AD1851R-J_AD301ALN Introduction

Today, human society has entered an unprecedentedly prosperous modern era, and the colorful life is inevitably eroded by various noises far exceeding the "noisy of cars and horses". "The ancients more than a thousand years ago were full of yearning for a quiet environment." The hut is in a human environment, without the noise of cars and horses.

Texas Instruments (TI) today introduced an ultra-low power switching regulator TPS62840, its operating quiescent current (IQ) can reach 60nA, only 1/3 of similar devices in the industry. In addition, the new DC/DC converters have a wide input voltage (VIN) range of 1.8V to 6.5V to support a variety of chemistries and configurations. It delivers very high light-load efficiency of 80% at 1-µA loads, enabling designers to extend the battery life of their systems or use fewer or smaller batteries to shrink their overall power solution size and reduce costs.

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Active noise reduction ANC is to listen to the background noise, use the chip and algorithm model to calculate the noise sound wave and generate the anti-phase sound wave, and use the sound wave superposition and cancellation principle to achieve the noise reduction effect. . Throughout its development history, in the early 20th century, acoustic experts began to consider starting from the noise itself to achieve the purpose of reducing noise. Earlier in 1933, German physicist Paul Lueg proposed active noise control, that is, active noise reduction. concept, using the principle of destructive interference of sound waves to reduce noise.

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A key component required to achieve this is a new connection manager based on the Arm® Cortex®-M4 subsystem, which reduces some of the processing-intensive communications and optimizes connectivity. The F2838x microcontrollers integrate three industrial communication protocols, enabling designers to tailor a microcontroller to the specific needs of each system.

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"Wireless networking is 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." said Ray Upton, vice president of TI's Interconnect Microcontroller Group Analyzing large amounts of data to make accurate and informed decisions is a very important innovation capability.

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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