The key here is: RF chip. In 2020, foreign media found through dismantling Huawei P40 that although this mobile phone has a fairly high localization rate, the RF components of the mobile phone still rely on Qualcomm, Qorvo, Skyworks and other American companies, which is equivalent to "stuck Huawei's neck".
Huawei P50 does not support 5G, because Huawei P50 has two chip versions: one is equipped with Qualcomm Snapdragon 888 version, and the other is equipped with Hisilicon Kirin 9000 version. Among them, Snapdragon 888 is related to 5GTechnology is completely prohibited, and there are options for the approval of 4G-related technologies, so Huawei P50 can only choose 4G technology.
The most critical reason why it is still unable to support 5G is that the 5G communication technology related to the United States is directly banned to Huawei. It has to be said that the United States is too ruthless, forcing Huawei to the death.
Now Huawei P50 does not support 5G reason found! The filter chip is stuck, and the domestic self-sufficiency rate is zero. In fact, the reason why Huawei's P50 series mobile phones do not support 5G function is mainly because they are stuck by the RF front-end chip. And this RF front endIt is the filter chip, and the filter is the main chip for wireless electromagnetic wave signal transmission.
onsemi's SAA755: This chip is a very good audio power amplifier with excellent sound quality and efficient performance. TahiroWidely used in a variety of audio equipment, including home theater and Bluetooth speakers. The SAA755 features low distortion and wide band to provide clear, full sound quality.
Ante. Anter is a better microchamber, and there is a stronger home. Constant skill. Focus on product development. Jacenko. Products for families.
LM4562 chip has the advantages of extremely low distortion rate, low noise, high conversion rate, wide operating voltage range and large output current, and the high performance is unprecedented.
MACOM MAAL-011129 is a productTPA3116D2 is a low-power amplifier chip with excellent sound quality and excellent performance, suitable for a variety of audio systems. Its efficient and high-fidelity characteristics enable the audio equipment to provide a clear and delicate audio experience, so that the listener can enjoy a more real and moving music effect.
ESS Sabre is one of the most popular power amplifier chips on the market. Using 32-bit ultra-low distortion digital-to-analog conversion technology, it provides an extremely high signal-to-noise ratio and dynamic range, capable of outputting high-quality audio signals. This chip is widely used in high-end audio and home theater systems under brands such as Pioneer, Onkyo and Marantz, among others.
Power amplifier chip sound quality is good. If the i3 level configuration, the motherboard is not worth it. First, the performance is not high, change can not improve the performance; The second is to change the main plate, but also upgrade other accessories. For example, upgrade the CPU, hard disk, and memory capacity to improve the overall performance.
1, the domestic power amplifier model is ATA3090, brand: Xian 'anTai, Aigtek, Antai Electronic Technology Co., LTD., signal generator supporting the use of power amplifier is to amplify the small signal generated by the signal generator, through the control of voltage amplification to achieve the purpose of power amplification.
2, LNA-100: This is a low noise amplifier, with high gain, low noise and other characteristics, suitable for satellite communication, millimeter wave radar and other fields. SE5005L: This is a duplex variable gain amplifier for wireless communication systems such as Bluetooth and ZigBee.
3, the input offset voltage must be small enough to improve the precision of the electronic balanceI know TI has an OPA335, input offset voltage 0.05uV, and there is a Mei Xin, but did not remember the model.