described lifting selector form and electrically connect, and the output of described right wing low pass circuit connects the right wing decibel and promotes circuit;
One audio output interface, described audio output interface connect the output that left road decibel promotes circuit and right wing decibel lifting circuit, and connect the lifting selector.
Low-frequency boosters of the present utility model also comprises one for left road decibel promotes circuit, the right wing decibel promotes the battery that circuit provides electric energy.
When preferred forms, described battery is the 3V button cell.
Low-frequency boosters of the present utility model is when preferred forms, and the predetermined decibel value of low frequency lifting that described left road decibel promotes circuit and right wing decibel lifting circuit is 7db.In other execution modes, the predetermined decibel value of low frequency lifting can be higher or lower than 7db.
When preferred forms, the frequency of gating voice signal is the 20Hz-500Hz voice signal among the 20Hz-20KHz in described left road low pass circuit and the right wing low pass circuit.At other execution modes, can be a little higher than or be lower than 500Hz.
When preferred forms, the operational amplifier in the described power amplification circuit is the low pass operational amplifier.For example described operational amplifier chip model is TPA751.
Described audio input interface comprises a common pin and holding wire, and described holding wire one end is connected with the input of described lifting selector, and an end is connected to described common pin.
Advantage of the present utility model and beneficial effect are, have overcome the deficiencies in the prior art, have the bass in the music player to be carried out the electronics frequency-selecting, and its bass is promoted, and improve tonequality; And it is powered by button cell, has length service time, is convenient to advantages such as battery altering and reduced volume.
Description of drawings
Fig. 1 is the structural principle block diagram of the utility model low-frequency boosters;
Fig. 2 is a low-frequency boosters electrical schematic diagram of the present utility model.
Embodiment
In order to further specify principle of the present utility model and structure, now in conjunction with the accompanying drawings preferred embodiment of the present utility model is elaborated, yet the described embodiment usefulness for furnishing an explanation and explaining only can not be used for limiting scope of patent protection of the present utility model.
A kind of low-frequency boosters as depicted in figs. 1 and 2 comprises: one promotes selector 30, and described lifting selector 30 is arranged at after the audio input interface;
One left road low pass circuit 11 and left road decibel promote circuit 12, and the input of described left road low pass circuit 11 and described lifting selector 30 form and electrically connect, and the output of described left road low pass circuit 11 connects left road decibel and promotes circuit 12;
Best, lifting selector 30 shown in Figure 2 is toggle switches, Yi Bian be to promote bass, Yi Bian be not promote, is selected by the user.
One right wing low pass circuit 21 and right wing decibel promote circuit 22, and the input of described right wing low pass circuit 21 and described lifting selector 30 form and electrically connect, and the output of described right wing low pass circuit 21 connects the right wing decibel and promotes circuit 22;
Best, identical with left road, lifting selector 30 shown in Figure 2 is toggle switches, Yi Bian be to promote bass, Yi Bian be not promote, is selected by the user.Promoting selector 30 is dpdt double-pole double-throw (DPDT).
One audio output interface 40, described audio output interface 40 connects the output that left road decibel promotes circuit 12 and right wing decibel lifting circuit 22, and connects lifting selector 30.
Low-frequency boosters of the present utility model also comprises one for left road decibel promotes circuit 12, the right wing decibel promotes the battery that circuit 22 provides electric energy.
When preferred forms, described battery is the 3V button cell.
As shown in Figure 2, low-frequency boosters of the present utility model is when preferred forms, and the predetermined decibel value of low frequency lifting that described left road decibel promotes circuit 12 and right wing decibel lifting circuit 22 is 7db.Realize the numerical value decision of this index by resistance capacitance in the circuit, these belong to prior art, do not give unnecessary details for this reason.
In other execution modes, the predetermined decibel value of low frequency lifting can be higher or lower than 7db.
When preferred forms, the frequency of gating voice signal is the 20Hz-500Hz voice signal among the 20Hz-20KHz in described left road low pass circuit 11 and the right wing low pass circuit 21.
This index is by the numerical value decision of resistance capacitance in the circuit, and these belong to prior art, do not give unnecessary details for this reason.
Other execution modes, the upper limit of low frequency signal can be a little higher than or be lower than 500Hz.
When preferred forms, the operational amplifier in the described power amplification circuit is the low pass operational amplifier.For example described operational amplifier chip model is TPA751.
Certainly, there are various operational amplifier chip models to use in the prior art, do not enumerate one by one at this.
Described audio input interface comprises a common pin and holding wire, and described holding wire one end is connected with the input of described lifting selector, and an end is connected to described common pin
Advantage of the present utility model and beneficial effect are, have overcome the deficiencies in the prior art, have the bass in the music player to be carried out the electronics frequency-selecting, and its bass is promoted, and improve tonequality; And it is powered by button cell, has length service time, is convenient to advantages such as battery altering and reduced volume.
Above content be in conjunction with concrete preferred implementation to further describing that the utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For the utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from the utility model design, can also make some simple deduction or replace, all should be considered as belonging to protection range of the present utility model.
Claims (8)
1. low-frequency boosters, it is characterized in that: described low-frequency boosters comprises:
One promotes selector, and described lifting selector is arranged at after the audio input interface;
One left road low pass circuit and left road decibel promote circuit, and the input of described left road low pass circuit and described lifting selector form and electrically connect, and the output of described left road low pass circuit connects left road decibel and promotes circuit;
One right wing low pass circuit and right wing decibel promote circuit, and the input of described right wing low pass circuit and described lifting selector form and electrically connect, and the output of described right wing low pass circuit connects the right wing decibel and promotes circuit;
One audio output interface, described audio output interface connect the output that left road decibel promotes circuit and right wing decibel lifting circuit, and connect the lifting selector.
2. low-frequency boosters as claimed in claim 1 is characterized in that: also comprise one for left road decibel promotes circuit, the right wing decibel promotes the battery that circuit provides electric energy.
3. low-frequency boosters as claimed in claim 2 is characterized in that: described battery is the 3V button cell.
4. low-frequency boosters as claimed in claim 1 is characterized in that: the predetermined decibel value of low frequency lifting that described left road decibel promotes circuit and right wing decibel lifting circuit is 7db.
5. low-frequency boosters as claimed in claim 1 is characterized in that: the frequency of gating voice signal is the 20Hz-500Hz voice signal among the 20Hz-20KHz in described left road low pass circuit and the right wing low pass circuit.
6. low-frequency boosters as claimed in claim 1 is characterized in that: the operational amplifier in the described power amplification circuit is the low pass operational amplifier.
7. low-frequency boosters as claimed in claim 6 is characterized in that: described operational amplifier chip model is TPA751.
8. low frequency lifting earphone as claimed in claim 1 is characterized in that:
Described audio input interface comprises a common pin and holding wire, and described holding wire one end is connected with the input of described lifting selector, and an end is connected to described common pin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201305020U CN201426171Y (en) | 2009-04-03 | 2009-04-03 | Low-frequency booster |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201305020U CN201426171Y (en) | 2009-04-03 | 2009-04-03 | Low-frequency booster |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201426171Y true CN201426171Y (en) | 2010-03-17 |
Family
ID=42025628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201305020U Expired - Fee Related CN201426171Y (en) | 2009-04-03 | 2009-04-03 | Low-frequency booster |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201426171Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105530568A (en) * | 2016-01-26 | 2016-04-27 | 东莞市逸顺音响科技有限公司 | High pitch riser conversion head and high pitch rising method |
-
2009
- 2009-04-03 CN CN2009201305020U patent/CN201426171Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105530568A (en) * | 2016-01-26 | 2016-04-27 | 东莞市逸顺音响科技有限公司 | High pitch riser conversion head and high pitch rising method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100317 Termination date: 20110403 |