CN102026076A - Solar electret transducer and low-energy consumption electret transducer - Google Patents
Solar electret transducer and low-energy consumption electret transducer Download PDFInfo
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- CN102026076A CN102026076A CN2009101729573A CN200910172957A CN102026076A CN 102026076 A CN102026076 A CN 102026076A CN 2009101729573 A CN2009101729573 A CN 2009101729573A CN 200910172957 A CN200910172957 A CN 200910172957A CN 102026076 A CN102026076 A CN 102026076A
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- solar energy
- audio signal
- electret
- electret transducer
- transducer
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Abstract
The invention provides a solar electret transducer and a low-energy consumption electret transducer. The solar electret transducer comprises a solar power supply module, an amplifying circuit and an electret loudspeaker, wherein the amplifying circuit is provided with a first input end coupled to the solar power supply module and a second input end couple to an audio signal input end; the amplifying circuit receives a first voltage level through the first input end and boosts to a second voltage level through the first voltage level, and the amplifying circuit receives a first audio signal through the second input end and converts the first audio signal into an amplified second audio signal; and the electret loudspeaker is coupled to the output end of the amplifying circuit so as to receive the second audio signal and outputs a sound corresponding to the second audio signal. The invention does not need to combine a charging circuit and an energy storage battery additionally, meets the environmentally-friendly requirement and has high added value.
Description
Technical field
The present invention relates to a kind of electret transducer, particularly a kind of with solar energy as the electret transducer of supply of electric power and a kind of electret transducer of low power consuming.
Background technology
The electroacoustic loud speaker is a kind of transducer (Transducer) that converts electrical energy into acoustic energy output, can be divided into three kinds of moving-coil type, piezoelectric type and electrostatic transducers according to its type of drive.
At present extensive with the use of moving-coil type transducer, it has been widely used in products such as TV, sound equipment, earphone and mobile phone; Yet the moving-coil type transducer is limited because of the design of its inherent structure and electric energy, can't meet portability and the low current demand of people for electronic product.As for conventional electrostatic formula transducer then because of the amplifier of the high Dc biases of needs (1500V to 2000V), its application that is unfavorable for portable product with high costs.Therefore, the electroacoustic transducer that needs a kind of power saving of development, frivolous, transparent, high regeneration quality.
Electret transducer can be soft and be called soft loud speaker because of possessing, advantage such as it has, and volume is frivolous, high efficiency, high frequency range and low distortion; With regard to the consideration of small product size and efficient, the application potential of the dark tool portable product of electret transducer.
On the other hand, when design Portable 3C Product, except that the consideration of the volume of product own, the supply of electric power source also is considerable subject under discussion.Particularly, as shown in Figure 1, in the amplifier circuit 10 of traditional transducers, be to sound intensifier 12 supplies one direct current power supply 14, by it voice signal being boosted produces sound with the film movement that promotes loud speaker 16.
At present environmental protection, continuous energy source are forever all done one's utmost to seek by all circles, with solar cell as the technology in supply of electric power source also thereby flourish; Solar energy not only belongs to regenerative resource, also possesses the potentiality that are applied to portable product.See also Fig. 2, it has illustrated the amplifying circuit 20 that utilizes solar cell to drive the sound intensifier of traditional transducers as DC power supply; Though its design drives sound intensifier 22 with solar cell 24, yet because of the sound intensifier 22 of traditional transducers needs high Dc bias, so solar cell 24 still must be in conjunction with a charging circuit and energy-storage battery 25, utilize charging circuit that energy-storage battery 25 is charged, and then provide electric power so that voice signal is boosted to sound intensifier 22, enable to promote the film movement of loud speaker 26 and produce sound.
As shown in the above description, use the solar energy all must the combined charge circuit as the existing system of power source and the energy-storage battery energy storage of charging at present, also do not have a kind of transducer that does not need storing electrical energy to use.
Summary of the invention
Main purpose of the present invention is for a kind of solar energy electret transducer and low power consuming electret transducer are provided, and is that the system of power source must the combined charge circuit and the charge problem of energy storage of energy-storage battery with solar energy to solve existing.
For achieving the above object, the embodiment of the invention provides a kind of solar energy electret transducer, and it comprises: a solar energy power supply assembly; One amplifying circuit, it has a first input end that couples with described solar energy power supply assembly and one second input that couples with an audio signal input end, this amplifying circuit receives one first voltage level by this first input end, and this first voltage level boosted to one second voltage level, and this amplifying circuit receives one first audio signal by this second input, and this first audio signal is converted to second audio signal of amplifying; And an electret speakers, its output that is coupled to this amplifying circuit is receiving this second audio signal, and an output sound corresponding with this second audio signal.
According to present embodiment, described solar energy power supply assembly be a chip-shaped solar cell, a thin film solar cell and an organic material type solar cell one of them.
According to present embodiment, the size of described solar energy power supply assembly is between 20mm * 20mm to 500mm * 500mm.
According to present embodiment, the voltage level that described solar energy power supply assembly is provided is between between the 0.03V to 20V.
According to present embodiment, the voltage level that described solar energy power supply assembly is provided is between between the 2V to 10V.
According to present embodiment, the voltage of described first audio signal is between between the 50mVAC to 2VAC.
According to present embodiment, the alternating current of described solar energy power supply assembly is between between the 10mA to 200mA.
According to present embodiment, described amplifying circuit is a booster circuit, is used to promote the voltage of described first voltage level and is converted to one second voltage level; And an audio-frequency power amplifier, be used to amplify described first audio signal and be converted to second audio signal of amplifying.
According to present embodiment, described audio-frequency power amplifier is: a category-A audio-frequency power amplifier, a category-B audio-frequency power amplifier, a C genus audio power amplifier, a D genus audio power amplifier, an AB genus audio power amplifier and an operational amplifier one of them.
According to present embodiment, the power of described audio-frequency power amplifier is between between the 0.2W to 20W.
According to present embodiment, described amplifying circuit also comprises a transformer, is used to adjust the voltage level of described second audio signal.
According to present embodiment, the impedance ranges of described transformer is between 1 Ω to 50 Ω.
According to present embodiment, the input inductance range of described transformer is between between the 0.1mH to 10H; Be preferably, the input inductance range of described transformer is between between the 0.1mH to 100mH.The output inductance range of described transformer is between between the 1H to 100H.
According to present embodiment, the number of turns of described transformer is than between 5 to 500.The multiple of described transformer is than between 5 to 200.
According to present embodiment, described electret speakers be a soft loud speaker and a transparent loudspeaker one of them.
According to present embodiment, the capacitance of described electret speakers is between between the 30pF to 30nF.
According to present embodiment, described solar energy electret transducer also comprises an energy-storage module, and it is coupled to described solar energy power supply assembly.
For achieving the above object, the embodiment of the invention also provides a kind of low power consuming electret transducer, one first audio signal that this low power consuming electret transducer will be imported is converted to one second audio signal of output, described low power consuming electret transducer comprises: a low-voltage power provisioning component, and the voltage level that this low-voltage power provisioning component provides is between 0.03V to 20V; One change-over circuit, one first input end of this change-over circuit is coupled to an audio signal input end to receive described first audio signal, one second input is coupled to described low-voltage power provisioning component to receive a low voltage power from described low-voltage power provisioning component, and described first audio signal is converted to second audio signal of amplifying through this change-over circuit; And an electret speakers, it is coupled to an output of described change-over circuit, and this electret speakers receives described second audio signal from the output of described change-over circuit, and output and the corresponding sound of described second audio signal.
According to present embodiment, described low-voltage power provisioning component is a solar module.
According to present embodiment, described change-over circuit comprises an audio-frequency power amplifier and a step-up transformer, and it is one another in series and couples so that described first audio signal is converted to described second audio signal.
The solar energy electret transducer of the embodiment of the invention can be used as a kind of Portable transducer, and as single power source, combined charge circuit and energy-storage battery meet the environmental protection demand separately, have high additive value with solar cell for it.And the low power consuming electret transducer of the embodiment of the invention, it has the high advantages such as electrical efficiency and volume are light and handy of economizing, and can be applicable to various Portables or outdoor type electronic product.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, does not constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the amplifier circuit calcspar of a traditional transducers;
Fig. 2 is the amplifier circuit calcspar of another traditional transducers;
Fig. 3 is the amplifier circuit calcspar of the low power consuming electret transducer of one embodiment of the invention;
Fig. 4 is gain frequency response test result's the diagram of amplifier circuit of the low power consuming electret transducer of one embodiment of the invention.
Drawing reference numeral:
10 amplifier circuits
12 sound intensifiers
14 DC power supply
16 loud speakers
20 amplifier circuits
22 sound intensifiers
24 solar cells
25 energy-storage batteries
26 loud speakers
30 amplifier circuits
32 sound intensifiers
33 step-up transformers
34 solar cells
35 energy-storage batteries
36 electret speakers
Embodiment
Though the present invention will consult the accompanying drawing that contains preferred embodiment of the present invention and fully describe, before describing, this should be appreciated that the personage of skilled can revise invention described herein, obtains effect of the present invention simultaneously.Therefore, must understand following description to the personage of skilled and Yan Weiyi discloses widely, and its content does not lie in restriction the present invention.
See also Fig. 3, it is the amplifier circuit calcspar of the low power consuming electret transducer of one embodiment of the invention; In the present invention, described transducer converts electrical energy into the device of acoustic energy output, also promptly general alleged loud speaker; Low power consuming electret transducer of the present invention is with the power supply module of solar cell as its amplifying circuit.As shown in Figure 3, amplifying circuit 30 has comprised sound intensifier 32, step-up transformer 33, solar cell 34 and electret speakers 36.
The first input end of sound intensifier 32 is coupled to solar cell 34, and it receives one first voltage level from solar cell 34, and by by the effect of step-up transformer 33 first voltage level being boosted to second voltage level.Second input of sound intensifier 32 is for coupling receiving first audio signal (voice signal, its voltage are generally between between the 50mVAC to 2VAC) with an audio signal input end, and changes this first audio signal, makes it become second audio signal of amplification.
The input of electret speakers 36 is for being coupled to sound intensifier 32 by step-up transformer 33, after it receives second audio signal through amplifying, promptly responds this second audio signal and produces a voice output.
In the present invention, the impedance ranges of step-up transformer 33 is between 1 Ω to 50 Ω, and its input inductance range is between 0.1mH to 10H (being preferably 0.1mH to 100mH), and the output inductance range is between between the 1H to 100H; In addition, the number of turns of transformer 33 compares between 5 to 500, and is preferably between 5 to 200.
Because the present invention uses the electret transducer of low power consuming (only tens of milliamperes of electric energy input demand), its amplifier need not high Dc bias be that exportable differential type audio signal produces plug-type vibration to drive inner electret vibrating membrane.According to the present invention, the energy requirement of transducer is decided according to the size of loud speaker; For example, be example with the loud speaker size of 15cm * 15cm, its energy requirement is more than the about 2V to 5V of voltage, the about 30mA of electric current (integrated circuit drives the limit at present).For according with above-mentioned energy requirement, can use chip-shaped solar cell, thin film solar cell or the organic material type solar cell of size between 20mm * 20mm to 500mm * 500mm as solar energy power supply assembly of the present invention, its available voltage level is between 0.03V to 20V (even between 2V to 10V), and electric current is between between the 10mA to 200mA.
In the present invention, amplifying circuit 30 also can act as category-A audio-frequency power amplifier, category-B audio-frequency power amplifier, C genus audio power amplifier, D genus audio power amplifier, AB genus audio power amplifier exclusive disjunction amplifier, its power bracket with 0.2W to 20W is amplified this first audio signal (voice signal) and is converted to second audio signal of amplification, so that electret speakers produces corresponding voice output.
Based on the consideration of practical application, electret speakers 36 used in the present invention for be selected from soft loud speaker and transparent loudspeaker one of them, its capacitance is between between the 30pF to 30nF.
With present common solar energy module, almost all use in the practical application with solar cell collocation charging circuit and energy-storage battery 35, form the design of the energy-storage module shown in Fig. 3 dashed rectangle, to keep the stability of energy supply.Yet in the present invention owing to use the electret transducer of low power consuming, thereby need not use energy-storage module (shown in the dashed rectangle) promptly can solar cell 34 the direct whole transducer system of supply institute energy requirement.
See also Fig. 4, it has illustrated the gain frequency response test result of the amplifier circuit of low power consuming electret transducer according to an embodiment of the invention.With solar energy electret transducer of the present invention (power is 1W) is example, and getting its specification is frequency 1KHz, electric capacity 400pF, resistance 370k Ω, and solar cell is 1W (not containing energy-storage module).Calculate the output sound pressure level of electret transducer according to gain frequency response test result shown in Figure 4, its sound pressure level can reach more than the 85dB at distance 0.3m place.
By the present invention, it is volume required not only to save transducer, also can utilize solar power generation and reach portability, need not any chemical energy-storage battery effect, have more advantages such as high efficiency, low distortion, be suitable for portable product or outdoor type product etc., dark tool application potential.Therefore, the present invention is the invention of a novelty, progress and tool industrial applicability in fact, dark tool dynamogenetic value.
The present invention must be thought and is to modify as all by the people Ren Shi craftsman who is familiar with skill, does not so take off as Protector that attached application range is desired.
Claims (23)
1. a solar energy electret transducer is characterized in that, described transducer comprises:
One solar energy power supply assembly;
One amplifying circuit, it has a first input end that couples with described solar energy power supply assembly and one second input that couples with an audio signal input end, this amplifying circuit receives one first voltage level by this first input end, and this first voltage level boosted to one second voltage level, and this amplifying circuit receives one first audio signal by this second input, and this first audio signal is converted to second audio signal of amplifying; And
One electret speakers, its output that is coupled to described amplifying circuit are receiving described second audio signal, and an output sound corresponding with this second audio signal.
2. solar energy electret transducer as claimed in claim 1 is characterized in that, described solar energy power supply assembly be a chip-shaped solar cell, a thin film solar cell and an organic material type solar cell one of them.
3. solar energy electret transducer as claimed in claim 1 is characterized in that the size of described solar energy power supply assembly is between 20mm * 20mm to 500mm * 500mm.
4. solar energy electret transducer as claimed in claim 1 is characterized in that, the voltage level that described solar energy power supply assembly is provided is between between the 0.03V to 20V.
5. solar energy electret transducer as claimed in claim 1 is characterized in that, the voltage level that described solar energy power supply assembly is provided is between between the 2V to 10V.
6. solar energy electret transducer as claimed in claim 1 is characterized in that the voltage of described first audio signal is between between the 50mVAC to 2VAC.
7. solar energy electret transducer as claimed in claim 1 is characterized in that the alternating current of described solar energy power supply assembly is between between the 10mA to 200mA.
8. solar energy electret transducer as claimed in claim 1 is characterized in that described amplifying circuit is a booster circuit, is used to promote the voltage of described first voltage level and is converted to one second voltage level; And an audio-frequency power amplifier, be used to amplify described first audio signal and be converted to second audio signal of amplifying.
9. solar energy electret transducer as claimed in claim 8, it is characterized in that described audio-frequency power amplifier is: a category-A audio-frequency power amplifier, a category-B audio-frequency power amplifier, a C genus audio power amplifier, a D genus audio power amplifier, an AB genus audio power amplifier and an operational amplifier one of them.
10. solar energy electret transducer as claimed in claim 8 is characterized in that the power of described audio-frequency power amplifier is between between the 0.2W to 20W.
11. solar energy electret transducer as claimed in claim 1 is characterized in that described amplifying circuit also comprises a transformer, is used to adjust the voltage level of described second audio signal.
12. solar energy electret transducer as claimed in claim 11 is characterized in that, the impedance ranges of described transformer is between 1 Ω to 50 Ω.
13. solar energy electret transducer as claimed in claim 11 is characterized in that, the input inductance range of described transformer is between between the 0.1mH to 10H.
14. solar energy electret transducer as claimed in claim 11 is characterized in that, the input inductance range of described transformer is between between the 0.1mH to 100mH.
15. solar energy electret transducer as claimed in claim 11 is characterized in that, the output inductance range of described transformer is between between the 1H to 100H.
16. solar energy electret transducer as claimed in claim 11 is characterized in that, the number of turns of described transformer is than between 5 to 500.
17. solar energy electret transducer as claimed in claim 11 is characterized in that, the multiple of described transformer is than between 5 to 200.
18. solar energy electret transducer as claimed in claim 1 is characterized in that, described electret speakers be a soft loud speaker and a transparent loudspeaker one of them.
19. solar energy electret transducer as claimed in claim 1 is characterized in that the capacitance of described electret speakers is between between the 30pF to 30nF.
20. solar energy electret transducer as claimed in claim 1 is characterized in that, described solar energy electret transducer also comprises an energy-storage module, and it is coupled to described solar energy power supply assembly.
21. a low power consuming electret transducer is characterized in that, one first audio signal that this low power consuming electret transducer will be imported is converted to one second audio signal of output, and described low power consuming electret transducer comprises:
One low-voltage power provisioning component, the voltage level that this low-voltage power provisioning component provides is between 0.03V to 20V;
One change-over circuit, one first input end of this change-over circuit is coupled to an audio signal input end to receive described first audio signal, one second input is coupled to described low-voltage power provisioning component to receive a low voltage power from described low-voltage power provisioning component, and described first audio signal is converted to second audio signal of amplifying through this change-over circuit; And
One electret speakers, it is coupled to an output of described change-over circuit, and this electret speakers receives described second audio signal from the output of described change-over circuit, and output and the corresponding sound of described second audio signal.
22. low power consuming electret transducer as claimed in claim 21 is characterized in that, described low-voltage power provisioning component is a solar module.
23. low power consuming electret transducer as claimed in claim 21, it is characterized in that, described change-over circuit comprises an audio-frequency power amplifier and a step-up transformer, and it is one another in series and couples so that described first audio signal is converted to described second audio signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101729573A CN102026076A (en) | 2009-09-11 | 2009-09-11 | Solar electret transducer and low-energy consumption electret transducer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101729573A CN102026076A (en) | 2009-09-11 | 2009-09-11 | Solar electret transducer and low-energy consumption electret transducer |
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| CN102026076A true CN102026076A (en) | 2011-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009101729573A Pending CN102026076A (en) | 2009-09-11 | 2009-09-11 | Solar electret transducer and low-energy consumption electret transducer |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1481654A (en) * | 2000-10-20 | 2004-03-10 | 布鲁尔及凯尔声音及振动测量公司 | Capacitive transducer |
| CN2859976Y (en) * | 2005-07-01 | 2007-01-17 | 方书哲 | Wireless outdoor sonic equipment |
| CN201054779Y (en) * | 2007-06-15 | 2008-04-30 | 财团法人工业技术研究院 | Thin electret static speaker amplification device |
-
2009
- 2009-09-11 CN CN2009101729573A patent/CN102026076A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1481654A (en) * | 2000-10-20 | 2004-03-10 | 布鲁尔及凯尔声音及振动测量公司 | Capacitive transducer |
| CN2859976Y (en) * | 2005-07-01 | 2007-01-17 | 方书哲 | Wireless outdoor sonic equipment |
| CN201054779Y (en) * | 2007-06-15 | 2008-04-30 | 财团法人工业技术研究院 | Thin electret static speaker amplification device |
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Application publication date: 20110420 |