CN201860296U - HUB type audio frequency power amplifier with inbuilt USB (universal serial bus) sound card - Google Patents
HUB type audio frequency power amplifier with inbuilt USB (universal serial bus) sound card Download PDFInfo
- Publication number
- CN201860296U CN201860296U CN201020563522XU CN201020563522U CN201860296U CN 201860296 U CN201860296 U CN 201860296U CN 201020563522X U CN201020563522X U CN 201020563522XU CN 201020563522 U CN201020563522 U CN 201020563522U CN 201860296 U CN201860296 U CN 201860296U
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- usb
- power amplifier
- frequency power
- sound card
- audio frequency
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Abstract
The utility model relates to a HUB type audio frequency power amplifier with an inbuilt USB (universal serial bus) sound card for a computer. The HUB type audio frequency power amplifier with the inbuilt USB sound card comprises a USBHUB (universal serial bus hub), a USB sound card circuit, an audio frequency power amplifying circuit, a USB plug cord, a USB socket, a power output headset jack and a shell, wherein the USB socket is connected with a USB socket of the computer in a matching way, and then the USB socket is communicated, so that the USB socket of the computer can be used for data transmission as well as power supply; a positive electrode of the audio frequency power amplifier circuit and an earth wire are connected with the computer; the computer provides power for the audio frequency power amplifier; therefore, the normal work of the audio frequency power amplifier can be ensured; a digital signal taken from a USB interface by a data line is sent to the sound card circuit to be decoded as an audio frequency signal with high fidelity, and is amplified by the audio frequency power amplifier and is sent to an earphone for aural reception or output; meanwhile, the functions of the USB socket and the USB HUB are also provided so as to facilitate the use of the computer for users.
Description
One, affiliated technical field
The utility model relates to a kind of audio-frequency power amplifier, especially a kind of audio-frequency power amplifier of HUB type internal USB sound card.
Two, background technology
At present, some audio-frequency power amplifier products are arranged on the market, by independent ac power supply, generally use the CD player to be source of sound, connecting professional earphone listens to, can reach effect on the spot in person, these audio-frequency power amplifiers cost an arm and a leg, and are the professional audio-frequency power amplifier products towards the Fancier level.And present most computed people, if use the earphone music appreciating on computers, all be that the audio output jack that earphone directly inserts computer is listened to, because, the sound output of AC97 sound card is very little on the computer motherboard, belong to the output of audio signal circuit, insert general earphone and can only hear music at last, volume is little, weak effect, almost can't hear bass, because low frequency signal needs bigger drive current, although the output of audio signal circuit has very smooth 20HZ-20KHZ frequency response curve, owing to can not provide enough drive currents to earphone, changed highly sensitive exactly, the advanced headset that impedance is low, also just slightly better, effect is still undesirable, though the sound card power output on some computer motherboard more greatly, but effect also is general, and, because the electromagnetic interference of computer-internal has very big influence to the audio signal of exporting, be difficult to hear pure music effect.And the audio-frequency power amplifier that designs a kind of HUB type internal USB sound card just can address this problem well.
Three, utility model content
The purpose of this utility model just provides a kind of audio-frequency power amplifier, especially a kind of audio-frequency power amplifier of HUB type internal USB sound card.This audio-frequency power amplifier, comprise: USB HUB, USB sound card circuit, audio power amplifying circuit, USB plug line, USB socket, power output earphone jack, microphone jack etc., it is characterized in that: audio-frequency power amplifier be provided with the USB socket and with computer on the USB plug that is connected of USB socket, taking out digital signal by USB interface from computer is decoded by the sound card circuit that carries, amplify output through audio frequency amplifier again, USB HUB is provided function simultaneously.
The technical scheme that its technical problem that solves the utility model adopts is: by the USB plug that is connected with computer USB socket, when the USB socket is connected, make full use of computer USB socket and not only can transmit data, and the characteristics that can power, the positive pole of audio-frequency power amplifier circuit and ground wire are linked to each other with ground wire with positive pole in the computer USB socket, by computer is the audio-frequency power amplifier power supply, guarantee the operate as normal of audio-frequency power amplifier, simultaneously, data wire will be sent into the sound card circuit by the digital signal that USB interface is taken out and decode, become the audio signal of high-fidelity, the amplification of process audio-frequency power amplifier is sent into earphone and is listened to or export, and provide USB socket, the function of USB HUB is for the user of computer provides convenience.
The audio-frequency power amplifier of the utility model HUB type internal USB sound card is reasonable in design, simple in structure, profile can be designed to different shape, volume is little, patch conveniently, wherein, audio-frequency power amplifier can use any amplifier circuit and device to form, sound output is changeable, its circuit structure form also can be varied, generally by volume control circuit, tone control, frequency equalization circuit and power amplification circuit are formed, by USB plug from computer introduce+power supply of 5V power supply, can regulate volume and high low pitch according to hearer's needs, frequency characteristic and even reverberation effect, because audio-frequency power amplifier has enough undistorted power outputs, can provide enough drive currents to earphone, so, changed and used earphone can only hear music at last in the past on computers, volume is little, weak effect, almost can't hear the situation of bass, when connecting professional earphone and listening to, can reach effect on the spot in person; As when adopting the bigger audio power amplifying circuit of power output, can also be used for promoting loud speaker, become the active audio amplifier system, because, there be not of the influence of the electromagnetic interference of computer-internal to the audio signal of output, so, can hear very pure music effect.
USB sound card circuit can adopt general various sound card circuit at present in the utility model, and the various functions of senior sound controls such as Xear3D can be arranged, also can be in sound card integrated low power amplifier; Owing to be decoding and amplification outside computer cabinet, thereby stopped the electromagnetic interference of cabinet inside, make tonequality purer, signal to noise ratio can reach about 90 decibels, and can support 2 sound channels and the output of simulation multichannel.The input signal of microphone also can become digital signal by the sound card circuit conversion, handles by USB interface input computer.
USB HUB adopts custom circuit to form in the utility model, and the additional outlet that a 5V is arranged, generally speaking, when power consumption is in the amount of power supply scope of USB interface restriction, can outlet is vacant, only use a computer and go up USB modular connection power supply; And work as USB interface more than 4, external USB device power consumption is big or when adopting the bigger audio-frequency power amplifier of power output, just 5 volts of attaching plugs of special use can be inserted vacant outlet, to guarantee the operate as normal of USB HUB, audio-frequency power amplifier and external equipment.
The operation principle of the audio-frequency power amplifier of the utility model HUB type internal USB sound card is provided in detail by the following drawings and embodiment.
Four, description of drawings
Fig. 1 is the fundamental diagram of the audio-frequency power amplifier of HUB type internal USB sound card.
Fig. 2 is the fundamental diagram of another embodiment of audio-frequency power amplifier of HUB type internal USB sound card.
Among the figure: 1, audio power amplifying circuit 2, earphone microphone jack 3, output plughole
4, USB plug 5,5V outlet 6, resistance 7, USB HUB
8, USB socket 9, USB sound card circuit 10, electric capacity 11, light-emitting diode
Claims (4)
1. the audio-frequency power amplifier of a HUB type internal USB sound card, form by USB HUB, USB sound card circuit, audio power amplifying circuit, USB plug line, USB socket, microphone jack, power output earphone jack, external power supply socket, shell etc., it is characterized in that: the USB plug line is electrically connected with USB HUB, USB HUB is electrically connected with USB sound card circuit, and USB sound card circuit is electrically connected with audio power amplifying circuit.
2. the audio-frequency power amplifier of HUB type internal USB sound card according to claim 1, it is characterized in that: audio-frequency power amplifier is made up of volume control circuit, tone control circuit, frequency equalization circuit, reverberation circuit.
3. the audio-frequency power amplifier of HUB type internal USB sound card according to claim 1 is characterized in that: USB sound card circuit has the senior sound controlled function of Xear3D, is integrated with low-power amplifier in sound card.
4. the audio-frequency power amplifier of HUB type internal USB sound card according to claim 1 is characterized in that: USB socket and external power supply socket are arranged on the USB HUB.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020563522XU CN201860296U (en) | 2010-10-18 | 2010-10-18 | HUB type audio frequency power amplifier with inbuilt USB (universal serial bus) sound card |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020563522XU CN201860296U (en) | 2010-10-18 | 2010-10-18 | HUB type audio frequency power amplifier with inbuilt USB (universal serial bus) sound card |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201860296U true CN201860296U (en) | 2011-06-08 |
Family
ID=44106095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020563522XU Expired - Fee Related CN201860296U (en) | 2010-10-18 | 2010-10-18 | HUB type audio frequency power amplifier with inbuilt USB (universal serial bus) sound card |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201860296U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694506A (en) * | 2012-06-06 | 2012-09-26 | 国光电器股份有限公司 | Audio-frequency amplifier system powered based on power supply of computer USB (Universal Serial Bus) power source and integration of USB audio card |
| RU170666U1 (en) * | 2016-06-17 | 2017-05-03 | Денис Юрьевич Ярков | System of external computer sound card-sound amplifier with signal transmission and power supply via USB port |
-
2010
- 2010-10-18 CN CN201020563522XU patent/CN201860296U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102694506A (en) * | 2012-06-06 | 2012-09-26 | 国光电器股份有限公司 | Audio-frequency amplifier system powered based on power supply of computer USB (Universal Serial Bus) power source and integration of USB audio card |
| RU170666U1 (en) * | 2016-06-17 | 2017-05-03 | Денис Юрьевич Ярков | System of external computer sound card-sound amplifier with signal transmission and power supply via USB port |
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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: 20110608 Termination date: 20111018 |