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• Basic literature on operational amplifiers

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  An op amp (abbreviated as op amp) is a very high gain circuit. In real circuits, some functional module is usually combined with a feedback circuit. This is an amplifier with a special coupling circuit and feedback. Its output can...

  2023-03-18【Archive】

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• The SD card is broken, can it be fixed this way?

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  Many modern NAND flash devices now use a new architecture that integrates interface, controller, and memory chip into a common ceramic layer. We call it monolithic packaging. Until recently, all memory cards such as SD, Sony M...

  2023-03-18【Archive】

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• Do you know why k is lower case for kV voltage?

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  Why is k for kV in lower case? Units of measurement in international standards are usually written in lowercase letters. Only when referring to units named after names such as volt V, ampere A, kelvin K, watt, watts, etc. name...

  2023-03-18【Archive】

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• Common Mistakes of Electronics Engineers

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  Myth 1. Cost savings Common mistake #1.What color should I choose for bar indicator? Personally, I like blue better, just choose it. A positive decision. Red, green, yellow and orange indicator lights available on market, regardl...

  2023-03-18【Archive】

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• What is difference between synchronous rectification and non-synchronous rectification?

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  The switching power supply is designed to charge inductor when power tube is turned on, and inductor accumulates energy; when power tube is turned off, inductor releases energy, thereby realizing voltage conversion. When power...

  2023-03-18【Archive】

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• Can a PCB trace angle be 90 degrees?

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  Now whenever you open PCB layout manual of original SoC factory, it will mention high speed signal routing angle, and it will say that the high speed signal should not be directed at a right angle, but at a 45 degree angle a round...

  2023-03-18【Archive】

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• "Jingzhen" stroked you: "Do you know how I work?"

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  Crystal oscillators can be seen all over PCB. While processor is in use, there must be a crystal oscillator. Even if there is no external crystal oscillator, there is a crystal oscillator inside chip. 1. Overview of crystal osci...

  2023-03-18【Archive】

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• Explain in detail difference and application of two-three-four-wire system.

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  A 220 VAC instrument must be a four-wire system A four-wire signal device means that power circuit and signal circuit are independent, separated by an isolating circuit, and used to isolate a standard 4-20mA signal. So signal must...

  2023-03-18【Archive】

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• One Article for Understanding PFC (Power Factor Correction)

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  What is Power Factor Correction? What is power factor correction? Power factor correction. In 1950s, improvements were made to eliminate inefficiency in powering AC devices with inductive loads due to phase mismatch between volta...

  2023-03-18【Archive】

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• What is difference between stepper/brush/brushless motors? remember this list

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  When designing equipment that uses electric motors, it is of course necessary to choose motor that is best suited for job required. This article compares features, performance and characteristics of brushed, stepper and brushless...

  2023-03-18【Archive】

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