chipmall electronic components

  Zener diode (also called Zener diode) its circuit symbol is: This diode is a semiconductor device with high resistance until the critical reverse breakdown voltage. At this critical breakdown point, the reverse resistance decreases To a very small value, the current increases while the voltage remains constant in this low resistance region. Zener diodes are divided according to the breakdown voltage. Because of this characteristic, the Zener tube is mainly used as a regulator or voltage The reference component is used. Its volt-ampere characteristics are shown in Figure 1. Zener diodes can be connected in series for use at higher voltages, and more stable voltages can be obtained by connecting them in series.   　　 Zener tube application:   1. Surge protection circuit: Zener tube breakdowns under accurate voltage, which makes it can be used as a limiting or protective element. Because Zener diodes of various voltages are available, it is especially suitable for this app...

  Internet rumors that domestic panel supplier BOE will supply OLED screens to Apple iPhone have been around for a long time. Just last week, there were rumors in the industry that BOE's OLED screens  had passed Apple certification.   The domestic panel supplier BOE (BOE) has long been rumored to supply OLED screens to Apple’s iPhone. Just last week, there were rumors in the industry that BOE’s OLED screens have been certified by Apple and started supplying them to Apple in December. OLED screen required for iPhone 12 series. However, BOE did not respond positively to this rumor.   https://cutt.ly/qe963dKW On the 28th, the supply chain gave further confirmation that BOE had officially passed Apple's certification this month and had officially completed the first batch of supplies to Apple before last Sunday. The first batch of supply models mainly include iPhone 12 and iPhone 12 Pro.   According to news from Luotu Technology, the first batch of panels supplied b...

  What is a switching power supply ? What is a switching power supply used for? The switching power supply is a voltage conversion circuit. Its main work content is to increase and decrease pressure. It is widely used in modern electronic products. Because the switching transistor always works in "on" and "off" states, it is called a switching power supply. The switching power supply is essentially an oscillating circuit. This method of converting electrical energy is not only used in power circuits, but also widely used in other circuits, such as LCD backlight circuits, fluorescent lamps, etc. Compared with transformers, switching power supplies have high efficiency, good stability and small size. The disadvantage of the switching power supply is that the power is relatively small, which will cause high-frequency interference to the circuit, and the circuit is complicated and difficult to maintain. There are three control principles of switching power supply:   1.T...

  According to foreign media reports, after mass production of the 5nm process in the first quarter of this year and foundry related chips for Apple and other customers, TSMC ’ s next focus will be on the more advanced 3nm process. The research and development of this process is progressing as planned. , The plant was completed in November.   The 7nm and 5nm processes are the same. The 3nm process that TSMC is planning will also have a second generation, which is what they call the 3nm Plus process.   Foreign media reports show that TSMC has announced that their 3nm Plus process will be launched in 2023, but has not disclosed that it will be launched in the first half or the second half of 2023.   In terms of customers, the English media said that Apple will be the first customer for the 3nm Plus process. Some foreign media also stated in reports that according to time estimates, Apple ’ s main processor in 2023 will be the A17 on the iPhone 15, and the first product...

  Recently, Apple, Microsoft and other giants have launched plans for independent research and development of chips. For example, Apple is focusing on developing 5G baseband chips, while Microsoft is designing Arm-based processor chips for its servers and future Surface devices.   However, people living in China may not know that in markets other than China, the chip industry has been generally regarded as a sunset industry!   After decades of fierce competition, the chip industry has entered a highly monopolistic state. The entire chip industry is controlled by several giants. It is very difficult for other companies to get a share of the market.   For example, X86 chips are basically controlled by Intel, mobile chip architecture is basically ARM's world, finished processors are mainly monopolized by Qualcomm , the analog chip market is the back garden of Texas Instruments, and semiconductor equipment is applied materials and Panlin. The memory is from Samsung, SK H...

  Transparent display technology "competes for beauty"   Although transparent display has received more attention due to OLED, it is not only OLED that can achieve transparent display. LCD , LED, Micro LED , etc. can all achieve a certain degree of transparent display. At present, LCD and LED transparent display products have been widely used in the commercial display field, and the degree of industrialization is much higher than that of OLED transparent display.   Liu Huilian, chief analyst of Omdia, said in an interview with a reporter from "China Electronics News" that LCD adopts special liquid crystal materials and abandons CF and polarizers, which can also greatly increase light transmittance and achieve transparent display. At present, this technology is mostly used in commodity display cabinet screens, refrigerated cabinet screens, fish tank screens, unmanned vending machine screens, etc., and the price is high.   LED transparent screen is currently the most ...

  This year, Xiaomi launched a transparent OLED TV with a higher price, earning gimmicks and a high degree of attention, and also bringing transparent display into the public eye. Compared with TV screens, the industry generally believes that commercial scenes that pursue aesthetics, technology, space, and budget are more suitable for transparent display. https://qrurl.cc/chipmall   In recent years, OLED has become a popular display technology in the global TV field. With the joint promotion and operation of many color TV brands, it has gradually gained a foothold in the high-end TV field. According to data from the research organization Omdia, OLED products will account for 31.5% of the global TV product market of more than US$1,500.   Wu Zhanghao, vice president of LG Display’s TV business unit, said: “LG Display’s transparent OLED screen demonstrates the infinite possibilities of OLED, and its differentiated experience will accelerate the global commercialization of tr...

  Molex , a provider of connectivity and electronic solutions, announced the acquisition of Fiberguide Industries, a manufacturer of customized fiber optic solutions based in Caldwell, Idaho. Fiberguide will join Molex's Polymicro business, a professional optical fiber and fluid product provider based in Phoenix, specifically tailored for medical, industrial and data communication applications.   Provide advanced customer support for medical, industrial and data communication applications, and meet the demand for specialty fibers and finished components through advanced IP and technology.   Molex, a provider of connectivity and electronic solutions, announced the acquisition of Fiberguide Industries, a manufacturer of customized fiber optic solutions based in Caldwell, Idaho. Fiberguide will join Molex's Polymicro business, a professional optical fiber and fluid product provider based in Phoenix, specifically tailored for medical, industrial and data communication applica...

  Now comes the digital-to-analog conversion part. No matter what method you use, the signal transferred  to this part is greatly distorted, so at this stage, modification is necessary. Of course, our modification can't ignore the restoration, so the filter capacitor we can choose at this time can only be rifa. Because RIFA capacitors are relatively easy to find, we can choose products of the same series from large to small. At the same time, you need to match some film capacitors. Using film capacitors in filtering can effectively improve linearity. But film capacitors also have an impact on the sound. For example, the bile smell of rifa capacitors is very rich, but after you use film capacitors, the bile smell will be reduced, and the larger the capacity of the film capacitor, the more bile smell At the same time, the sound level is getting richer and richer.   According to my test situation, after film capacitors are used too much, the treble will be affected to a cert...

  Capacitors  are one of the commonly used electronic components, and friends who are professional in electronics have more or less understanding of capacitors. However, in the process of using capacitors, how do we use a variety of different capacitors together? In order to answer your questions, this article will introduce the matching of capacitors, mainly to introduce the matching of electrolytic capacitors and film capacitors.   In an electrical appliance, especially in CDs, capacitors play a huge role, because in audio equipment, the amount of capacitors is quite large, especially in the middle of CDs, many integrated blocks are necessary and there is almost no choice. , Unlike the amplifier tube in the power amplifier , there are many choices. Therefore, in the cd, once the integrated block is fixed, you can only choose the capacitor and the resistance. Because the resistance has a smaller effect on the sound of the sound than the capacitor Many, so the capacitance...

  The chip makers supplying Apple should now have learned a sufficient lesson, that is, never regard this business as a permanent business. The change may happen in the next second.   Intel is a good example. Apple replaced Intel processors with self-developed chips in its latest Mac computers. Apple's chip dreams make its suppliers miserable, worrying that they will become the next eliminated. And all kinds of news indicate that Qualcomm may become the next candidate to be eliminated.   According to reports, Apple's senior vice president of hardware technology Johny Srouji recently announced that the company is developing its own modem chip. Modem chips are the biggest business between Qualcomm and Apple, and the two companies have recently re-established a cooperative relationship after years of intense legal disputes.   This news caused Qualcomm's stock price to fall by 7% in early trading on Friday, and its market value evaporated by 85 billion yuan overnight. Ot...