Earphone amplifier with USB soundcard and hub

Abstract

The invention relates to an earphone loudspeaker with USB sound card and collecting tray, used in computer, wherein it is formed by voice power amplifier, USB collecting tray, USB sound card circuit, USB plug line, USB plug, power output earphone plug, and frame; USB plug is connected to the USB plug of computer; when the USB plug is connected, the computer USB plug can transmit data and power, to connect the anode and ground line of amplifier to computer, to be powered, to confirm normal operation; and the data line can feed digit signal from USB plug to the sound card to be decoded to obtain high-quality voice, to be amplified by earphone amplifier.

Description

technical field [0001] The invention relates to an earphone amplifier, in particular to an earphone amplifier with a USB sound card and a hub. Background technique [0002] At present, there are some headphone amplifier products on the market, which are powered by an independent AC power supply. Generally, a CD player is used as the sound source, and professional-grade headphones are connected to listen to it, which can achieve immersive effects. These headphone amplifiers are expensive and are aimed at audiophiles. Professional grade headphone amplifier products. At present, the vast majority of people who use computers, if they want to use earphones to enjoy music on the computer, they all plug the earphones directly into the audio output jack of the computer to listen. Because the audio output power of the AC97 sound card on the computer motherboard is very small, it belongs to Audio signal line output, plugging in ordinary earphones can only be regarded as listening to ...

AI Technical Summary

Problems solved by technology

[0002] At present, there are some headphone amplifier products on the market, which are powered by an independent AC power supply. Generally, a CD player is used as the sound source, and professional-grade headphones are connected to listen to it, which can achieve immersive effects. These headphone amplifiers are expensive and are aimed at audiophiles. Professional grade headphone amplifier products

At present, the vast majority of people who use computers, if they want to use earphones to enjoy music on the computer, they all plug the earphones directly into the audio output jack of the computer to listen. Because the audio output power of the AC97 sound card on the computer motherboard is very small, it belongs to Audio signal line output, plugging in ordinary headphones can only be regarded as listening to music, the volume is low, the effect is poor, and the bass can hardly be heard, because the low frequency signal requires a larger driving current, although the audio signal line output has a very flat 20HZ-20KHZ The frequency response curve, but because it cannot provide enough driving current to the earphone, even if it is replaced with a high-end earphone with high sensitivity and low impedance, it is only slightly better, and the effect is still unsatisfactory. But the effect is also average, and because the electromagnetic interference inside the computer has a great influence on the output audio signal, it is difficult to hear the pure music effect

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