STM32F103CBU6TR_CSTLS4M00G56-A0 Introduction

From a regional perspective, Japan closed the largest number of fabs. It is reported that Renesas expects to close two more 150mm fabs in 2020 or 2021. Take Renesas as an example. The company's two recently closed fabs are both 150mm, including a fab in Kochi Prefecture, Japan, which produces analog, logic devices and some obsolete micro components. In addition, Renesas has adjusted its factory in Otsu, Shiga Prefecture, Japan, to manufacture optoelectronic devices.

The TI BAW oscillator is an electronic oscillator circuit that utilizes the piezoelectric effect to generate a stable electronic signal through the mechanical resonance of a vibrating miniature acoustic resonator (BAW). This precise high-frequency signal provides a clock and timing reference for electronic systems.

STM32F103CBU6TR_CSTLS4M00G56-A0

DP83867CRRGZT

TPS74801DRCR TPS22918DBVR TLV62569ADRLR TLV62569ADRLT TPS61230ARNST.

"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.

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.

TPS61230ARNSR TPS613221ADBVR TPS613221ADBVT LM321LVIDBVR TPS562201DDCR.

STM32F103CBU6TR_CSTLS4M00G56-A0

LM5175PWPR SMD Transistor

The overall effect of this structure is equivalent to contact with air, and most of the sound waves are reflected back. This structure is called BAW-SMR (Solidly Mounted Resonator), as shown below. The reflector consists of several layers of alternating high and low impedance layers. For example, the first layer has a large acoustic wave impedance, the second layer has a small acoustic wave impedance, and the third layer has a large acoustic wave impedance, and the thickness of each layer is λ/4 of the acoustic wave, so that most of the wave will be reflected back and superimposed with the original wave. One way is to form a Bragg reflector under the oscillating structure to reflect sound waves into the piezoelectric layer.

TPS54310PWPR TPA3116D2DADR LM3429MHX/NOPB DP83867CRRGZT TPS62172DSGR.

LM5176PWPR LM5176PWPT DRV8876PWPR TPS23751PWPR TPS61194PWPR.

TPS560430XFDBVR XTR117AIDGKR CSD15380F3T MSP-EXP432P401R TPS2051BDBVR.

STM32F103CBU6TR_CSTLS4M00G56-A0

. The resonator used by the ladder type (SAW also mentioned at the end) includes series and parallel. A series resonator plus a parallel resonator is called a stage, and the entire ladder type filter can be composed of several stages.

The particles in the solid vibrate in an elliptical trajectory, and the long axis of the ellipse is perpendicular to the surface of the solid. For SAW, also called Rayleighsurface wave, there are both longitudinal waves and transverse waves. .

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