CN203435136U - Audio frequency amplifier integrated with USB power supply interface - Google Patents

Abstract

An audio frequency amplifier integrated with a USB power supply interface comprises the USB power supply interface, an audio frequency output interface, a circuit board, an audio frequency amplifying circuit and an audio frequency input interface. The USB power supply interface, the audio frequency output interface, the audio frequency amplifying circuit and the audio frequency input interface are all installed on the circuit board. The USB power supply interface, the audio frequency input interface and the audio frequency output interface are all electrically connected with the audio frequency amplifying circuit. By adopting the audio frequency amplifier, noises and losses are effectively reduced, so that timbre is good after the amplification of the audio frequency amplifying circuit, the production efficiency is increased, the product quality is optimized, and the cost is reduced.

Description

The audio frequency amplifier of integration USB power supply interface

Technical field

The utility model relates to a kind of audio frequency amplifier of integration USB power supply interface.

Background technology

In the existing active audio amplifier product that possesses USB power supply interface, USB power supply interface and audio input interface are generally connected to the audio frequency amplifier on audio amplifier circuit board by Great Wall Software's line, and for convenience of being connected of active audio amplifier and electronic equipment, flexible cord is 90 centimetres, it can cause loss to a certain degree and produce noise to input signal, thereby make the tonequality after audio frequency amplifier amplifies not good, even can distortion.In addition, during production, need to use a large amount of workmans that flexible cord is welded to each parts, production efficiency is low, and can affect product quality.

Utility model content

For the deficiencies in the prior art, the purpose of this utility model is intended to provide a kind of audio frequency amplifier of integration USB power supply interface, and it can be optimized tonequality and can enhance productivity

For achieving the above object, the utility model adopts following technical scheme:

An audio frequency amplifier for integration USB power supply interface, it comprises USB power supply interface, audio output interface, circuit board, audio amplifier circuit and audio input interface; USB power supply interface, audio output interface, audio amplifier circuit and audio input interface are all installed on this circuit board, and USB power supply interface, audio input interface and audio output interface are all electrically connected this audio amplifier circuit.

Further, audio frequency amplifier also comprises shell, this circuit board is built in this shell, on the front end face of this shell, offer a square aperture, thereafter two circular opens and key switch are offered in end face or side, this USB power supply interface is over against the square aperture of this shell, and audio input interface and audio output interface are respectively over against two circular opens.

The beneficial effects of the utility model are as follows:

1, the utility model is all integrated into USB power supply interface, audio output interface and audio input interface on the circuit board at audio amplifier circuit place, power supply signal transmits without the wire by 90 centimetres as prior art, can greatly reduce loss of signal, the audio frequency flexible cord length of relative prior art, the wire that connects audio input interface in this device also shortens greatly, can effectively reduce noise and loss, make the tonequality after audio amplifier circuit amplifies good.

2, this device can be used machine to carry out full-automatic paster production, enhance productivity, and optimizing product quality.

3, save current supply line, be conducive to reduce costs, and be conducive to environmental protection.

Accompanying drawing explanation

Fig. 1 is the structural representation of better embodiment of the audio frequency amplifier of the utility model integration USB power supply interface.

Fig. 2 is the schematic diagram of circuit board of the audio frequency amplifier of Fig. 1.

Embodiment

Below in conjunction with accompanying drawing and embodiment, the utility model is described further:

Refer to Fig. 1 and Fig. 2, the utility model relates to a kind of audio frequency amplifier of integration USB power supply interface, and its better embodiment comprisesshell 70, USBpower supply interface 20,audio output interface 50,circuit board 10,audio amplifier circuit 40 andaudio input interface 30.

Thiscircuit board 10 is built in thisshell 70, USBpower supply interface 20,audio output interface 50,audio amplifier circuit 40 andaudio input interface 30 are all installed on thiscircuit board 10, and USBpower supply interface 20,audio input interface 30 andaudio output interface 50 are all electrically connected thisaudio amplifier circuit 40.

On the front end face of thisshell 70, offer a square aperture, thereafter two circular opens and key switch are offered in end face or side, this USBpower supply interface 20 is over against the square aperture of thisshell 70, andaudio input interface 30 andaudio output interface 50 are respectively over against two circular opens.

The utility model is by USBpower supply interface 20,audio output interface 50 andaudio input interface 30 are all integrated on the circuit board ataudio amplifier circuit 40 places, during use, only the USBpower supply interface 20 of this device need be plugged into computer, by very short wire, connect again the audio output interface ofaudio input interface 30 and computer, by wire, connectaudio output interface 50 and audio amplifier again, due to, USBpower supply interface 20 is directly welded on circuit board, power supply signal transmits without the wire by 90 centimetres as prior art, can greatly reduce loss, the audio frequency flexible cord length of relative prior art, the wire that connectsaudio input interface 30 in this device also shortens greatly, can effectively reduce noise and loss, make the tonequality afteraudio amplifier circuit 40 amplifies good.In addition, this device can be used machine to carry out full-automatic paster production, enhance productivity, and optimizing product quality.Moreover, saved current supply line, be conducive to reduce costs.

For a person skilled in the art, can make other various corresponding changes and distortion according to technical scheme described above and design, and these all changes and distortion all should belong to the protection range of the utility model claim within.

Claims (2)

1. an audio frequency amplifier for integration USB power supply interface, is characterized in that: it comprises USB power supply interface, audio output interface, circuit board, audio amplifier circuit and audio input interface; USB power supply interface, audio output interface, audio amplifier circuit and audio input interface are all installed on this circuit board, and USB power supply interface, audio input interface and audio output interface are all electrically connected this audio amplifier circuit.

2. the audio frequency amplifier of integration USB power supply interface as claimed in claim 1, it is characterized in that: audio frequency amplifier also comprises shell, this circuit board is built in this shell, on the front end face of this shell, offer a square aperture, thereafter two circular opens and key switch are offered in end face or side, this USB power supply interface is over against the square aperture of this shell, and audio input interface and audio output interface are respectively over against two circular opens.

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