116 - Blogs - Shenzhen Slkor Micro Semicon Co., Ltd.

RS-485 bus, this article is very detailed

What does RS mean in the past and present RS-485? It is the abbreviation of recomdynded standard, which means recommended standards. 485 is the standard identification number. As for why this identification number is determined, there is no need to study. RS-485, also known as ANSI/TIA/EIA-485, these prefixes are the abbreviations of the standard association. For example, EIA is the abbreviation of Electronics Industries Association EIA. In 1983, the RS-485 communication interface was an Electronics Industries Association
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Detailed explanation of diode limited amplitude circuit and clamp circuit

The most important feature of the diode is one -way conductivity. Using this feature can design a lot of fun and practical circuits. This article mainly describes the limited amplitude circuit and clamp circuit. When the catalog of this article is half a week and the voltage of VIN is greater than equal to 0.7V, the diode is turned on and VOUT will be clamped at 0.7V. When the negative half week and VIN voltage are less than 0.7V, the diode is deadline, so Vout \u003d vin, that is, VOUT waveform follows VIN waveform.
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Introduce the H bridge motor drive circuit

What is the name of the H bridge because the circuit grows like a letter H, usually it contains four independent switching components, for example, there are four MOSFET switching components Q1, Q2, Q3, Q4. They are usually used to drive large loads, such as motors. There is a DC motor M in the middle of the H bridge circuit. D1, D2, D3, and D4 are the renewal diode of MOS-FET; under the switch status, taking a DC motor as an example, the several types of switching status of the H bridge are briefly introduced. In the direction, it can be divided according to the actual project. Positive rotation usually uses the H bridge to drive the emotional load. Here
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How is the negative voltage commonly used in single -chip microcomputer generated?

The principle of negative voltage generation circuit diagram often needs negative voltage in electronic circuits. For example, when we use op amp, we often need to establish a negative voltage. The following is simply taking a positive 5V voltage to a negative voltage 5V as an example to talk about its circuit. Generally, a special negative pressure is used to generate chips when negative voltage, but these chips are more expensive, such as ICL7600, LT1054, etc. I almost forgot MC34063. This chip has used the most. I do n’t say about the negative pressure generated circuit of 34063, there are in DataSheet. Let ’s see the two negative voltage generated circuits commonly used in single -chip electronic circuits. Many of the single -chip machines now have PWM
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The reliability and application of the SIC power device of Zhanxin Core Electronic Analysis

The advantages can better meet the development requirements of future power and electronic technology. After three years of in -depth research and development and hard work, Shanghai Zhanzhan Electronics has become the first company in China to master the 6 -inch SIC MOSFET and SBD technology, as well as SIC MOSFET driving chips. This article explains the reliability and application of the core electronic SIC power device, so that users can rest assured and use it in use, so as to make better products. 1. SIC of Shanghai Core Electronics
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The strongest chip industry chain science, chip independent controllable in -depth analysis (2)

The strongest chip industry chain science is connected, and the chip autonomous controllable in -depth analysis (1) The etching of the etching machine is the process of removing unnecessary materials on the wafer surface. The etching process is located after the light carvings. The light carvings use the light to copy the circuit structure on the mask to the silicon wafer. The etching machine replicates the circuit structure on the silicon wafer for micro -carving. According to the etching process, it is divided into dry etching and wet etching. The drying of the dry method mainly uses the reaction gas and the plasma to etch. Essence Drying method is occupied in semiconductor etching
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The strongest chip industry chain science, chip independent controllable in -depth analysis (1)

If someone tells you, "Hi, the chip I made is 100%autonomous and controllable!" Wait, you will not rush to worship (believe) him, please read this article ... First of all, what is autonomous autonomy? The controlled and most intuitive understanding is that when others are "stuck The integrated circuit industry is usually divided into three major areas: chip design, chip manufacturing, and packaging testing. See the following figure: We analyze it one by one. The chip design is mainly analyzed from three aspects: EDA, IP, and design. Analysis of the three aspects of materials; the packaging test is analyzed from several aspects of packaging design, product packaging and chip testing. 01 chip design
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The cold thinking behind the "gimmick theory"

Recently, the article from Professor Chen Yongzhen of Liaoning University of Technology, "Nitride 镓 FET use electrolytic capacitors is just a gimmick?" Small, when the manufacturing process has no essential changes, its parasitic inductance cannot be significantly reduced, and it has an inductive characteristics at a high switching frequency, and the high harmonic waves are quite abundant. Therefore, there is no need to such an electrolytic container. Indeed, at the time of the new generation of innovative technology, it will always go down. However, the flaws are not covered, and with the progress of the supporting technology around the new technology, its role will also become more and more, and this is the case for nitride power devices. Let's see recently
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What is the IGBT turnover process? (Lecture 1)

The IGBT may not be familiar with the IGBT. The full name of the insulated grid bipolar transistor (Insulated Gate Bipolar Transistor) is a composite full -control of MOS (insulating grid field effect tube) and BJT (bipolar crystal tube) The "CPU , Industrial Energy Conservation, Electric Vehicles and New Energy Equipment are extremely widely used. But do you really know IGBT? Today we will discuss the cutting process of IGBT. Before the beginning, throw a problem
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MOSFET gate drive circuit, how many have you used?

Have you ever used the four common MOS grille drive circuits today? 1. The direct drive of the IC direct drive type is the most common and simplest driver. Figure 1 IC directly drives the MOS gate to use this method. We should pay attention to several parameters and its influence. First check the power IC manual to understand the maximum peak driving current, because different IC chips have different driving capabilities. Secondly, check the parasitic capacitors of MOSFET, as shown in the figure in the figure, C1, C2, and C3. If the capacity is large, the energy required for the MOS tube is relatively large. If the power IC does not have enough peak driving current, the transistor will be compared with
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