CN2710041Y - USB audio device - Google Patents
USB audio device Download PDFInfo
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- CN2710041Y CN2710041Y CN 03278460 CN03278460U CN2710041Y CN 2710041 Y CN2710041 Y CN 2710041Y CN 03278460 CN03278460 CN 03278460 CN 03278460 U CN03278460 U CN 03278460U CN 2710041 Y CN2710041 Y CN 2710041Y
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Abstract
The utility model discloses a USB audio device, adopting a USB audio converting interface. A USB protocol processor and an audio demoding circuit chip are connected with a computer USB port, the audio input ends of which are connected to the audio input end of the microphone, a microphone signal received by an external audio receiving device is connected to a computer through analogue to digital conversion by a USB mode, or the audio output end of the USB chip is connected to an audio signal power amplifying, a high-low sound regulating, an earphone driving or an ultra-undertone processing circuit, and a sound signal generated by a computer system is changed into an audio signal capable of being received by human ears through digital to analogue conversion. Otherwise, the USB audio device is provided with a USB concentrator chip expanding port to compose a USB expanding connection port through an HUB expanding chip TUSB2064 and obtain a device simultaneously provided with multiple audio device connecting ports, and the device is a composite external device according with the USB protocol.
Description
Technical field
The invention belongs to computer technology, electronic technology and sound technique field.Especially utilize the audio devices or the equipment of computer universal serial bus agreement (usb protocol), comprise the USB active audio amplifier of band USB HUB, the USB power amplifier of band USB HUB, the external sound card of USB of band USB HUB, USB earphone microphone of band USB HUB or the like, also comprise devices such as the USB active audio amplifier of not being with USB HUB, power amplifier, the external sound card of band USB, band USB earphone microphone.
Background technology
Computer audio equipment is the part of voice output that multi-media computer system acoustic information reduction can be accepted for people's ear.
Traditional multimedia computer audio frequency apparatus adopts multimedia loudspeaker box and built-in computer sound card on the Basic Analog Electronics to be used usually.Sound card is with the pairing analog electrical signal of the required sound that sends of multi-media computer system, transmission through analog signal line, power amplification (being generally in the 15W) by active audio amplifier is converted to voice signal with speaker system with analog electrical signal again, as shown in Figure 1.
The shortcoming of this analogue technique mainly contains 3 aspects:
1, sound card is positioned at computer cabinet, and computer system is a digital circuit, has been full of various high frequency interference, so the sound card that is subjected to the digital circuit interference is difficult to reach the audio signal reduction effect of high-fidelity.
2, transmission line adopts analog signal transmission, and it is serious to cause being subjected to external interference in the transmission course of signal.Simultaneously, the contact condition of the connector coupling part of circuit has considerable influence for the effect of sound system, comes in contact the crack when bad easily.Resolution in present multi-media computer system music format is more and more higher, program source more and more develops (the multimedia music form has supported that resolution is that 24bit, dynamic range reach 115dB at present) to high-fidelity, under these circumstances, the bottleneck of simulated audio signal transmission having become restriction computer phoneme acoustic system effect.
3, simple analog audio system itself is not the computer peripheral equipment of standard, and its number of channels and effect can't satisfy multi-media computer system high-fidelity tonequality and multiple channel acousto requirement.
For solving the high-fidelity problem of multimedia computer, need the compatible mutually independently DAB peripheral hardware of a kind of and present main flow computing machine development trend, make full use of the versatility of standard computer peripheral hardware and the dirigibility of computer software, and improve acoustics.This just require this peripheral hardware especially audio frequency audio frequency peripheral hardware must be a kind of standard peripherals that satisfies the computer general-purpose agreement, and have favorable compatibility with the computer peripheral equipment of other type.
Summary of the invention
The purpose of this utility model is: at existing sound card---in the easy receipts computing machine high frequency interference of active audio amplifier system and the analog signal transmission process and contact condition disturb, be difficult to the shortcoming compatible flexibly with other computer standard peripheral hardware, be based upon on current computer universal serial bus protocol (usb protocol) standard, be a series of digital audio-frequency apparatus that satisfy usb protocol 1.1 standards and USB audio frequency apparatus 1.0 standards, simultaneously the usb bus hub (HUB) that satisfies usb protocol 1.1 standards be can have, the audio frequency high-fidelity problem of multi-media computer system and the computer system compatibility issue of peripheral hardware and software solved.
The purpose of this utility model is achieved in that the USB audio devices, adopt USB audio conversion interface, promptly handle and be connected the computing machine USB port with the audio decoding circuit chip by usb protocol, the audio frequency input of described usb protocol processing and audio decoding circuit chip is connected to the audio frequency input of microphone, the microphone signal that the peripheral hardware audio reception device is received is connected to computing machine through analog to digital conversion by the USB mode, or the output of the audio frequency of USB chip is connected to the sound signal power amplification, high low pitch joint, earphone drives or the subwoofer treatment circuit, and the voice signal that computer system is taken place becomes the audio signal that people's ear can be accepted through digital-to-analog conversion.
Especially in addition be provided with usb hub chip Extended Capabilities Port, constitute USB expansion connectivity port, finish the processing of USB HUB agreement, had the device of multiple audio frequency apparatus thus simultaneously by HUB extended chip TUSB2064.As USB earphone microphone with the USB speaker of USB HUB, the USB power amplifier of band USB HUB, the external sound card of USB of being with USB HUB, band USB HUB.Be a series of compound peripheral hardwares that meet usb protocol.
Simultaneously, utilize the standard device drivers system that has in Microsoft's operating system, make up complete USB communication structure.The audio signal that computing machine is sent to peripheral hardware by the USB mode is handled with distinct methods such as power amplification, high low pitch joint, earphone driving, ultralow range divisional processing through after the digital-to-analog conversion, the microphone signal that peripheral hardware is received is sent to computing machine through analog to digital conversion by the USB mode and handles, and obtains the USB speaker with USB HUB, the USB power amplifier of band USB HUB, the external sound card of USB of band USB HUB, the final products such as USB earphone microphone of band USB HUB thus.
One-piece construction, as shown in Figure 2.
The effect that the present invention reaches is:
Adopt USB technology transfer digital audio signal, to reduce the interference that the analog audio transmission link is subjected to.
The sound card that need not use a computer, the influence of disturbing with the high frequency noise that reduces computer system itself.
Satisfy 1.0 requirements of USB audio frequency apparatus.
Satisfy the general peripheral hardware requirement of usb protocol 1.1 standards, plug and play, and with current main-stream operating system (Windows 98/Windows 2000/Windows Me/Windows XP/Windows 2003 etc.) compatibility.
Various media player compatibilities such as software and Media Player, Realplayer, Winamp.
Have the usb bus hub (HUB) that satisfies usb protocol 1.1 standards, can carry out the function expansion of USB device.Has compatibility with the existing USB peripheral hardware that meets usb protocol 1.1 standards.
Have serial audio frequency functions such as power amplification, high low pitch joint, subwoofer processing, audio amplifier speaker system, earphone, microphone.
Description of drawings
Fig. 1 tradition sound card and active audio amplifier schematic diagram
Fig. 2 is the utility model structural principle block diagram
Fig. 3 has USB interface and the audio decoding circuit schematic diagram of USB HUB
Fig. 4 is not with USB interface and the audio decoding circuit schematic diagram of USB HUB
Fig. 5 is a sound channel LM3886 of a utility model power amplification circuit schematic diagram
Annotate: among Fig. 2,1 and 2 select one.It is 3 optional that high low pitch saves.4～8 must select one or multinomial.So, be combined into the audio frequency peripheral hardware of a series of USB interface.
Embodiment
This invention is implemented, must be finished following steps:
1, accompanying drawing 3 or accompanying drawing 4 are depicted as circuit board, buy and weld according to the components and parts shown in the figure.
2, make circuit modules such as selected power amplification in the accompanying drawing 1, high low pitch joint, subwoofer processing, audio amplifier speaker system, earphone, microphone of ripe method.
3, design and making shell.
4, multimedia computer on the connection carries out fabricating quality and detects.
Below, be example with the USB power amplifier that has USB HUB, describe implementation process in detail.
(1), and makes according to the accompanying drawing 3 circuit board figure that draws.
(2) buy and weld according to components and parts title, explanation and encapsulation listed in the following table.
Explanation to Fig. 3 circuit: Fig. 4 is the partial circuit figure of Fig. 3, so do not explain in addition.
The USB audio conversion interface chip PCM2904 that typical USB audio frequency apparatus circuit adopts American TI Company to produce is protocol processes and the decoding that core is finished the USB audio frequency apparatus, and the usb hub chip TUSB2064 that adopts TI company to produce simultaneously finishes the processing of USB HUB agreement.
Among the figure, REG103 is the power management chip of DDPAK-5 encapsulation, guarantees that the decoded portion power work is under the low noise state.USBPORT is the usb signal input incoming interface of entire circuit, and decoded simulating signal is received tone, the power amplification circuit of system from VOUTL, the VOUTR output of PCM2904 by VOUT CON4.PCM2904 has mould/number and two kinds of data converting functions of D/A simultaneously concurrently, the sound coded signal of computer system can be become simulated audio signal by D/A switch, also the signal of external microphone generating can be become the signal format that meets usb protocol by mould/number conversion simultaneously and pass to computer system.
Usb hub chip TUSB2064 is responsible for the processing of USB HUB agreement.PORT2, PORT3, PORT4 are respectively the USB HUB mouths of 3 external expansions, play the effect of hub.TPS2044 is the power management chip of supporting with it each interface of HUB, is responsible for monitoring for the power supply situation of each HUB mouth.3 SN75240 chip USUP0, USUP1 and USUP2 are connected between a plurality of USB peripheral hardwares on the USB HUB, play the power supply of eliminating between a plurality of USB peripheral hardwares that are connected on the USB HUB and disturb.Inductance L 1, L2, L3, LO1, LO2, LO3, LO4, LO5, LO6, LO7, LO8 are used for the filtering of power supply and ground wire.Power management chip TPS7333 is responsible for the working power that TUSB2044 provides 3.3V.
(3) power amplification circuit is a prior art, and the LM3886 that employing National Semiconductor produces among the figure carries out making sheet, components and parts purchase and welding as core according to Fig. 5 circuit theory diagrams.Annotate: this is the schematic diagram of the power amplification of a sound channel, slavish copying two-channel.Sound signal power amplification circuit, high low pitch economize on electricity road, earphone driving circuit and subwoofer treatment circuit are similar prior art, and the application seldom gives unnecessary details.
(4) design and making shell, the circuit that above-mentioned steps is made installs and fixes, and fixed connecting piece, as USB interface, audio amplifier line interface.
(5) Yi Yitai has the computing machine of USB mouth, operating system is Windows 98/Windows 2000/WindowsMe/Windows XP/Windows 2003, the audio frequency peripheral hardware that above-mentioned steps is made into connects in the USB mode, can wait for operating system searching and affirmation equipment, install driver.Can constitute the computing machine playback system this moment, uses Media Playe, media players such as Winamp, Realplayer can play the music of various forms.
Usb protocol processing and audio decoding circuit chip are more, as PCM2700, and PCM2702, PCM2900, PCM2902, PCM2901, PCM2903, PCM2904 PCM2906 chip all can use.
Claims (5)
1, the USB audio devices, it is characterized in that adopting USB audio conversion interface, promptly handle and be connected the computing machine USB port with the audio decoding circuit chip by usb protocol, the audio frequency input of described usb protocol processing and audio decoding circuit chip is connected to the audio frequency input of microphone, the microphone signal that the peripheral hardware audio reception device is received is connected to computing machine through analog to digital conversion by the USB mode, or the output of the audio frequency of USB chip is connected to the sound signal power amplification, high low pitch joint, earphone drives or the subwoofer treatment circuit, and the voice signal that computer system is taken place becomes the audio signal that people's ear can be accepted through digital-to-analog conversion.
2, by the described USB audio devices of claim 1, it is characterized in that being provided with in addition usb hub chip Extended Capabilities Port, constitute USB expansion connectivity port by HUB extended chip TUSB2064, had the device of multiple audio frequency apparatus connectivity port simultaneously, and for meeting the compound peripheral hardware of usb protocol.
3,, it is characterized in that usb protocol is handled and the audio decoding circuit chip is PCM2700, PCM2702, PCM2900, PCM2902, PCM2901, PCM2903, PCM2904 PCM2906 chip by claim 1 or 2 described USB audio devices.
4,, it is characterized in that being provided with three SN75240 chip USUP0, USUP1 and USUP2 and be connected between a plurality of USB peripheral hardwares on the USB HUB by the described USB audio devices of claim 2.
5,, it is characterized in that being provided with the filtering of inductance L 1, L2, L3, L01, L02, L03, L04, L05, L06, L07, L08 connection power supply and ground wire by the described USB audio devices of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03278460 CN2710041Y (en) | 2003-09-11 | 2003-09-11 | USB audio device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03278460 CN2710041Y (en) | 2003-09-11 | 2003-09-11 | USB audio device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2710041Y true CN2710041Y (en) | 2005-07-13 |
Family
ID=34842874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03278460 Expired - Fee Related CN2710041Y (en) | 2003-09-11 | 2003-09-11 | USB audio device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2710041Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708082A (en) * | 2012-05-09 | 2012-10-03 | 福兴达科技实业（深圳）有限公司 | Method for playing high-fidelity music through mobile terminal, and mobile terminal for same |
| CN109741756A (en) * | 2018-12-29 | 2019-05-10 | 苏州思必驰信息科技有限公司 | Method and system based on USB external equipment transmission operation signal |
-
2003
- 2003-09-11 CN CN 03278460 patent/CN2710041Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102708082A (en) * | 2012-05-09 | 2012-10-03 | 福兴达科技实业（深圳）有限公司 | Method for playing high-fidelity music through mobile terminal, and mobile terminal for same |
| WO2013166967A1 (en) * | 2012-05-09 | 2013-11-14 | 福兴达科技实业（深圳）有限公司 | Method for playing high-fidelity music through mobile terminal and mobile terminal thereof |
| CN109741756A (en) * | 2018-12-29 | 2019-05-10 | 苏州思必驰信息科技有限公司 | Method and system based on USB external equipment transmission operation signal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |