AD1154AD_AD1938YSTZ Introduction

The charger can provide a power density of 155 mW/mm2 (100 W/in2), which is about twice higher than the market. The new buck-boost charger helps engineers reduce solution size and bill of materials (BOM) and is TI's only device that fully integrates: .

Texas Instruments (TI) (NASDAQ: TXN) has been making progress for decades. We are a global semiconductor company that designs, manufactures, tests and sells analog and embedded processing chips.

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AD1154AD_AD1938YSTZ

The resonator used in the Ladder type (SAW is also mentioned later) 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 working principle is as shown below. 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).

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