CN203896494U - High-fidelity fiber earphone - Google Patents
High-fidelity fiber earphone Download PDFInfo
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- CN203896494U CN203896494U CN201420325507.XU CN201420325507U CN203896494U CN 203896494 U CN203896494 U CN 203896494U CN 201420325507 U CN201420325507 U CN 201420325507U CN 203896494 U CN203896494 U CN 203896494U
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- 239000000835 fiber Substances 0.000 title abstract description 15
- 230000005236 sound signal Effects 0.000 claims abstract description 27
- 230000003321 amplification Effects 0.000 claims abstract description 24
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 24
- 239000013307 optical fiber Substances 0.000 claims description 69
- 101001059353 Homo sapiens Methionyl-tRNA formyltransferase, mitochondrial Proteins 0.000 claims description 6
- 102100028928 Methionyl-tRNA formyltransferase, mitochondrial Human genes 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003990 capacitor Substances 0.000 description 27
- 238000010586 diagram Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009429 electrical wiring Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Abstract
The utility model discloses a high-fidelity fiber earphone which comprises a fiber reception seat, a fiber decoder, an offset voltage circuit, a loudspeaker power amplification circuit and a loudspeaker, wherein the fiber reception seat receives digital audio signals, the fiber decoder is electrically connected with the fiber reception seat and converts the digital audio signals into analog audio signals, the offset voltage circuit is electrically connected with the fiber decoder and provides an offset voltage for the fiber decoder, the input end of the loudspeaker power amplification circuit is electrically connected with the fiber decoder to amplify the power of the analog audio signals output by the fiber decoder, and the loudspeaker is connected with the loudspeaker power amplification circuit to output the amplified analog audio signals. The high-fidelity fiber earphone provided by the utility model uses the fiber decoder for audio conversion and power amplification, so that the sound quality output by the earphone is higher, the dynamic range is improved, the sound field is deepened, high-fidelity audio output is realized, and better sound playing effect is achieved.
Description
Technical field
The utility model relates to earphone, relates in particular to a kind of high-fidelity optical fiber earphone of built-in fiber decoder.
Background technology
Along with the development of Digital Electronic Technique, people are widely used various digital electronic products in entertainment life, are often equipped with earphone as audio output apparatus, for output audio signal in these portable type electronic products.
Existing earphone has two housings conventionally, and loudspeaker are installed in each housing, is respectively L channel loudspeaker and R channel loudspeaker.When people use earphone, two housings are worn over respectively outside left side ear and right ear.In addition, existing earphone all arranges audio signal input unit, the audio signal of exporting for receiving portable type electronic product.If earphone is wired earphone, audio signal input unit has audio socket conventionally, and for being inserted in the audio sockets of electronic equipment, and audio socket is connected by electrical wiring to loudspeaker, to loudspeaker output signal.If earphone is wireless headset, audio signal input unit has radio receiver, as Bluetooth signal receiving system etc., and the audio signal sending in wireless signal mode for receiving electronic product, and to loudspeaker output signal.
To economize into this ﹐ and only adopted cheap audio frequency conversion to promote loudspeaker ﹐ digital audio data with amplifier not obtain performance incisively and vividly in order to save because the audio frequency output of general mobile phone or music player is all subsidiary Gong Neng ﹐ manufacturer.Add that to output to the signal power of audio signal input unit very little, be often not enough to drive loudspeaker, therefore power amplifier need to be set conventionally in earphone, outputing to loudspeaker after the power amplification of audio signal.Existing earphone uses transistor composition power amplifier conventionally, but after transistor processes signal, often causes signal to occur the situation of distortion, has influence on the tonequality of earphone.
Utility model content
The purpose of this utility model is to overcome deficiency of the prior art and the high-fidelity optical fiber earphone of a kind of built-in fiber decoder of providing.
The technical scheme that the utility model solution prior art problem adopts is: a kind of high-fidelity optical fiber earphone, comprising:
Optical fiber received block, in order to receive digital audio and video signals;
Optical fiber decoder, described optical fiber decoder and described optical fiber received block are electrically connected, and convert described digital audio and video signals to simulated audio signal;
Bias voltage circuit, described bias voltage circuit and described optical fiber decoder are electrically connected, for described optical fiber decoder provides bias voltage;
Loudspeaker power amplifier, the input of described loudspeaker power amplifier and described optical fiber decoder are electrically connected, and the simulated audio signal of described optical fiber decoder output is carried out to power amplification;
Loudspeaker, described loudspeaker are connected with described loudspeaker power amplifier, for exporting the simulated audio signal after amplification.
Below technique scheme is further elaborated:
Further, also comprise pre-amplification circuit, described pre-amplification circuit is connected between described optical fiber decoder and loudspeaker power amplifier, in order to the simulated audio signal of optical fiber decoder output is amplified to the scope that described loudspeaker power amplifier can receive.
Further, described bias voltage is the direct voltage lower than zero volt.
Further, described optical fiber decoder comprises digital received chip and analog-digital chip;
The LRCKO pin of described digital received chip is connected with the LRCK pin of described analog-digital chip, BCKO pin is connected with the BCK pin of described analog-digital chip, DOUT pin is connected with the DATA pin of described analog-digital chip, and SCKO pin is connected with the SCK pin of described analog-digital chip;
The VDD pin of described digital received chip, VCC pin, FMT0 pin, FMT1 pin, PSCK0 pin connects respectively the first supply voltage, DGND pin, XTI pin, AGND pin, RSV pin is ground connection respectively, VDD pin is by the 202 capacity earth, the 201 electric capacity in parallel on described the 202 electric capacity, RST pin is connected to the first supply voltage by the 21 zero resistance, and by the 203 capacity earth, FILT pin is connected to respectively one end of the 209 resistance and the 204 electric capacity, the other end of described the 209 resistance connects one end of the 205 electric capacity, the other end ground connection of described the 204 electric capacity and the 205 electric capacity,
The VCCC pin of described analog-digital chip, VCCF pin, VCCL20 pin, VCCR pin, FMT0 pin, FMT2 pin connects second source voltage, RST pin and VDD pin connect the first supply voltage, FMT1 pin, DGND pin, AGNDC pin, AGNDF pin, AGNDL pin, AGNDR pin ground connection, VCCC pin, VCCF pin, VCCL20 pin, VCCR pin is by the 38 capacity earth, on described the 38 electric capacity, be parallel with the 33 electric capacity, VDD pin is by the 18 capacity earth, the 12 electric capacity in parallel on described the 18 electric capacity, VCOM pin is by the 17 capacity earth.
Further, described pre-amplification circuit comprises the first operational amplifier and the second operational amplifier, the positive input of described the first operational amplifier is successively by the 12 resistance, the 20 electric capacity is connected with the VOUTL+ pin of described analog-digital chip, reverse input end is successively by the 14 resistance, the 21 electric capacity is connected with the VOUTL-pin of described analog-digital chip, output is successively by the 25 electric capacity, the 20 resistance is connected with left horn power amplifier, between reverse input end and output, be connected with the 6th resistance, the 6th resistance is parallel with the 24 electric capacity,
The positive input of described the second operational amplifier is connected with the VOUTR+ pin of described analog-digital chip by the 11 resistance, the 22 electric capacity successively, reverse input end is connected with the VOUTR-pin of described analog-digital chip by the 13 resistance, the 23 electric capacity successively, output is connected with right horn power amplifier by the 15 electric capacity, the 21 resistance successively, between reverse input end and output, be connected with the 17 resistance, the 17 resistance is parallel with the 26 electric capacity.
Further, the node of described the 15 electric capacity and the 21 resistance is connected to the R pin of described optical fiber received block successively by the second resistance, the second electric capacity, the node of described the 25 electric capacity and the 20 resistance is connected to the L pin of described optical fiber received block successively by the first electric capacity, the first resistance, the OUT pin of described optical fiber received block connects the RXIN pin with digital received chip.
Further, described the first supply voltage is 3.3V, and second source voltage is 5.0V.
The beneficial effects of the utility model are: the high-fidelity optical fiber earphone that the utility model provides, adopt optical fiber decoder to carry out audio frequency conversion and power amplification, the tonequality of guaranteeing earphone output is higher, dynamic range strengthens, sound field is deepened, realize the high-fidelity output of audio frequency, arrive better music effect.
Brief description of the drawings
Fig. 1 is the frame principle figure of the utility model embodiment;
Fig. 2 is the circuit diagram of optical fiber decoder in the utility model embodiment;
Fig. 3 is the circuit diagram of pre-amplification circuit in the utility model embodiment, loudspeaker power amplifier;
Fig. 4 is the circuit diagram of power module in the utility model embodiment;
Fig. 5 is the circuit diagram of bias voltage circuit in the utility model embodiment.
Realization, functional characteristics and the advantage of the utility model object, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Describe the technical solution of the utility model in detail below with reference to drawings and the specific embodiments, so as clearer, understand invention essence of the present utility model intuitively.
Shown in Fig. 1, the utility model embodiment provides a kind of high-fidelity optical fiber earphone, comprise optical fiber received block 10, optical fiber decoder 20, power module 40, bias voltage circuit 50, loudspeaker power amplifier 60 and loudspeaker 70, optical fiber received block 10 is connected on the music equipment such as mobile phone by optical fiber tone frequency channel wire, in order to receive from the digital audio and video signals of music equipment output.Optical fiber decoder 20 is electrically connected with described optical fiber received block 10, and the described digital audio and video signals that optical fiber received block 10 is inputted converts simulated audio signal to; Power module 40 is connected with bias voltage circuit 50 and optical fiber decoder 20, bias voltage circuit 50 is electrically connected with described optical fiber decoder 20, for described optical fiber decoder 20 provides bias voltage, this bias voltage is the direct voltage lower than zero volt, simultaneously power module 40 provides driving voltage for optical fiber decoder 20, so, drive optical fiber decoder 20 to work.Loudspeaker power amplifier 60 generally comprises left horn power amplifier 601 and right horn power amplifier 602, the input of left horn power amplifier 601 and right horn power amplifier 602 and described optical fiber decoder 20 are electrically connected, and the simulated audio signal that described optical fiber decoder 20 is exported carries out power amplification.Loudspeaker 70 comprise left horn and right horn, and left horn, right horn correspondence are connected with left horn power amplifier 601 and right horn power amplifier 602, for exporting the simulated audio signal after amplification.
In a preferred embodiment of the present utility model, also comprise pre-amplification circuit 30, described pre-amplification circuit 30 is connected between described optical fiber decoder 20 and loudspeaker power amplifier 60, be amplified to 60 scopes that can receive of described loudspeaker power amplifier in order to the simulated audio signal that optical fiber decoder 20 is exported, be conducive to the impedance matching of optical fiber decoder 20 and loudspeaker, guarantee the steady and smooth output of audio signal, ensure the high-fidelity output of audio signal.
The high-fidelity optical fiber earphone providing according to the utility model embodiment, adopts optical fiber decoder 20 to carry out audio frequency conversion and power amplification, guarantees that the tonequality of earphone output is higher, dynamic range strengthens, sound field is deepened, and realizes the high-fidelity output of audio frequency, arrives better music effect.
Further, in an embodiment of the present utility model, shown in Fig. 2, optical fiber decoder 20 comprises digital received chip U200 and analog-digital chip U12; The LRCKO pin of digital received chip U200 is connected with the LRCK pin of described analog-digital chip U12, BCKO pin is connected with the BCK pin of described analog-digital chip U12, DOUT pin is connected with the DATA pin of described analog-digital chip U12, and SCKO pin is connected with the SCK pin of described analog-digital chip U12.The VDD pin of digital received chip U200, VCC pin, FMT0 pin, FMT1 pin, PSCK0 pin connects respectively the first supply voltage, DGND pin, XTI pin, AGND pin, RSV pin is ground connection respectively, VDD pin is by the 202 capacitor C 202 ground connection, the 201 capacitor C 201 in parallel in described the 202 capacitor C 202, RST pin is connected to the first supply voltage by the 21 zero resistance R210, and by the 203 capacitor C 203 ground connection, FILT pin is connected to respectively one end of the 209 resistance R 209 and the 204 capacitor C 204, the other end of described the 209 resistance R 209 connects one end of the 205 capacitor C 205, the other end ground connection of described the 204 capacitor C the 204 and the 205 capacitor C 205.The VCCC pin of analog-digital chip U12, VCCF pin, VCCL20 pin, VCCR pin, FMT0 pin, FMT2 pin connects second source voltage, RST pin and VDD pin connect the first supply voltage, FMT1 pin, DGND pin, AGNDC pin, AGNDF pin, AGNDL pin, AGNDR pin ground connection, VCCC pin, VCCF pin, VCCL20 pin, VCCR pin is by the 38 capacitor C 038 ground connection, in described the 38 capacitor C 038, be parallel with the 33 capacitor C 033, VDD pin is by the 18 capacitor C 18 ground connection, the 12 capacitor C 12 in parallel in described the 18 capacitor C 18, VCOM pin is by the 17 capacitor C 17 ground connection.
In an embodiment of the present utility model, shown in Fig. 3, pre-amplification circuit 30 comprises the first operational amplifier U3A and the second operational amplifier U3B, the positive input of described the first operational amplifier U3A is successively by the 12 resistance R 12, the 20 capacitor C 20 is connected with the VOUTL+ pin of described analog-digital chip U12, reverse input end is successively by the 14 resistance R 14, the 21 capacitor C 21 is connected with VOUTL-pin of described analog-digital chip U12, output is successively by the 25 capacitor C 25, the 20 resistance R 20 is connected with left horn power amplifier 601, between reverse input end and output, be connected with the 6th resistance R 6, the 6th resistance R 6 is parallel with the 24 capacitor C 24.The positive input of the second operational amplifier U3B is connected with the VOUTR+ pin of described analog-digital chip U12 by the 11 resistance R the 11, the 22 capacitor C 22 successively, reverse input end is connected with VOUTR-pin of described analog-digital chip U12 by the 13 resistance R the 13, the 23 capacitor C 23 successively, output is connected with right horn power amplifier 602 by the 15 capacitor C the 15, the 21 resistance R 21 successively, between reverse input end and output, be connected with the 17 resistance R 17, the 17 resistance R 17 and be parallel with the 26 capacitor C 26.The node of the 15 capacitor C 15 and the 21 resistance R 21 is connected to the R pin of described optical fiber received block successively by the second resistance R 2, the second capacitor C 2, the node of described the 25 capacitor C 25 and the 20 resistance R 20 is connected to the L pin of described optical fiber received block successively by the first capacitor C 01, the first resistance R 01, the OUT pin of described optical fiber received block 10 connects the RXIN pin with digital received chip U200.
In a specific embodiment of the present utility model, the first supply voltage is 3.3V, and second source voltage is 5.0V.
Further, in specific embodiment of the utility model, Fig. 4 is the circuit theory diagrams of power module 40, comprises charging management chip U2, mains switch S2 etc., is battery charging by charging management chip.Fig. 5 is the circuit theory diagrams of bias voltage circuit 50, comprises integrated chip U1, inductance L 2 etc., for optical fiber decoder provides bias voltage.
In sum, high-fidelity optical fiber earphone of the present utility model, adopts optical fiber decoder 20 to carry out audio frequency conversion and power amplification, the tonequality of guaranteeing earphone output is higher, and dynamic range strengthens, and sound field is deepened, realize the high-fidelity output of audio frequency, arrive better music effect.
The foregoing is only preferred embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (7)
1. a high-fidelity optical fiber earphone, is characterized in that, comprising:
Optical fiber received block, in order to receive digital audio and video signals;
Optical fiber decoder, described optical fiber decoder and described optical fiber received block are electrically connected, and convert described digital audio and video signals to simulated audio signal;
Bias voltage circuit, described bias voltage circuit and described optical fiber decoder are electrically connected, for described optical fiber decoder provides bias voltage;
Loudspeaker power amplifier, the input of described loudspeaker power amplifier and described optical fiber decoder are electrically connected, and the simulated audio signal of described optical fiber decoder output is carried out to power amplification;
Loudspeaker, described loudspeaker are connected with described loudspeaker power amplifier, for exporting the simulated audio signal after amplification.
2. high-fidelity optical fiber earphone according to claim 1, it is characterized in that, also comprise pre-amplification circuit, described pre-amplification circuit is connected between described optical fiber decoder and loudspeaker power amplifier, in order to the simulated audio signal of optical fiber decoder output is amplified to the scope that described loudspeaker power amplifier can receive.
3. high-fidelity optical fiber earphone according to claim 1, is characterized in that, described bias voltage is the direct voltage lower than zero volt.
4. high-fidelity optical fiber earphone according to claim 2, is characterized in that: described optical fiber decoder comprises digital received chip and analog-digital chip;
The LRCKO pin of described digital received chip is connected with the LRCK pin of described analog-digital chip, BCKO pin is connected with the BCK pin of described analog-digital chip, DOUT pin is connected with the DATA pin of described analog-digital chip, and SCKO pin is connected with the SCK pin of described analog-digital chip;
The VDD pin of described digital received chip, VCC pin, FMT0 pin, FMT1 pin, PSCK0 pin connects respectively the first supply voltage, DGND pin, XTI pin, AGND pin, RSV pin is ground connection respectively, VDD pin is by the 202 capacity earth, the 201 electric capacity in parallel on described the 202 electric capacity, RST pin is connected to the first supply voltage by the 21 zero resistance, and by the 203 capacity earth, FILT pin is connected to respectively one end of the 209 resistance and the 204 electric capacity, the other end of described the 209 resistance connects one end of the 205 electric capacity, the other end ground connection of described the 204 electric capacity and the 205 electric capacity,
The VCCC pin of described analog-digital chip, VCCF pin, VCCL20 pin, VCCR pin, FMT0 pin, FMT2 pin connects second source voltage, RST pin and VDD pin connect the first supply voltage, FMT1 pin, DGND pin, AGNDC pin, AGNDF pin, AGNDL pin, AGNDR pin ground connection, VCCC pin, VCCF pin, VCCL20 pin, VCCR pin is by the 38 capacity earth, on described the 38 electric capacity, be parallel with the 33 electric capacity, VDD pin is by the 18 capacity earth, the 12 electric capacity in parallel on described the 18 electric capacity, VCOM pin is by the 17 capacity earth.
5. high-fidelity optical fiber earphone according to claim 4, it is characterized in that: described pre-amplification circuit comprises the first operational amplifier and the second operational amplifier, the positive input of described the first operational amplifier is successively by the 12 resistance, the 20 electric capacity is connected with the VOUTL+ pin of described analog-digital chip, reverse input end is successively by the 14 resistance, the 21 electric capacity is connected with the VOUTL-pin of described analog-digital chip, output is successively by the 25 electric capacity, the 20 resistance is connected with left horn power amplifier, between reverse input end and output, be connected with the 6th resistance, the 6th resistance is parallel with the 24 electric capacity,
The positive input of described the second operational amplifier is connected with the VOUTR+ pin of described analog-digital chip by the 11 resistance, the 22 electric capacity successively, reverse input end is connected with the VOUTR-pin of described analog-digital chip by the 13 resistance, the 23 electric capacity successively, output is connected with right horn power amplifier by the 15 electric capacity, the 21 resistance successively, between reverse input end and output, be connected with the 17 resistance, the 17 resistance is parallel with the 26 electric capacity.
6. high-fidelity optical fiber earphone according to claim 5, it is characterized in that: the node of described the 15 electric capacity and the 21 resistance is connected to the R pin of described optical fiber received block successively by the second resistance, the second electric capacity, the node of described the 25 electric capacity and the 20 resistance is connected to the L pin of described optical fiber received block successively by the first electric capacity, the first resistance, the OUT pin of described optical fiber received block connects the RXIN pin with digital received chip.
7. high-fidelity optical fiber earphone according to claim 5, is characterized in that: described the first supply voltage is 3.3V, second source voltage is 5.0V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325507.XU CN203896494U (en) | 2014-06-18 | 2014-06-18 | High-fidelity fiber earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420325507.XU CN203896494U (en) | 2014-06-18 | 2014-06-18 | High-fidelity fiber earphone |
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| CN203896494U true CN203896494U (en) | 2014-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420325507.XU Expired - Fee Related CN203896494U (en) | 2014-06-18 | 2014-06-18 | High-fidelity fiber earphone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110942780A (en) * | 2019-12-30 | 2020-03-31 | 深圳市研强物联技术有限公司 | Audio Signal Processing System Based on MIC Array |
-
2014
- 2014-06-18 CN CN201420325507.XU patent/CN203896494U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110942780A (en) * | 2019-12-30 | 2020-03-31 | 深圳市研强物联技术有限公司 | Audio Signal Processing System Based on MIC Array |
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Effective date of registration: 20160606 Address after: 518000, L building, building 20, 9 blocks C, science and Technology Park, 1 Qing Xiang Road, Longhua New District, Guangdong, Shenzhen, China Patentee after: Shenzhen Micro Communication Co., Ltd. Address before: 518000 Guangdong city of Shenzhen province Baoan District Songgang Yanchuan Street Community Yan Chao Lu No. 57 building F 3-4 layer Patentee before: SHENZHEN AOHONG ELECTRONICS CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141022 Termination date: 20160618 |
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| CF01 | Termination of patent right due to non-payment of annual fee |