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Today (9), Bloomberg reported that Apple and its manufacturing partner Foxconn violated Chinese labor laws by using too many temporary workers at the world's largest iPhone factory in Zhengzhou, Chin...[Details]
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1. Instrument Model Keysight N5230A Network Analyzer 2. Testing process The instrument powered on and started up normally. Then, during the self-test operation, it was found that the instrument rep...[Details]
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Welding Mechanism Full Version
Wetting: During the welding process, we call the process in which the molten solder forms a uniform, smooth, continuous and firmly attached alloy on the surface of th...[Details]
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The mobile phone market has entered the era of inventory, but the overall space is still expanding. In the past year, shipments in the Chinese market alone reached 300 million units. After enter...[Details]
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The previous articles introduced UART serial port, address: http://blog.csdn.net/devintt/article/details/52512457 This time, let’s talk about another commonly used serial port: SPI communication Po...[Details]
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The process of receiving electrical energy from an external circuit and converting it into chemical energy of the battery. After the battery consumes its energy through discharge, it can be restore...[Details]
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Access cards have become more advanced and intelligent over time. Today's 13.56 MHz contactless smart cards are a typical example. Such cards include a tamper-proof RFID element connected to a mu...[Details]
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In portable and miniaturized consumer products, Class D audio power amplifiers have been widely used. This article introduces the design principle of the output low-pass filter of a Class D audio amp...[Details]
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In the first article in this series, we compared enhancement-mode gallium nitride (eGaN) power devices to advanced silicon MOSFETs using different metrics. eGaN FETs differ from silicon devices i...[Details]
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The clamp-type grounding resistance meter is suitable for measuring electrical systems with loops. It adopts an indirect measurement method with high accuracy and strong pertinence. It does not requi...[Details]
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On April 7, according to Korean media MK, the U.S. Patent Trial and Appeal Board (PTAB) recently made a ruling in favor of Samsung Electronics in a memory patent invalidation case.
This means ...[Details]
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In the process of multifunctionalization of consumer electronic devices, the demand for small size and low cost has never stopped. Taking a typical switching power supply as an example, since its volu...[Details]
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At present, there are two ISO standards in the field of 13.56 MHz wireless radio frequency identification technology in my country, one is ISO14443 and the other is ISO15693. ISO14443 defines two type...[Details]
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What can an oscilloscope do? Observe the signal time and voltage, calculate the frequency of the periodic signal (Frequency), observe the rising and falling edges (monotonicity), know the overshoot (...[Details]
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Android supports three types of processors (CPUs): ARM, Intel, and MIPS. ARM is undoubtedly the most widely used. Intel is well known for its popularity in desktops and servers, but has relatively ...[Details]
Microcontroller MCU
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