On April 8, we had previously exposed the news vivo Xplay Snapdragon 600 (quad core), 2G RAM, Adreno 320GPU, 1080P five inch screen, 13 million stack cameras+5 million front cameras, 3400mAh capacity batteries will be used; On the basis of X1 dual chip CS4398+CS8422, an operational amplifier chip OPA2604 is added.

Now Love to play computer games We also got some detailed information about this independent operational amplifier chip OPA2604 at the first time.

As we learned from insiders in vivo, OPA2604 brings many difficulties in research and development. At first, it was designed according to ± 5V voltage, and we hope to connect only one - 5V boost IC externally, while sharing the+5V boost IC with CS4398. But I didn't expect that the working voltage brought by ± 5V was extremely unstable and fluctuated constantly in actual use. As a result, the signal to noise ratio of Xplay cannot meet the expectation.

It is said that Vivo once wanted to give up OPA2604 and constantly introduce new voltage control ICs. However, when using ± 5.8V power supply and independent dual boost IC control circuit, it could not achieve stable and perfect output effect. This serious problem may affect the normal listing of Xplay. "

Details about OPA2604:

The OPA2604 is a special operational amplifier (dual operational amplifier) designed by Burr Brown for high-performance audio systems. It has the characteristics of ultra-low harmonic distortion, low noise, high gain bandwidth, etc. Dual FET inputs provide a wider dynamic range for the OPA2604, and the sound quality is more durable than that of bipolar op amps (bipolar op amps produce more odd harmonic distortion, while it is generally believed that even harmonic distortion is flattering, such as the sound quality of electronic tubes). It is generally used in professional audio equipment, I/V conversion of PCM DAC system, spectrum analyzer, active filter, sensor energy conversion, data acquisition and other systems. It can directly replace the general-purpose operational amplifier in the audio system, such as 45585532. X

OPA2604 is one of the most famous operational amplifiers after NE5532, known as "the emperor of operational amplifier". Operational amplifier refers to operational amplifier, a chip that amplifies and processes audio signals. It can create higher quality and stronger analog signal output capability for the player.

Among music enthusiasts, OPA2604 is known as the most "gutsy" op amp, characterized by powerful low frequency, mellow medium frequency, smooth high frequency, and extremely sweet overall sound style, similar to the taste of electronic tube amplifier (that is, gutsy), which is highly favored by enthusiasts. The famous British CD player brand, LINN (Lotus Brand), loves this op amp. The high resolution and sweet taste it brings is also known as "Lotus Poison".

So when this operational amplifier chip is added to Xplay How about the actual effect in the end? May we pay attention together@ Follow up!