LM637CJ

The power supply used in the digital camera is to generate the required power supply voltage from 2 to 4 batteries, including 5V, 3.3V, 18V and - 10V. The circuit is shown in Figure 1. This circuit uses the LT1308 battery to generate four voltages required by the digital camera: 5V (175mA), 3.3V (175mA), 18V (10mA) and - 10V (10mA), of which 18V and - 10V voltages are used for CCD bias. The LT1308 in the figure is a micro power, fixed frequency (600kHz) boost DC/DC converter. It can be separated from single lithium ion [Detailed]

DMA is explained in the chapter "DMA - Direct Storage Area Access" of Fieldfire's "STM32 Library Development Practice" P195-P215. Each data stream of DMAFIFO has four levels of 32-bit FIFO independently. DMA transmission has FIFO mode and direct transmission mode. FIFO is used to temporarily store data between source data transmission and target address. DMA transfer mode DMA2 supports all three transfer modes, while DMA1 only has two modes: peripheral to memory and memory to peripheral. The storage area side of DMA1 [Detailed]

The OPPOReno9 series image configuration was announced. On November 21, the dual core portrait computing engine was upgraded for the first time. The new OPPOReno9 series image configuration was officially announced. At the same time, OPPO released several groups of portrait comparison samples, which fully demonstrated the strong strength of the dual core portrait computing engine. The core configuration of the Reno9 series image OPPO officially announced that the Reno9 series will continue to be equipped with the special NPU chip for OPPO self-developed images - Mariana ®MariSiliconX。 Mariana ® MariSiliconX as Move [Detailed]

On August 4, Zhixi reported that, according to Nikkei Asia, Apple is looking for more Chinese suppliers for the follow-up new iPhone products. At present, the leading players of the sub track of the mainland enterprises, such as Lixun Precision, Lansi Technology, Sunny Optics, Gol Acoustics, Wentai Technology, etc., will supply core parts or provide OEM production services for this year's iPhone 13 series phones, Apple's supply chain may usher in a "big reshuffle". Previously, the industry said that Sunny Optics might enter Apple's supply chain. This time, Nikkei Asia "hammered" this rumor, and Sunny Optics will become an iPhone [Detailed]

1、 The generation of power supply ripple Our common power supplies are linear power supply and switching power supply. Their output DC voltage is obtained from the AC voltage after rectification, filtering and voltage stabilization. Because the filtering is not clean, clutter signals containing periodic and random components will be attached to the DC level, which results in ripple. Under the condition of rated output voltage and current, the peak value of AC voltage in the output DC voltage is commonly referred to as ripple voltage. Ripple is a complex clutter signal. It is a periodic signal that fluctuates up and down around the output DC voltage, but the period and amplitude are not fixed values, but change with time [Detailed]

Related concepts Interrupt source: the event that caused the interrupt Interrupt request: the interrupt source requests the CPU for processing Break point: the pause point of the interrupted program when an interrupt occurs Interrupt response: the process in which the CPU pauses the current program to respond to the interrupt request Interrupt handler: the program that processes the interrupt source Interrupt processing: the CPU executes the relevant interrupt handler Interrupt return: the process of returning the breakpoint The difference between program interrupt and subroutine call is somewhat similar, but they are different concepts. Source is different. Interrupts are generated by external interrupt sources and have unpredictable [Detailed]

On April 5, Shunluo Electronics released the performance forecast for the first quarter, saying that the company realized a net profit attributable to shareholders of listed companies of 184.5 million yuan - 198.387 million yuan, an increase of 95% - 110% year on year. It is known to the industry that the first quarter of each year was a traditional slack season in history, but this year's first quarter of Shunluo Electronics maintained the trend of continuous and rapid development since the second quarter of last year. The supply of products fell short of demand. The sales revenue and net profit of a single quarter for four consecutive quarters hit a record high, and the first quarter of this year created the fastest year-on-year growth rate of a single quarter since the company was listed. About the main reasons for the company's sustained and rapid growth [Detailed]

Analog machine learning IC expert Aspinity is working with Infineon to combine Aspinity's reconfigurable analog modular processing (RAMP) technology with Infineon's XENSIVTM sensor series. Aspinity's RAMP chip is an analog machine learning chip, which can analyze the original, unstructured analog sensor data to determine which data is important at the beginning of the signal chain, thus introducing an architecture method for system design, which can save a lot of power consumption in terminal devices. RAMP chip functions like an intelligent gateway [Detailed]

What is PMU (PMIC)? PMU (power management unit) is a power management unit. It is a highly integrated power management solution for portable applications, that is, several traditional discrete power management chips, such as low dropout linear regulator (LDO), DC/DC converter (DC/DC), are now integrated into the power management unit (PMU) of mobile phones, This can achieve higher power conversion efficiency and lower power consumption, and fewer components can adapt to the reduced board level space with lower cost. PMU as [Detailed]

The MAX9985 high linearity, dual channel down conversion mixer has about 6dB gain,+28.5dBmIIP3 and 10.5dB noise figure (NF), which is ideal for diversity receiver applications. The mixer has a RF frequency range of 700MHz to 1000MHz and a LO frequency range of 570MHz to 865MHz, which is very suitable for low side LO injection reception structures. In addition, the wide frequency range makes MAX9985 very suitable for GSM850/950, 2G/2.5GEDGE, WCDMA, cdma2000 ® [Detailed]

This spring, ChoJun ho, president of LG Electronics, revealed that they would launch a super flagship phone in the second half of the year, named G4Pro according to the convention, but there has been no further information since then. However, today, South Korean media reported that some specifications of this G4Pro: 5.8 inch 2KIPS screen, 4GBLPDR4RAM, and dual rear camera, which are extremely powerful.   It is rumored that taking pictures will be the main selling point of this new machine, which is known as the ultimate Samsung [Detailed]

There are eight precautions when measuring the voltage with a multimeter. The internal resistance of the meter must be clear and must be monitored. The circuit meters under test are connected in parallel, and the range cannot be changed when electrified. When measuring DC voltage, find out the positive and negative poles of the circuit. Measure the voltage of inductive reactance circuit, and do not cut off the power supply during this period. Special probe wire shall be used for testing kilovolt high voltage. The induced voltage to the ground has a large difference between different ranges [Detailed]

With the rapid development of the GPS industry, many brands have emerged in the fierce competition. These familiar GPS brands have appeared on the stage in the media and their respective channels. In fact, behind large and small brands, the biggest support is the GPS solution company. GPS Solution Company has mastered the core technology of GPS products and provides brand manufacturers with a package of solutions including motherboard and UI menu. In a sense, GPS solution companies control the development of the entire industry. Of course, the development of chip companies has given birth to a number of solution companies [Detailed]

A few days ago, Keshenxun System Company launched a new series of audio SoC solutions for embedded audio and voice applications. CX2070XSoC targets the growing audio applications such as multimedia IP phones, personal navigation devices, portable media players and mobile Internet devices. Other applications include MP3 player base system, PC speaker system, audio headset and unified communication system, supporting services such as VoIP phone, telephone speaker and audio conference function. The highly integrated SoC can also be used to realize interphone and interphone doorbell applications. New audio solution [Detailed]

On March 28, Youbixuan (9880. HK), the "first humanoid robot stock", which had driven the concept stock market with its own strength and soared 200% in two days, handed over its first answer after listing. After the release of Ubisoft's 2023 annual performance report, as of the closing of March 28 (Easter closed on the day of writing), the share price of Ubisoft was HK $226.20, up 17.57% year on year, with a total market value of HK $94.584 billion. In the wave of artificial intelligence industry, this financial report, which has attracted the attention of the capital market and people inside and outside the industry, is an excellent way to explore the landing of humanoid robots [Detailed]

LLC resonant converter is a soft switching topology that allows the main power switch to switch at zero voltage, significantly reducing switching loss, and significantly improving power efficiency. In this topology, in order to realize ZVS switching, the parasitic diode of the power switch must have a very short reverse recovery time. If the body diode cannot recover all carriers, hard switching operation may occur during the load change from low to high, and the parasitic bipolar transistor may be turned on. In the consumer application markets such as telecom equipment power supply, large computer/server, electric welding machine, steel cutting machine, etc [Detailed]

In the past days, Arm server chip has made three attempts. The first attempt was represented by Calxeda, AppliedMicro, AMD, Marvell, Nvidia and Samsung, but their final results were disappointing. The second wave was driven by Broadcom, Cavium, Qualcomm and Nuvia, with similar results. With the development of large-scale manufacturers and cloud builders (Amazon Web Services, Microsoft, Google, Alibaba and Tencent) as well as some independent chip design companies (mainly AmpereCom [Detailed]

Source: Lei Keji Digital 3C Group Editor: TSknight has made rapid progress in flash memory chip and other fields since it began to increase investment in the semiconductor field in China a few years ago, although its development in chip, photolithography and other top fields is still slow (limited by patent and technology accumulation, it can't be achieved overnight). Semiconductor manufacturers such as Changjiang Storage and Unisplendor Storage have successively completed the localization and commercialization of flash memory chips, and compared with the products of world-class flash memory manufacturers, they are not far behind, which is impressive. Familiarize yourself with DI [Detailed]

ChrisAllexandre SeniorVicePresident,CSMOandHeadoftheGlobalSalesandMarketingU... [Detailed]

At the beginning of 2024, the price competition in the automobile market will become increasingly fierce. Many brands have launched price reduction strategies, and the degree of "involution" among automobile enterprises is amazing. At the same time, the automotive electronics industry is in a stage of rapid development, with new technologies emerging and application scenarios expanding. In 2024, the following ten trends deserve attention: ... [Detailed]

With the development of semiconductor manufacturing towards more advanced and refined direction, the boundaries of different node ranges and players become more and more obvious. Among them, only TSMC, Samsung and Intel are the most advanced process players. In terms of mature process, it was also mentioned by the industry in recent years. In the early years, especially before 14nm mass production, the difference between advanced process and mature process was not as big as today. Especially in the field of logic chip production, the characteristics of manufacturers focusing on mature process are becoming more prominent. According to the statistics and forecasts of ICInsights, all kinds of half [Detailed]

Any semiconductor enterprise basically starts from a single product, either doing fine and deep, or doing wide and wide. While ASML, a lithography giant, is able to maintain its foothold by relying on lithography alone, TI needs to develop hundreds of thousands of product categories to win less than 20% of the global market. The development paths of different fields are different. For domestic chip manufacturers, they are now entering a new era from weak to strong. Previously, they started from single products and made a breakthrough in the "narrow" field; Now, they not only begin to expand their product lines through mergers and acquisitions with their own assets, but also through self research [Detailed]

On August 24, 2017, Ren Zhengfei, president of Huawei, put forward his expectations and requirements for procurement work and procurement personnel during a discussion with Huawei's procurement cadres. As for supply chain management, Ren Zhengfei proposed: 1. To form strategic depth, don't just focus on details such as supplier negotiations; 2. Improve planning; 3. Strengthening risk management and ensuring supply safety is the first priority, regardless of temporary reserve costs; 4. Establish strategic partnership with the best suppliers. For procurement personnel, Ren Zhengfei proposed: 1, to [Detailed]

Driven by various factors such as the deepening of mobile Internet applications, the accelerated take-off of the digital economy and the improvement of government public security, a new big blue ocean market - indoor positioning market is about to break out! Just from the perspective of online takeout users, China's online takeout users reached 358 million in 2018, exceeded 400 million in 2019, and the scale exceeded 280 billion yuan. In addition, the traditional catering, supermarket, leisure and entertainment industries have also started O2O mode, relying on urban business centers, public accounts, small programs and other service platforms to provide their own products, and in terms of enterprise applications, wisdom [Detailed]

Should · News should · News | Timely push the latest news of Applied Materials in the world and China. To help you fully understand the latest information about Applied Materials' products, technologies, services, financial reports, etc. The application materials company's Producer platform has shipped up to 5000 sets. At present, almost all computer chips in the world use Producer ® Since the Producer platform was launched 20 years ago [Detailed]

[Hero Posts] From the perspective of controller hardware, JD, the ideal car, works in Shanghai. We are looking forward to your participation. Interested direct QR code connection ... [Detailed]

QA&Q: Dimming type of LED driver Common dimming type of LED driver in the market: analog dimming analog dimming is usually called "0-10V dimming". This dimming type uses a linear potentiometer or a wall slide potentiometer (such as Leviton IP710) to control brightness. In a two-wire dimming system configuration, one driver dimming has a 10 volt output and the other is a return line. The potentiometer will change between the two wires in the range of 0V to 10V [Detailed]

Author: Paul Webb, Global Product Manager of TEConnectivity DEUTSCH Racing Series Connectors Racing engineers always hope that the solution can overturn the laws of physics, which also brings challenges to the industry. In essence, motorsport is not a stagnant industry; Just when you think you know everything that is happening at the moment, a new technology suddenly appears, and the whole industry may stride forward quickly. Motorsport has brought many highlights to the world, including disc brakes, active suspension [Detailed]

Digi Key e-recruitment welcome to join us! Digi KeyElectronics is one of the fastest growing distributors of electronic components in the world. Since its establishment in 1972, Dejie Electronics has been committed to providing customers with the widest selection of electronic components in stock, providing customers with the best service, and assisting engineers in the whole design process from prototype to production. This makes the product availability [Detailed]

Click the blue "One mouthful of Linux" at the top left, and select "Set as a star" to see the dry goods article for the first time ≮ [Dry goods] Learning route for embedded driver engineers ∨ [Dry goods] Linux embedded knowledge points - mind map - free access to ∨ [Employment] A comprehensive project based on the Linux Internet of Things that can be written into a resume ∨ [Employment] Job search resume template 1 Memory (DRAM RandomAcc [Detailed]