¡ö
News Center
Business Tel£º0760-88885090
Project Tel£º0760-88885090
Customer Tel£º0760-85168108
Email£ºrichard@ueaudio.com
Project Tel£º0760-88885090
Customer Tel£º0760-85168108
Email£ºrichard@ueaudio.com
¡ö
Detail
Amplifier PCBA with USB audio decoder
AddTime£º2021/10/8 18:33:10
With the advancement of semiconductor technology, notebook computers become thinner and thinner, bringing portability at the same time, but the inevitable decline in sound quality. Although often some notebook this flutes the built-in sound box that has so-and-so brand to hold, but clever woman cannot make bricks without rice, so frivolous volume, want to get the sound of sonorous and vigorous, still is not realistic.
Then the product that a lot of dozen notebook sound box appeared, but the essence of this kind of sound box no more than is common active sound box narrowed, line of power supply line, audio frequency is not little, use rise, do not have too big different with common sound box.
The company launched "a line" plan very good solve the problem, this scheme will be low voltage class D power amplifier and the USB audio decoder to do together, and the internal circuit is optimized, using the program, you just need to a USB cable connected to computers, power supply and digital audio transmission was done through USB, not only convenient, more pure and sound quality better.
The sound card that notebook computer uses is integrated type more, the price is low and easy to be disturbed by other circuit on motherboard, sound is generally thin, lack music sex and affinity. There is a separate sound card inside the scheme, and the digital signal is obtained from the USB interface of the laptop computer. The connection between the speaker and the laptop computer is completely digital, which ensures the integrity and low loss of audio signal transmission to the greatest extent.
The scheme uses a Class D power amplifier (digital amplifier), unlike the Class AB amplifier used in most common speakers. Ordinary class AB amplifier only about 30% of the input signal into a voice signal, other electrical signals at the same time of work into heat and the USB port of computer can provide the highest current can only be reached around 500-1000 ma, the laptop "precious little electric power supply system, is a great deal of waste and heavy burden. The D amplifier, on the other hand, has a conversion efficiency of 80-90%. Only 10% or so of the electrical signals are converted to heat, and heating is negligible. Without a doubt, such amplifiers are clearly better suited for laptops. Due to the high efficiency of class D power amplifiers, the normal load current of ordinary USB ports can be converted into sufficient speaker volume.
This scheme provides a better solution for the upgrade of the notebook speaker scheme, and is worth the adoption of relevant products.
