SN74AHC125RGYR IC_TPS61032PWPR 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 like 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%.

Also, for analog use, the ROI of a 300mm fab is likely to be higher because it can last 20 to 30 years. TI has been steadily ramping up its production of analog chips on 300mm wafers in recent years to cut costs and increase productivity. TI said the 300mm fab yields 40% cheaper chips than the 200mm process used by competitors.

SN74AHC125RGYR IC_TPS61032PWPR

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The 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.

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"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.

SN74AHC125RGYR IC_TPS61032PWPR

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The technology, which also enables high-precision and robust communication between IoT devices, can now be developed in a less bulky form, said Kim Wong, vice president of high-speed data and clocking at TI.

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SN74AHC125RGYR IC_TPS61032PWPR

The typical basic structure is shown in the figure (a) above, with the piezoelectric layer sandwiched between the upper and lower metal electrodes, the corresponding mBVD equivalent circuit is shown in the figure (b) above, and the corresponding impedance is shown in the figure (c) above. It can be seen that there are two resonance frequencies, series (fs) and parallel (fp). The working principle is as shown below.

There are also different structures where sound waves propagate as transverse waves. In the above-mentioned BAW-SMR and FBAR?filter diagrams, sound waves propagate in the form of longitudinal waves, that is, the direction of particle vibration and the direction of wave propagation are parallel.

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