CN201178491Y - Micro loudspeaker apparatus integrating filter circuit and power regulation circuit - Google Patents
Micro loudspeaker apparatus integrating filter circuit and power regulation circuit Download PDFInfo
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- CN201178491Y CN201178491Y CNU2008200052218U CN200820005221U CN201178491Y CN 201178491 Y CN201178491 Y CN 201178491Y CN U2008200052218 U CNU2008200052218 U CN U2008200052218U CN 200820005221 U CN200820005221 U CN 200820005221U CN 201178491 Y CN201178491 Y CN 201178491Y
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Abstract
The utility model provides a miniature loudspeaking device which integrates the filter circuit and the power regulation circuit. The miniature loudspeaking device mainly allows the filter circuit to filter the interference noise of the voice input signals so as to acquire the signals of the specific frequency band, and allows the power regulation circuit to regulate the power of the voice output signals; in addition to the function of the interference noise filtration, the filter circuit can further be designed based on the characteristics of the hearing range of human ears, so that the voice signals input into the loudspeaker can be efficiently converted into the signals within the hearing range of the human ears; and the optimal amplification/attenuation factor of the power regulation circuit can be designed based on the maximum power of the output signal and the acceptable power of the loudspeaker, thereby preventing the damage to the loudspeaker caused by higher power of the input signals than the acceptable power of the loudspeaker. Accordingly, the performance of the miniature loudspeaking device can be effectively improved and the higher reliability can also be ensured.
Description
Technical field
The utility model relates to a kind of miniature loudspeaker arrangement, relates in particular to the miniature loudspeaker arrangement of a kind of integration kalman filter circuit and power adjusting circuit.
Background technology
Along with the progress and human lifting for the quality of life demand of science and technology, the product of subsidiary acoustic function spreads all over electronic product in life gradually.And wherein the device of voice output can be called loud speaker.Loud speaker be a kind of electric energy transfer to mechanical oscillation again the disturbance air become sound " transducer ", electronic product can send various sound by loud speaker, to satisfy the demand on the human auditory, the electronic installation of general common use loud speaker such as phone, sound equipment, walkman and buzzer .. or the like.
On the other hand, portably use for convenience, the design of electronic product size is more and more little, relatedly makes the loud speaker as voice output also must be more and more little, so miniature loudspeaker arrangement arises at the historic moment.Miniature loudspeaker arrangement is the minimum sound-producing device of a kind of volume, normally below 10 cubic centimeters, even below 5 cubic centimeters.
Present miniature loudspeaker arrangement on the market, function with the intact sound of transform electric is only arranged, quality quality as for output sound, finish by the electronic installation that is connected in miniature loudspeaker arrangement front end and decide, that is to say no matter be which type of electric signal is imported miniature loudspeaker arrangement, miniature loudspeaker arrangement just must be sound and output with this transform electric, so exists following shortcoming to need to improve.
Electric signal can be followed noise or interference signal usually; the transform electric that miniature loudspeaker arrangement will have a noise is sound and has distortion phenomenon when exporting and produce; the feasible mankind can't hear sound correct and that make us feeling comfortably cool smoothly, even do not understand output sound connotation to be expressed fully.
In addition and since human ear's auditory frequency range be 20Hz between the 20000Hz, have gap slightly according to different age, mood, individual physique differences.If electric signal that miniature loudspeaker arrangement received surpasses this frequency range, with the voice output people ear of this conversion of signals and can't receive.
Usually settling mode is to install a filter additional in the loud speaker front end, and more common filter kind has four kinds: low pass filter, can make the signal that is lower than characteristic frequency by and this signal more than frequency of decaying; High pass filter, can make the signal that is higher than characteristic frequency by and this signal below frequency of decaying; Band pass filter can make the signal of special frequency channel pass through and the outer signal of decay frequency range; Band is refused filter, and the signal of the special frequency channel that can decay also passes through the outer signal of frequency range.
The auditory properties that cooperates people's ear, that often uses refuses filter as band pass filter and band.Band pass filter can be limited in frequency input signal in the receivable scope of people's ear, band is refused the noise that filter then can be eliminated characteristic frequency, the device of right loud speaker front end not necessarily can dispose this filter, so can cause the non-constant of operational effectiveness of loud speaker.
Another problem, the input signal power that miniature loudspeaker arrangement itself can bear has certain limit, when the electronic installation of miniature loudspeaker arrangement front end is imported miniature loudspeaker arrangement with the electric signal of excessive power, promptly may influence miniature loudspeaker arrangement running or cause its damage, when the electronic installation of miniature loudspeaker arrangement front end will be crossed low power electric signal and import miniature loudspeaker arrangement, its intensity of sound of changing out is too little, may make people's ear can not hear clearly or even can't hear fully.
In sum, how a kind of high-performance is provided and has miniature loudspeaker arrangement concurrently, become the problem that needs to be resolved hurrily at present then than high-reliability.
Summary of the invention
For solving the disappearance of aforementioned prior art, the utility model provides the miniature loudspeaker arrangement of a kind of integration kalman filter circuit and power adjusting circuit, it is integrated in a miniature loudspeaker arrangement with filter circuit and power adjusting circuit, make audio input signal to filter the special frequency channel signal of interference noise, and utilize power adjusting circuit to adjust the power of voice output signal by filter circuit with acquisition people ear sense of hearing scope.
The miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit comprises: the signal filtering module, carry out filtering in order to voice signal to reception, and the voice signal of output characteristic frequency; Power regulation module is carried out power amplification or decay in order to the voice signal to this characteristic frequency; And loudspeaker module, in order to the voice signal output that will amplify or decay, wherein, the volume of the miniature loudspeaker arrangement of this integration kalman filter circuit and power adjusting circuit is below 10 cubic centimeters.
Compared to existing miniature loudspeaker arrangement, the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit, can filter interference noise by the signal filtering module, and according to the signal of the different demands of user with the acquisition special frequency channel, or make the signal filtering modular design according to people's ear sense of hearing ranges of characteristics, make in the efficient conversion adult of the voice signal ear sense of hearing scope of input loud speaker.Utilize power adjusting circuit to adjust the power of voice output signal again.The power that power adjusting circuit can bear according to the power and the loud speaker of different device spiking output, designing optimal amplification multiplying power, the power that can prevent input signal is higher than the power that loud speaker can bear and causes loud speaker to damage, and power is remained in the perceptible scope of human auditory.In view of the above, can effectively promote the performance of miniature loudspeaker arrangement and have higher reliability concurrently.
Below in conjunction with the drawings and specific embodiments the utility model is described in detail, but not as to qualification of the present utility model.
Description of drawings
Fig. 1 is the device architecture figure of an embodiment of the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit;
Fig. 2 is the device architecture figure that the miniature loudspeaker arrangement that is shown in Fig. 1 comprises another embodiment of rf filtering module;
Fig. 3 is the device architecture figure that the miniature loudspeaker arrangement that is shown in Fig. 2 comprises the another embodiment of power supply handover module; And
Fig. 4 is integrated in the concrete enforcement circuit diagram of a circuit board for miniature loudspeaker arrangement of the present utility model.
Wherein, Reference numeral
The miniature loudspeaker arrangement of 1 integration kalman filter circuit and power adjusting circuit
11 signal filtering modules
12 power regulation module
13 loudspeaker modules
14 rf filtering modules
15 power supply handover modules
2 circuit boards
20 operational amplifier chips
21 winding displacements
22 loud speakers
R1, R2, R3, R4 resistance
C1, C2, C3, C4, C5, C6, C7 electric capacity
L1, the L2 inductance
Embodiment
Below by particular specific embodiment execution mode of the present utility model is described, person skilled in the art scholar can understand other advantage of the present utility model and effect easily by the content that this specification disclosed.The utility model also can be implemented or be used by other different specific embodiment, and the every details in this specification also can be carried out various modifications and change based on different viewpoints and application under not departing from spirit of the present utility model.
See also Fig. 1, it is in order to the device architecture figure of the miniature loudspeaker arrangement that shows integration kalman filter circuit of the present utility model and power adjusting circuit.As shown in Figure 1, the miniature loudspeaker arrangement 1 of integration kalman filter circuit of the present utility model and power adjusting circuit comprises signal filtering module 11, power regulation module 12 and loudspeaker module 13.
In present embodiment, the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit can be applicable to have in the mobile phone of music playback function, when the music playing module of mobile phone or processing unit are sent to signal filtering module 11 with voice signal (being a band pass filter) herein, can voice signal be limited in the acceptable frequency range of people's ear by signal filtering module 11, carry out power amplification or decay with power regulation module 12 again, if the rated power scope that input power can have been born greater than loudspeaker module 13, i.e. decay exports the power of loudspeaker module 13 to, to avoid damaging loudspeaker module 13, if input power is too little can't to drive loudspeaker module 13, then amplifying power makes loudspeaker module 13 energy output sounds.The miniature loudspeaker arrangement volume that comprises the integration kalman filter circuit of above-mentioned module and power adjusting circuit is in below 10 cubic centimeters.More preferably in below 5 cubic centimeters.
See also Fig. 2, in a preferred embodiment of the present utility model, the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit comprises rf filtering module 14 again, and it is in order to decay or eliminate the Radio Frequency Interfere that is coupled in voice signal.Rf filtering module 14 is connected between power regulation module 12 and the loudspeaker module 13, when voice signal is subjected to the radiofrequency signal interference, rf filtering module 14 can decay or even eliminate radiofrequency signal and disturb, not influenced by radiofrequency signal.
See also Fig. 3, in of the present utility model one better embodiment, the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit also comprises power supply handover module 15, and it is in order to supply according to power control signal On/Off power supply.When power supply handover module 15 power-on are supplied, needed electric energy is to carry out voice output in the time of making whole miniature loudspeaker arrangement obtain running, when power supply handover module 15 powered-downs were supplied, miniature loudspeaker arrangement stopped action (stopping output sound) because of obtaining to operate required electric energy.An advantage of this kind operator scheme is to stop that some does not wish voice signal output that people's ear is heard.For instance; mobile phone may cause signal surging or interference because of carrying out some function (as power-on) as the aforementioned; this moment, the sound of loud speaker output can make people's ear feel under the weather usually; yet by power supply handover module 15 powered-downs miniature loudspeaker arrangement is decommissioned, can completely cut off the output of this type of sound.Another advantage is when mobile phone does not use sound output function, also can close the power supply that is supplied to miniature loudspeaker arrangement by power supply handover module 15, and power-on supply again when waiting to need voice output so can effectively be saved power wastage.Except that being applied in mobile phone, also can be applicable to other portable electronic apparatus such as mobile computer, walkman etc., can improve its stand-by time.
See also Fig. 4, it is the concrete enforcement circuit diagram that miniature loudspeaker arrangement of the present utility model is integrated in a circuit board, and as shown in Figure 4, signal filtering module 11, power regulation module 12, rf filtering module 14 are integrated in circuit board 2 with the power supply handover module.Right in above-mentioned signal filtering module 11, power regulation module 12 is beyond the power supply handover module 15, in other embodiments also can be with signal filtering module 11, power regulation module 12, loudspeaker module 13, rf filtering module 14 and/or power supply handover module 15 are integrated in circuit board 2.
Comprise in the circuit board 2 that (L1 L2), is integrated into a device with bandpass filtering function, power amplification function, rf filtering function and power supply handoff functionality for operational amplifier chip 20, resistance (R1-R4), electric capacity (C1-C5) and inductance.Power supply inputs to this circuit board 2 by winding displacement 21, can supply with the running of whole miniature loudspeaker arrangement.GND (TP5) is an earth terminal, uses as the ground connection of whole miniature each assembly of loudspeaker arrangement.SHUTDOWN (TP2) is the input of power control signal, and operational amplifier chip 20 can begin or stop the amplifier running according to the different electrical power control signal, to reach the function that above-mentioned power supply switches.AUDIO IN+ (TP3) and AUDIO IN-(TP4) are the voice signal input of two opposite phases, and by the processing of circuit board 2, exportable splendid sound is described in detail as follows.
The circuit of circuit board 2 is made up of operational amplifier chip 20, resistance R 1～R4, capacitor C 1～C5 and inductance L 1, L2.In addition, capacitor C 7 is used for providing the effect of DC voltage-stabilizing as the shunt capacitance of operational amplifier chip 20 when 20 work of operational amplifier chip.Capacitor C 6 is connected between power supply input and the earth terminal, is used to provide the effect of input power filter.
The logical frequency of band and the power gain that are predetermined according to the user design the RC circuit (by C1, C2, C3, C4, R1, R2, R3, R4 forms), the sound source signal that phase place is opposite (AUDIO IN+, AUDIO IN-) carry out bandpass filtering and adjust power gain by winding displacement 21 input operational amplifier chips 20 cooperation RC circuit, accept the sound of scope even the output of cooperation human hearing characteristic optimization in order to voice signal is adjusted to people's ear, and amplification or deamplification power output raising loud speaker service efficiency and reliability.
For instance, when the user scheduled the predeterminated frequency wave band between the F1 to F2 according to human hearing characteristic, band pass filter can make the last sound of importing have only the signal of this F1 to F2 frequency range the decay of the frequency beyond this F1 to F2.Certainly the signal of this frequency range between human ear's auditory frequency range 20Hz between the 20kHz.When the maximum of supposing loud speaker is again born power and is P1,, just it must be decayed to avoid loud speaker to burn when the voice signal power of the miniature loudspeaker arrangement of input during greater than P1.
In sum, the miniature loudspeaker arrangement of integration kalman filter circuit of the present utility model and power adjusting circuit, can filter interference noise by the signal filtering module, and according to the signal of the different demands of user with the acquisition special frequency channel, or comply with pleasant sense of hearing ranges of characteristics and make the signal filtering modular design, make in the efficient conversion adult of the voice signal ear sense of hearing scope of input loud speaker.Utilize power adjusting circuit to adjust the power of voice output signal again.The power that power adjusting circuit can bear according to the power and the loud speaker of different device spiking output, designing optimal amplification multiplying power, the power that can prevent input signal is higher than the power that loud speaker can bear and causes loud speaker to damage, and power is remained in the perceptible scope of human auditory.In view of the above, can effectively promote the performance of miniature loudspeaker arrangement and have higher reliability concurrently.
Certainly; the utility model also can have other various embodiments; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (13)
1, the miniature loudspeaker arrangement of a kind of integration kalman filter circuit and power adjusting circuit is characterized in that, comprising:
The signal filtering module is carried out filtering in order to the voice signal to input, and the voice signal of output characteristic frequency;
Power regulation module is carried out power amplification or decay in order to the voice signal to this characteristic frequency; And
Loudspeaker module, in order to will be through amplifying or this voice signal output of decay,
Wherein, this power regulation module amplification or decay power are in the rated power scope of this loudspeaker module.
2, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, this signal filtering module is a low pass filter.
3, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, this signal filtering module is a high pass filter.
4, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, this signal filtering module is a band pass filter.
5, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, this signal filtering module is refused filter for band.
6, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, this loudspeaker module is made up of several loud speakers.
7, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 6 and power adjusting circuit, it is characterized in that, use winding displacement, twisted wire, single-core line, split conductor, soft printed circuit board (PCB), hard printed circuit board, attachment plug or IC regime to interconnect between these several loud speakers.
8, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, also comprises a rf filtering module, is coupled in the Radio Frequency Interfere of this voice signal in order to decay or elimination.
9, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, also comprises a power supply handover module, supplies in order to the On/Off power supply according to power control signal.
10, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 9 and power adjusting circuit, it is characterized in that this signal filtering module, this power regulation module, this loudspeaker module, this rf filtering module and/or this power supply handover module are integrated on the circuit board.
11, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 10 and power adjusting circuit is characterized in that, this circuit board is hard printed circuit board, soft printed circuit board (PCB) or surface-mounted integrated circuit.
12, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 10 and power adjusting circuit, it is characterized in that, this circuit board is by winding displacement, flexible circuit board or attachment plug, to receive this voice signal, this power supply input signal and/or this power control signal.
13, the miniature loudspeaker arrangement of integration kalman filter circuit according to claim 1 and power adjusting circuit is characterized in that, the volume of the miniature loudspeaker arrangement of this integration kalman filter circuit and this power adjusting circuit is below 10 cubic centimeters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200052218U CN201178491Y (en) | 2008-03-18 | 2008-03-18 | Micro loudspeaker apparatus integrating filter circuit and power regulation circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200052218U CN201178491Y (en) | 2008-03-18 | 2008-03-18 | Micro loudspeaker apparatus integrating filter circuit and power regulation circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201178491Y true CN201178491Y (en) | 2009-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200052218U Expired - Fee Related CN201178491Y (en) | 2008-03-18 | 2008-03-18 | Micro loudspeaker apparatus integrating filter circuit and power regulation circuit |
Country Status (1)
| Country | Link |
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| CN (1) | CN201178491Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820563A (en) * | 2010-04-06 | 2010-09-01 | 瑞声声学科技(深圳)有限公司 | Speaker protection system |
| CN110729281A (en) * | 2019-11-11 | 2020-01-24 | 中国电子科技集团公司第五十五研究所 | Broadband high-power GaN pre-matching power tube |
-
2008
- 2008-03-18 CN CNU2008200052218U patent/CN201178491Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101820563A (en) * | 2010-04-06 | 2010-09-01 | 瑞声声学科技(深圳)有限公司 | Speaker protection system |
| CN101820563B (en) * | 2010-04-06 | 2014-01-29 | 瑞声声学科技(深圳)有限公司 | Speaker protection system |
| CN110729281A (en) * | 2019-11-11 | 2020-01-24 | 中国电子科技集团公司第五十五研究所 | Broadband high-power GaN pre-matching power tube |
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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: 20090107 Termination date: 20110318 |