TPS73201DBVR Power IC_GJM0225C1C100GB01D Introduction

According to TI, creating high profit margins is related to their use of 12-inch fabs to produce analog chips and reduce costs. Take TI as an example, its profits and profit margins have maintained an upward trend over the past 10 years and reached new highs in 2018. In the analog chip market, manufacturers such as TI, ADI, and Maxim all have gross profit margins higher than the industry average. The data shows that TI's analog chips had an operating profit margin of 46.7% in 2018, but the operating profit margin of embedded processors was only 29.6%.

With the advent of 5G networks and next-generation communications technology, many sectors from business to healthcare, agriculture and education will be affected. ?? Once the communications infrastructure is in place to support the transfer of large amounts of data, businesses and governments will want to provide wireless coverage for point-to-point connections in the last mile, from objects communicating with each other in warehouses to communicating smartphones, thermostats, heart rate between monitors and many other devices.

TPS73201DBVR Power IC_GJM0225C1C100GB01D

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The most basic structure of the BAW filter is that two metal electrodes sandwich a piezoelectric film (the thickness of the Quartz substrate is 2um at 2GHz), and the acoustic wave oscillates in the piezoelectric film to form a standing wave.

In order to gain an in-depth understanding of TI's new breakthrough in BAW technology, let's start with the principle of BAW filter: . For the first time in the industry, TI uses this technology for integrated clock functions. • In the past, BAW resonator technology has been used to filter signals in communication technologies such as smartphones.

"Quartz crystals require additional components to extend their accuracy -- over time -- as their performance changes beyond controllable temperature changes," he added. In addition, Solis said, "using a BAW resonator is more efficient than using a quartz crystal. precise.

TPS73201DBVR Power IC_GJM0225C1C100GB01D

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. In order to keep the acoustic wave in the piezoelectric film to oscillate, there must be sufficient isolation between the oscillating structure and the external environment to obtain a small loss and a large Q value. On the other side of the oscillating structure, the acoustic impedance of the piezoelectric material is not much different from that of other substrates (such as Si), so the piezoelectric layer cannot be deposited directly on the Si substrate. The propagation speed of sound waves in solids is ~5000m/s, which means that the acoustic impedance of solids is about 105 times that of air, so 99.995% of the sound wave energy will be reflected back at the boundary between the solid and the air, which is the same as the original wave (incident wave). together to form a standing wave.

In short, advances in BAW technology have brought "higher performance, simpler design, lower cost and smaller size" to wired and wireless networks, Wong explained.

TPS73201DBVR Power IC_GJM0225C1C100GB01D

”. Ray Upton, vice president of TI’s Interconnect Microcontroller Group, said: “The ability to make accurate, informed decisions through the use and analysis of large amounts of data is a very important innovation capability. Wireless networks are at the heart of this data migration, and the ability to connect the last mile through connected devices is a critical part of the data loop.

The BAW filter is more suitable for frequencies above 2.5GHz. The manufacturing process of the BAW filter is also very consistent with the existing IC manufacturing process, and is suitable for overall integration with other active circuits. .

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