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The circuit breaker has a simple principle, few parts and is easy to maintain. When replacing parts, attention should be paid to the reliability of the parts and the parameters should meet the requir...[Details]
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Welding technology is a very important process in the industrial manufacturing process. Generally speaking, welding technology is used wherever metal materials are processed. However, welding is al...[Details]
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On September 3, under the guidance of the Ministry of Industry and Information Technology and the Shanghai Municipal People's Government, the China Semiconductor Industry Association and the China El...[Details]
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What is the difference between a human-machine interface and what people often call a "touch screen"? Strictly speaking, there is an essential difference between the two. Because a "touch screen" i...[Details]
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Finally got a USB HID device and made a USB keyboard to play with~~~~The report descriptor made me dizzy for a few days~~~~~Several HID-related protocols are quite long~~~~~~Tomorrow I will make a USB...[Details]
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On August 14, Reuters quoted people familiar with the matter as saying that the European Commission will legislate in September to unify charging standards for mobile phones and other electronic devi...[Details]
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Abstract: This paper introduces the internal structure, functional characteristics and basic principles of the brushless DC motor controller dedicated integrated chip UCC3626, and gives a design me...[Details]
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Recently, the Hefei Economic and Information Technology Bureau issued the "Hefei 5G Industry Development Plan (2019-2022)" (hereinafter referred to as the "Plan"). The "Plan" clearly states that by 2...[Details]
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TSMC, the leading foundry, held a legal person briefing on the 18th. Chairman Liu Deyin and President Wei Zhejia are optimistic about the strong demand for smartphones and high-performance computing ...[Details]
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On April 7, according to the official website of the White House, the US-EU Trade and Technology Committee said in a recent joint statement that it plans to use AI to find alternatives to the "perm...[Details]
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Air Mass AM (Air Mass) is the path length of sunlight through the atmosphere, referred to as AM. The outer space is AM 0, and when the sunlight shines vertically on the earth, it is AM1 (equivalent to...[Details]
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目前,我国高压电动机的保护主要有机电式和集成电路两种,但都存在着诸多弊病,不能很好地保护电动机。其中,异步电动机的机电式保护,主要以电流增大作为判据,保护原理粗略,对断相等严重不对称故障,由于一般不出现显著的电流增大,从而使保护装置难以及时动作,造成事故扩大;集成电路式保护虽在保护原理上有所改善,但其保护特性一般无法与电动机热曲线实现较好配合,常发生拒动或误动,严重的甚至烧毁电动机。因此,研...[Details]
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Switched Capacitor Filters
1. Basic Principle of Switched Capacitor Filter
The switched capacitor filter is composed of MOS capacitors, switches and operational amplifiers. It has a simp...[Details]
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This article summarizes:
The replacement of measuring instruments and equipment in oil production stations is an important task. By upgrading related measuring instruments and supporting equipment, t...[Details]
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The combination and arrangement of atomic groups in a compound is determined by the characteristic functional groups that appear in the infrared spectrum.
(1) The structure of tetrachloroparacres...[Details]