Wednesday, February 7, 2018

IDC: Tablet PC shipments worldwide dropped by 13 quarters

Market research firm IDC released data show that the global tablet PC market has 13 consecutive quarters of landslide. Some analysts said that the sharp decline in shipments of tablets are mainly due to the market is saturated, the product life cycle is long and alternative products increased.
Data show that in the fourth quarter of 2017, the global tablet shipments of 49.6 million units, down from the previous year's 53.8 million units 7.9%, the only good news is that the decline did not reach double digits, lower than in 2016. IDC calculated in the statistics of the traditional Tablet PC, as well as screen and keyboard separable variants. In the fourth quarter of 2017, Apple still occupies the market first, while Amazon surpassed Samsung for the first time in second place. The top five vendors have a market share of 69.6%, up from 61.3% in the same period of last year. bsm150gt120dn2
Apple's shipments were basically unchanged from the previous year. However, due to the poor performance of other tablets, Apple experienced another 2.3% increase in market share after two quarters of increase. Prior to this, the apple market share has dropped for 13 consecutive quarters. With a lower price iPad and an upgraded version of the iPad Pro, Apple maintained its market leadership.
In the fourth quarter of 2017, Amazon's tablet shipments increased by 2.5 million units, with a 6% increase in market share. The holiday season is usually the strongest quarter for the performance of Amazon, but this year's performance is particularly prominent, and the company surpassed Samsung in one fell swoop. IDC said it is due to Amazon offers a substantial discount, as well as the latest Amazon tablet integrated Alexa voice assistant. mg100q2ys42
Samsung's tablet shipments fell 1 million units year on year. IDC data shows that the proportion of detachable keyboards and screens in Samsung's tablet devices has increased, but such growth has not been able to make up for the decline of traditional tablets.
In addition, Huawei ranked fourth over Lenovo. Huawei's market share rose 1.2%, Lenovo fell 0.4%. Both companies shipped about 3 million units.
The rise of the Tablet PC is a coincidence, in the iOS and Android system victory over Saipan system, Apple released iPad running iOS, Andrews camp tablet products are rapidly mushroomed, 2011-2014 is the Tablet PC Rapid growth phase.
Among them, iPad in the tablet PC market has always maintained a dominant position, Android camp wins in the brand many, occupy the other half. In the battle between Android and iOS two camps intensified market, Windows 8 and 10 completed a perfect counter-attack, the three systems officially formed a strong situation.
Insiders pointed out that in the year 2017, the tablet PC market has shown such a trend, so the fourth quarter of the data is not surprising. In other words, the refreshment cycle of tablets is closer to that of traditional PCs, not smartphones, and this is the only category that has seen growth.
IDC analyst Jetsh Ublaney said: "So far, the keyboard and the screen can be detached deformation of the market thanks to the development of Microsoft and Apple in the United States product sales.However, this category can continue to be successful Depends on whether other PC makers are willing to join, more importantly, whether the user in other countries can accept this new type of product. "
However, from the current flat-panel market situation, manufacturers seem to have found a good way - specialization. Unlike the notebook market segmentation, Tablet PC specialization to be relatively simple. At present, Tablet PC products are divided into: adhere to the audio and video entertainment line; take the education line; take handwriting, painting, design line, support stylus.

Wednesday, February 22, 2017

For the Moore Law continued life: in the computer chip wiring by adding graphene

With the increasing size of the integrated circuit, the current fate of Moore's Law seems to be mostly focused on the improvement of silicon transistors. However, there are gradually researchers starting to start from other components: for example, connect the various transistors to form a complex circuit of copper. And graphene in which played a key role. lm3s9d90-iqc80-a1
In order to improve performance, integrated circuit density continues to increase, and in the same area of ​​the chip which plugged into more transistors, it means that more lines need to connect them. In 2000, the first group of copper interconnects was produced, with 1 km of copper per square centimeter; but today's 14 nm node processors were able to contain 10 km of copper in the same area.
Now the more sophisticated the chip, the copper wire becomes thinner, the resistance also increases, but has to carry more current to speed up the switching speed, improve performance, so will produce electromigration (Electromigration) phenomenon. The electrons of the copper wire will transfer the kinetic energy to the metal ions, so that the ions move toward the electric field in the opposite direction and gradually migrate, resulting in the diffusion and loss of the atoms of the copper wire, resulting in a short circuit.
The current solution is to set the copper wire in the trenches, and the inner walls of the trenches cover tantalum nitride with a thickness of 2 nm, which prevents the escape of copper. But this way top up to 10 nm and 7 nm nodes. As the process continues to shrink, the inner wall of 2 nm will become too thick. s50240
At the IEEE International Conference on Electronic Equipment, held in San Francisco last December, H.-S. Philip Wong from Stanford's electrical engineer and his team found that polystyrene was used to solve the problem of electromigration Phenomenon, and reduce the resistance. Wong said that although researchers have already studied other linings that may block electromigration, including ruthenium and magnesium, graphene can be thinner than any material. In addition, the semiconductor industry in fact try to avoid looking for new materials to spend too much time, but now the situation, if the copper life can no longer continue, you must use new materials (such as cobalt) to replace.
Stanford's team is currently working with Lam Research Corp. and Zhejiang University in China to test composite material routing to allow graphene to be produced online from copper. Corning has developed a special manufacturing method, will not damage the rest of the chip at the temperature (below 400 ℃), this coating of graphene composite material to suppress the effect of electromigration is the general copper 10 times , And only half the resistance.
Moore's Law to go on, in addition to the transistor, the potential is even the memory, lines and so have to join the ranks of improvement, and the role of graphene or will be more eaten.

Wednesday, February 8, 2017

TI introduces the industry's first zero-drift, zero-crossing operational amplifiers to achieve true high accuracy

Texas Instruments Incorporated (TI) (NYSE: TXN) today introduced its first op amp with zero-drift and zero-crossing technology to set the standard for precision amplifiers. The OPA388 op amp maintains high accuracy over the entire input range and is suitable for a wide range of industrial applications, including test and measurement, medical and safety equipment, and high-resolution data acquisition systems.
The unique architecture of the OPA388 enables industry-leading combinations of ultra-high input linearity and accuracy. TI's zero-drift technology eliminates temperature drift and flicker noise for maximum dc accuracy and dynamic error correction, and its zero-cross topology eliminates offset errors caused by common-mode limits for linear output and true rail-to-rail Input operation. xc17s05pd8i
Key Features and Benefits of the OPA388 Operational Amplifier:
True True Accuracy with Ultra-High Input Linearity: The device's zero-cross topology eliminates the input offset transitions of traditional complementary metal-oxide-semiconductor (CMOS) operational amplifiers to ensure maximum linearity over the entire common-mode input range Degree and minimum distortion.
• Provides high DC accuracy: TI's zero drift technology provides a maximum offset voltage as low as 5μV, typical offset voltage drift of 0.005μV / ° C and a maximum input bias current of 700 pA, and an industrial temperature range of -40 ° C To 125 ° C. Without the need for costly overheating calibration, while increasing the DC accuracy.
Support for wide bandwidth operation: With a 10 MHz gain bandwidth product (GBW), the OPA388 enables high-gain configurations with access to a variety of signal types and frequencies. The OPA388 supports these devices from precision weighing instruments to heart rate monitors.
• High performance and low distortion: -132dBc of ultra-low total harmonic distortion and 7nV / √Hz voltage noise contribute to high-resolution signal chain, suitable for specialized applications, such as programmable logic controllers, precision field transmission And motion control equipment. xc4020xl-3pq160c
Reduced complexity and cost: Zero-drift and zero-crossing techniques reduce the complexity of the signal chain and the number of external components, enabling designers to minimize board space and bill-of-materials (BOM) costs.
Start the design tools and support immediately
TI provides designers of the OPA388 with a range of support tools, including a reference design that demonstrates how to eliminate cross-nonlinearities in digital-to-analog converters using precision op amps. The reference design uses the DAC8830 precision data converter and the REF5050 voltage reference to create an accurate DC calibration system for high-precision applications in wireless infrastructure, test and measurement.

Friday, December 30, 2016

Apple has not admitted iPhone6s battery problem

According to foreign media reports, if you are using the iPhone 6 or iPhone 6s, you may encounter battery problems. The most common situation is that even if the phone shows the battery still has enough power, but the iPhone6 ​​or iPhone 6s may still automatically shut down automatically.
Moreover, this is not a new problem, because the first time earlier this year, users have raised this issue. According to the "Forbes" reported that Apple official forums related information posted, a complaint about non-iPhone 6s models have TV problems post has more than 62 pages of replies, many of which users are said to be upgrading iOS10.2 After the problem, the problem is more obvious after the update, has seriously affected the normal use of the user. ff300r17ke3
Apple officials also launched a limited range of battery replacement items for the iPhone 6s and announced that the software upgrade will help other iPhone models to solve the battery problem. However, from the current situation, the effect of software upgrades seems very limited.
In this regard, "Fortune" magazine editor Jeff - John - Roberts (Jeff John Roberts) that the most annoying thing about this is that Apple refused to clarify where the problem in the end. Moreover, the company has been "pretending" other models do not exist similar problems, but only for some iPhone6s models start a limited range of battery replacement project.
It is reported that Roberts had their own iPhone 6 battery problems encountered, and "Fortune" magazine at least five employees of the iPhone 6 also encountered a similar problem. Roberts revealed that he learned that Apple retail store employees will provide users with an unusual solution, that Apple can re-install the firmware to the iPhone 6 in question, but this method may lead to the loss of important data, including short message content . cm1000ha-24h
Apple officially issued a formal statement to the Fortune magazine, although Apple in the statement written in a lot of text, but always evasive does not directly recognize the safety of its equipment battery, Apple's statement reads as follows:
We always work hard and are committed to providing the best products, user experience and customer support. We believe that this is the Apple user satisfaction in China and the world smartphone manufacturers have been the leading reason.
We have been very serious about customer complaints, including a limited number of iPhone abnormal shutdown. We also need to thank the media for conveying this issue to us. In the face of these problems, we will launch a formal investigation, and will carry out a detailed analysis of the involved equipment. When we find the problem, Apple will provide users with possible solutions.
Company survey found that in September 2015 and October during the production of a small amount of iPhone 6s used in the manufacturing process with too much outside air mixed with the battery parts. Two weeks ago, we launched a free replacement project for affected batteries around the world. Once again, we apologize for the inconvenience this has caused to users, but it must be noted that this is not a security issue.
At the same time, there are a small number of models not affected by the list of users also reflect their own equipment there is the problem of automatic shutdown, it is because some models will be in normal use for the purpose of protecting the device circuit components automatically shut down. To gather more information on this issue, we will have an additional diagnostic feature built into the iOS software update expected next week. By collecting this information, we can improve the algorithm used to manage battery performance and shutdown. And if this improvement proved to be feasible, we will be added to the future of the software update push.

Monday, December 12, 2016

KIT researches multi-core processors for automotive and industrial applications

Safety-critical applications in automotive, aviation and industry 4.0 will require a significant increase in digital computing performance. This can be provided via Multicore technologies. The ARAMiS II project, developed at the KIT, aims to increase safety, efficiency and comfort by using multicore technologies in vehicles, aircraft and production facilities.
The demand for digital computing performance is increasing enormously, among other things by highly automated vehicles and real-time networked machines, but also by the increasing integration and interaction with other products and services. The use of Multicore technologies significantly increases the computing power of embedded systems in vehicles, aircraft or industrial plants. Multicore processors have multiple processor cores that must work in parallel. This can increase the computing power enormously, but the development is more complex for several processor cores - for example, when it comes to timing or critical point critical requirements. 7101j52zqe22
Multicore processors are now used successfully in many applications, such as PCs, tablets and smartphones. However, safety-critical applications in mobility and industry require additional complex requirements, which is why multi-core systems have hardly become established in industrial embedded applications or in the automotive industry. The requirements for strict safety certifications have so far hardly been met by these building blocks .
"In the new ARAMiS II project, we are creating the indispensable methodological prerequisites to increase safety, efficiency and comfort in the use of multicore technologies and make them industrially available. The results of ARAMiS II are supplemented by standardization activities of the domains concerned and are thus made available to other industry partners. "Says Professor Jürgen Becker, spokesman of the institute management of the Institute for Information Technology (ITIV) of the KIT and together with Falco Bapp of the ITIV coordinator of ARAMiS II. 7201k2zge
In its predecessor, the ARAMiS project, KIT has successfully demonstrated with numerous partners from research and industry that multicore technologies can be used and integrated in safety-critical applications. Based on this, ARAMiS II is to develop, develop and optimize the efficient development processes, especially the systematic tool chain and the industrial platforms with the necessary methods, for the reliable use of multicore architectures. Demonstrators in the domains of automotive engineering, aerospace and industrial automation should demonstrate the applicability of the developed concepts and methods across all domains.
In a kick-off meeting on 1 and 2 December 2016, all partners identified the next activities in the six subprojects: applications and requirements, structured multicore development, multicore methods and tools, multicore platforms, and architectural patterns , Implementation and evaluation, results assurance and utilization.
The consortium of ARAMiS II consists of 33 partners. In addition to renowned research facilities, leading manufacturers from the automotive and aerospace industries as well as the industrial sector as well as various suppliers, software and tool manufacturers are participating. Continental, for example, is an industry spokesman in ARAMiS II, Audi, Bosch, Airbus and Siemens.
Like its predecessor, ARAMiS II has been designed for three years; The project volume totals more than 26 million euros. ARAMiS II is funded by the Federal Ministry of Education and Research (BMBF) with around 15 million euros.

Wednesday, November 16, 2016

Chip industry turnover of over 240 billion US dollars within two years

After a series of mergers and acquisitions, the chip industry, traders have to take a break, and the market for them to choose high-quality transactions are not many.
In the past two years, semiconductor companies have completed more than $ 240 billion in mergers and acquisitions, according to Dealogic, a financial data provider. So far this year, the semiconductor industry M & A transaction size of 130.2 billion US dollars, setting a new record, higher than last year's record 16% higher. Large transactions led to the overall transaction volume, but this is not a small transaction. Over the past two years, six deals have exceeded $ 10 billion and three have exceeded $ 30 billion.
Why is the M & A deal in the chip industry slowing? The reason is simple: there are not many high-quality chip companies available in the market, and most of the companies that want to buy have completed their own deals. Qualcomm took out most of its $ 30 billion in cash reserves to fund the acquisition of NXP Semiconductors. Broadcom has completed a $ 37 billion merger with Avago Technologies earlier this year and has invested another $ 5.5 billion to acquire the network equipment company Brocade Communications Systems. According to financial information provider FactSet, Intel spent more than $ 15 billion last year on acquiring Altera, and then acquired or planned to acquire 12 smaller companies. 50yxf100mce8x11.5
This year's chip industry mergers and acquisitions scale set a new record
Regulatory opposition is another factor restricting chip industry M & A transactions, at least in the chip manufacturing equipment segment of the field is the case. Wafer-equipment makers Lam Research and KLA-Tencor canceled a $ 10.6 billion merger last month after a rigorous review by the US Department of Justice. Applied Materials last year to try to $ 29 billion merger with Tokyo Electronics, but also by the United States Department of Justice of the opposition. Regulatory objections may discourage other chip companies from pursuing larger-scale deals.
Price is also an obstacle, the performance of chip stocks far better than other technology industry stocks. So far this year, the Philadelphia Semiconductor Index has risen more than 25%, while the Nasdaq Composite Index rose only 4%. Nvidia and AMD are often rumored to buy, with the growth rate of growth this year, the two companies' share price has more than doubled. 6437288-2
But chip companies will continue to look for ways to drive growth in low interest rates. Technology companies will be more interested in the automotive field, which acquired from Qualcomm NXP, Samsung 8 billion US dollars acquisition of Harman International can be seen.
A handful of chip companies are not involved in the recent takeover binge. Over the past two years, Nvidia has only acquired a small company, currently sitting on about 3.7 billion US dollars in net cash. Texas Instruments is currently the fourth-largest chip company, since 2011 to $ 6.5 billion acquisition of National Semiconductor, Texas Instruments has never had a deal.
However, these companies will also carefully selected acquisition targets. Texas Instruments CFO in September this year, said at the Investment Conference, the company mainly in the autonomous areas in the next four to five years to bring value-added transactions. In the recent acquisition of frequent transactions, the choice of Texas Instruments less and less.

Sunday, October 30, 2016

Three-layer electrode structure design to improve the energy density of lithium batteries 30%

Yang Yuan, an assistant professor at Columbia University's School of Materials Science and Engineering, has developed a new approach to increasing the energy density of lithium-ion batteries. His three-layer structure of electrodes in the bare air environment to maintain stability, thus making the battery more durable, further reduce the manufacturing cost. The study can increase the energy density of lithium batteries 10-30%, related papers published in early October in the "Nano Letters" periodicals.
Graphite / PMMA / Li three-layer electrode in a battery electrolyte for 24 hours before (left) and after (right). Prior to immersion in the electrolyte, the three-layer electrode is stable in air. After soaking, lithium and graphite reaction, the color turns yellow. Source: Columbia University
"When lithium batteries are charged for the first time, they lose as much as 5-20% of their energy in the first cycle," Yang said. "We have been able to avoid this loss through structural improvements. The approach has great potential for increasing battery life and is expected to be used in portable electronic devices and electric vehicles. " gmf32024abtw
During the first charge after production, a portion of the electrolyte in the lithium battery will change from a liquid state to a solid state due to a reduction reaction and adhere to the negative electrode of the battery. This process is irreversible and reduces the stored energy of the battery.
In the current electrode manufacturing technology, this process to bring the loss of about 10%, but for high-capacity next-generation anode material, such as silicon, the loss will reach 20-30%, which will greatly reduce the battery Of the actual available capacity.
In order to compensate for such initial loss, the conventional method is to add some lithium-rich material to the electrode. However, since most of these materials are unstable in the air environment, they must be manufactured in dry air, which is completely free from moisture, and therefore, the manufacturing cost of the battery is greatly increased.
Yang Yuan developed the three-electrode structure is to ensure that the electrode can be completed in the ordinary air environment to complete the manufacturing.
First of all, he used a layer of "PMMA" (that is, common plexiglass material), to isolate the lithium and air and moisture contact; PMMA polymer and then add a layer of artificial graphite or silicon nanoparticles and other active materials; He allows the PMMA polymer layer to dissolve in the cell electrolyte, thereby conducting lithium and the electrode material. msp430f436ipzr
"This allows us to avoid the air contact between unstable lithium and lithiated electrodes, which can be done in normal air environments and make it easier to produce battery electrodes," Yang explained.
Three-layer structure of the electrode production process: PMMA in the initial state to ensure that lithium does not react with the moisture in the air. When PMMA is dissolved by the battery electrolyte, the graphite contacts with the lithium to compensate for the initial loss due to the reduction of the electrolyte. Source: Columbia University
Yang's method reduced the loss of the existing graphite electrode from 8% to 0.3% and the loss of the silicon electrode from -13% to -15% (negative indicates that the capacity of the battery was taught as the initial state due to the addition of the new lithium material There is an increase). The excess lithium can compensate for the loss of capacity in the subsequent cycle, and thus the cycle life of the battery can be further enhanced.
Li-ion battery energy density (or capacity) in the past 25 years has maintained an annual growth rate of 5-7%, and Yang Yuan research to further improve the growth rate provides a feasibility program. His team is now working to reduce the thickness of PMMA coating in order to reduce its proportion in lithium batteries lower, and strive to achieve industrial production.
"The three-layer electrode design is cleverly designed to produce lithium metal-containing electrodes under normal air conditions," said Yale Wang, assistant professor of chemistry at Yale University. "The initial coulombic efficiency of the electrode has been a major challenge for the lithium-ion battery industry, This simple and effective compensation technology will cause great interest.