CN204948330U - Speaker circuit and mobile terminal - Google Patents
Speaker circuit and mobile terminal Download PDFInfo
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- CN204948330U CN204948330U CN201520723560.XU CN201520723560U CN204948330U CN 204948330 U CN204948330 U CN 204948330U CN 201520723560 U CN201520723560 U CN 201520723560U CN 204948330 U CN204948330 U CN 204948330U
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- filter
- mobile terminal
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- speaker
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Abstract
The utility model provides a kind of speaker circuit and mobile terminal, described loud speaker is used for mobile terminal, described speaker circuit comprises an audio chip and at least one loud speaker, described speaker circuit also comprises at least one first filter and at least one second filter, described audio chip comprises at least one source of sound pin, source of sound pin, the first filter, the second filter and loud speaker connect successively, and described first filter and the second filter include at least one inductance.The utility model improves the distortion of mobile terminal loud speaker by the improvement of hardware, the noise of the loud speaker effectively reduced, and improves audio, for user brings better experience.
Description
Technical field
The utility model relates to a kind of speaker circuit and mobile terminal.
Background technology
Mobile phone, as a kind of mobile terminal, for user provides huge facility, has become articles for use indispensable in people's daily life.The requirement of user to mobile phone is more and more higher, and particularly in audio, loud speaker is as the major function device of handset audio, and its audio performance quality directly has influence on the life-span of user's impression and device.
The loud speaker of mobile phone, by the restriction of hardware, cannot provide good tonequality, and loud speaker noise is large, and user cannot obtain the sound of high-quality from mobile phone at music power amplifier with when conversing hands-free.
Utility model content
The technical problems to be solved in the utility model is that loud speaker noise in order to overcome mobile terminal in prior art is large, cannot provide the defect of good tonequality, provides a kind of and reduces loudspeaker distortions, provides speaker circuit and the mobile terminal of more high tone quality.
The utility model solves above-mentioned technical problem by following technical proposals:
A kind of speaker circuit, for mobile terminal, described speaker circuit comprises an audio chip and at least one loud speaker, its feature is, described speaker circuit also comprises at least one first filter and at least one second filter, described audio chip comprises at least one source of sound pin, and source of sound pin, the first filter, the second filter and loud speaker connect successively, and described first filter and the second filter include at least one inductance.
The power amplifier that loud speaker is conventional drives AB class, D class or K class etc., because the power consumption of loud speaker is comparatively large, under battery capacity limited situation.In order to improve mobile phone longer service time, consider for operating efficiency aspect, the audio frequency power amplifiers such as normal D or K of employing class drive, and now have the high order harmonic component of switching noise.Because loud speaker has larger electric current and longer transmission line, switching noise will radiation and be coupled to antenna, thus has influence on the receiving sensitivity of communications portion.
The mobile phone of GSM (global system for mobile communications) standard, radio-frequency power amplifier will once signal transmission every 4.615ms (217Hz), can produce Burst (burst) electric current in gap and very strong electromagnetic radiation during signal transmission.The Burst electric current in gap can form the power-supply fluctuation of 217Hz; The high frequency radio signals of 900MHz and 1800MHz defines the radio frequency envelope signal of 217Hz.The power-supply fluctuation of 217Hz can by Conduction coupling in audio signal passage, and the radio frequency envelope signal of 217Hz can by radiation coupling in audio signal path.If protect bad, the TDDNoise (audio-frequency current sound) that can hear will be produced, which includes the harmonic noise signals of 217Hz noise and 217Hz.
Comprise two filters between the source of sound pin of the application and loud speaker, the filter effect near audio chip is noise suppressed; Filter effect near loud speaker is isolation movable signal.Two filters can play good protective action, the noise of the loud speaker effectively reduced, and improve audio, for user brings better experience.And the application utilizes inductance to replace magnetic resistance, to avoid the damage of magnetic resistance to tonequality and the abatement of volume.
Preferably, each source of sound pin and first filter, second filter are corresponding, and the inductance of the second filter that the inductance of the first filter that source of sound pin, source of sound pin are corresponding, source of sound pin are corresponding and loud speaker are connected successively.
Preferably, the quantity of source of sound pin, the first filter and the second filter is two, and described first filter and described second filter all also comprise an electric capacity.
Preferably, for each the first filter, the first end of the inductance of the first filter connects with corresponding source of sound pin, and the second end of the inductance of the first filter connects the first end of the first end of the electric capacity of described first filter and the inductance of the second filter respectively;
For each the second filter, the second end of the inductance of the second filter connects first end and the loud speaker of the electric capacity of the second filter.
Preferably, described speaker circuit also comprises a filter capacitor and two transient voltage suppressor, second end of each the second filter is also by a described transient voltage suppressor ground connection, and the second end of two the second filters is also connected by described filter capacitor.
The application also provides a kind of mobile terminal, and its feature is, described mobile terminal comprises speaker circuit as above.
Preferably, described mobile terminal is mobile phone or panel computer.
On the basis meeting this area general knowledge, above-mentioned each optimum condition, can combination in any, obtains each preferred embodiments of the utility model.
Positive progressive effect of the present utility model is: the utility model improves the distortion of mobile terminal loud speaker by the improvement of hardware, the noise of the loud speaker effectively reduced, and improves audio, for user brings better experience.
Accompanying drawing explanation
Fig. 1 is the structural representation of the speaker circuit of the utility model embodiment.
Embodiment
Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the utility model to be described.
Embodiment
See Fig. 1, the present embodiment provides a kind of mobile phone, and described mobile phone is the one of mobile terminal, and described mobile terminal can also be panel computer.Described mobile phone comprises a speaker circuit.
Described speaker circuit comprises an audio chip 11, two loud speakers 12, two the first filters 13, two second filter 14, filter capacitors 15 and two transient voltage suppressor 16, and described audio chip comprises two source of sound pins 111.Each source of sound pin 111 and first filter 13, second filter 14 is corresponding.
Wherein, the first filter refers to the filter near audio chip, and its effect is noise suppressed; Second filter refers to the filter near loud speaker, and its effect is isolation movable signal.Position relationship is source of sound pin, the first filter, the second filter and loud speaker connect successively.
Described first filter and the second filter include inductance 17 and an electric capacity 18, and in same filter, electric capacity one end connects described inductance, other end ground connection.
For each the first filter, the first end of the inductance of the first filter connects with corresponding source of sound pin, and the second end of the inductance of the first filter connects the first end of the first end of the electric capacity of described first filter and the inductance of the second filter respectively.
For each the second filter, the second end of the inductance of the second filter connects first end and the loud speaker of the electric capacity of the second filter.
Second end of each the second filter is also by a described transient voltage suppressor ground connection, and the second end of two the second filters is also connected by described filter capacitor.
Above-mentioned first end all refers to signal input part, and the second end is signal output part.
The present embodiment improves the distortion of mobile terminal loud speaker by the improvement of hardware, the noise of the loud speaker effectively reduced, and improves audio, for user brings better experience.
Although the foregoing describe embodiment of the present utility model, it will be understood by those of skill in the art that these only illustrate, protection range of the present utility model is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present utility model and essence, can make various changes or modifications to these execution modes, but these change and amendment all falls into protection range of the present utility model.
Claims (7)
1. a speaker circuit, for mobile terminal, described speaker circuit comprises an audio chip and at least one loud speaker, it is characterized in that, described speaker circuit also comprises at least one first filter and at least one second filter, described audio chip comprises at least one source of sound pin, and source of sound pin, the first filter, the second filter and loud speaker connect successively, and described first filter and the second filter include at least one inductance.
2. speaker circuit as claimed in claim 1, it is characterized in that, each source of sound pin and first filter, second filter are corresponding, and the inductance of the second filter that the inductance of the first filter that source of sound pin, source of sound pin are corresponding, source of sound pin are corresponding and loud speaker are connected successively.
3. speaker circuit as claimed in claim 2, it is characterized in that, the quantity of source of sound pin, the first filter and the second filter is two, and described first filter and described second filter all also comprise an electric capacity.
4. speaker circuit as claimed in claim 3, it is characterized in that, for each the first filter, the first end of the inductance of the first filter connects with corresponding source of sound pin, and the second end of the inductance of the first filter connects the first end of the first end of the electric capacity of described first filter and the inductance of the second filter respectively;
For each the second filter, the second end of the inductance of the second filter connects first end and the loud speaker of the electric capacity of the second filter.
5. speaker circuit as claimed in claim 4, it is characterized in that, described speaker circuit also comprises a filter capacitor and two transient voltage suppressor, second end of each the second filter is also by a described transient voltage suppressor ground connection, and the second end of two the second filters is also connected by described filter capacitor.
6. a mobile terminal, is characterized in that, described mobile terminal comprises as the speaker circuit in claim 1 to 5 as described in any one.
7. mobile terminal as claimed in claim 6, it is characterized in that, described mobile terminal is mobile phone or panel computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723560.XU CN204948330U (en) | 2015-09-18 | 2015-09-18 | Speaker circuit and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520723560.XU CN204948330U (en) | 2015-09-18 | 2015-09-18 | Speaker circuit and mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204948330U true CN204948330U (en) | 2016-01-06 |
Family
ID=55015715
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520723560.XU Expired - Fee Related CN204948330U (en) | 2015-09-18 | 2015-09-18 | Speaker circuit and mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204948330U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385717A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Audio output circuit and mobile terminal |
-
2015
- 2015-09-18 CN CN201520723560.XU patent/CN204948330U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111385717A (en) * | 2018-12-29 | 2020-07-07 | 比亚迪股份有限公司 | Audio output circuit and mobile terminal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 201703 Qingpu District, Shanghai, Shanghai Green Ping Road, No. 3938 Patentee after: Rui garshin Group Co. Ltd. Address before: 201799 Pudong New Area, Shanghai, Shanghai Green Ping Road, No. 3938 Patentee before: Emobile Comm (Shanghai) Inc. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 Termination date: 20200918 |