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GSMA (Global System for Mobile Communications Association), the organizer of the 2020 Mobile World Congress (hereinafter referred to as "MWC") originally scheduled to be held in Barcelona, official...[Details]
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In order to save costs and time, people have fewer face-to-face meetings or conversations in business and personal life than before. Mobile phones and Internet phone (VoIP) have become the driving ...[Details]
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1. Processor performance indicators There are many performance indicators used to evaluate CPUs. Test standards with different performance focuses may produce different indicator values. The follow...[Details]
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A compiler is a program that translates a "high-level language" into a "machine language (low-level language)". The main workflow of a modern compiler: source code → preprocessor → compiler → assem...[Details]
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As one of the work contents of many people, PIC microcontroller plays an important role. But most people don't know why to use PIC microcontroller. To solve this problem, we must talk about several m...[Details]
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The instruction set of the ARM microprocessor is of the load/store type, that is, the instruction set can only process data in registers, and the processing results must be placed back in the regis...[Details]
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Electronic equipment manufacturers often use electromagnetic interference ( EMI ) and radio frequency interference ( RFI) shielding measures to protect sensitive digital circuits from external radiat...[Details]
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若需控制LED亮度，就必须具备能够提供恒定、稳压电流的驱动器。而要达到此目标，驱动器拓朴必须能产生足够的输出电压来顺向偏置LED。那么当输入和输出电压范围重叠时，设计人员又该如何选择呢?转换器有时可能需要逐渐降低输入电压，但有时也可能需要升高输出电压。以上情况通常出现在那些具有大范围"脏"(dirty)输入功率来源的应用中，例如车载系统。在这种降压/升压的操作中，几种拓朴可以达到较好的效果，...[Details]
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1.
LED
package discolors after short baking and long baking.
Reasons: 1. The stacking in the oven is too dense and the ventilation is poor.
2. The local temperature of the oven is ...[Details]
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In 2019, my country issued a large number of policy documents to promote the construction of the power market, and the full liberalization of power generation and consumption plans of commercial po...[Details]
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Abstract: Introducing the improved design of the cathode pulse amplifier of the light point tester. After adding the original light point tester cathode pulse amplifier to the circuit automatic ...[Details]
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Johnson Controls, a global leader in diversified technology and industrial fields, appeared at the 2019 China Refrigeration Exhibition (Booth D09, Hall W5, Shanghai New International Expo Center). Fo...[Details]
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According to the final statistics of Gartner, global semiconductor revenue in 2021 increased by 26.3% year-on-year, totaling US$595 billion. "The various events that caused the current chip shorta...[Details]
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The preprocessing command begins with the symbol "#" and includes three parts: macro definition, file inclusion, and conditional processing. I have not used conditional compilation yet, so I will i...[Details]
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Motor variable frequency starting and soft starting are two different starting methods. They have obvious differences in the control method, starting performance, energy consumption, etc. of the mo...[Details]
Automotive Electronics
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