Welcome!

News Feed Item

Fujitsu Develops Clock Distribution Circuit for High-Speed, Low-Power Data Transmission between CPUs

Contributes to the next generation of higher performance servers and supercomputers through a 20% reduction in transceiver circuit power consumption

Kawasaki, Japan and Sunnyvale, U.S., June 14, 2013 - (JCN Newswire) - Fujitsu Laboratories Limited and Fujitsu Laboratories of America, Inc. today announced the development of a clock distribution circuit that enables a 20% reduction in the power consumed by the transceiver circuits in next-generation servers that transmit data between CPUs.

In recent years, in order to improve the data processing performance of servers, in addition to improving CPU performance, there has been a need to increase the speeds at which data is transmitted between chips, such as CPUs, in a server system. On the other hand, as speeds have increased, more power is consumed by the clock distribution circuits on the transceiver circuits that transmit the data. Now, by building a tiny oscillator circuit into each transceiver and synchronizing the oscillators, Fujitsu researchers succeeded in developing a low-power clock distribution method that eliminates the need to use conventional clock distribution circuits.

It is expected that this technology will contribute to increasing the performance of the next generation of servers and supercomputers.

Details of this new technology will be presented at the 2013 Symposium on VLSI Circuits, an international conference on semiconductor circuit technology held in Kyoto beginning Tuesday, June 11, 2013 (presentation 19-2).

Background

In recent years, there has been a greater need for improvements in data processing performance for servers employed in datacenters that support cloud computing. This has led to enhancements in CPU performance, as well as the development of large-scale systems that connect large numbers of CPUs. As a result, the amount of data traffic exchanged between CPUs and peripheral devices has grown substantially. To accommodate this high volume of traffic, inter-processor data communications speeds in today's servers have increased from a few Gbps to tens of Gbps. In line with faster speeds, however, power consumption has also increased. For the next generation of high-performance servers, there is an increasing need to couple higher speed with low power consumption.

Technological Challenges

As inter-processor communications speeds have become faster between CPUs and other chips in server systems, the power consumed by transceiver circuits in transmitting the data has also increased. In particular, the proportion of the overall transceiver circuit's power consumption that is attributable to the clock distribution circuit has been growing. To make sure that the clock signal generated by the clock generator circuit is not attenuated and is able to be transmitted to each transceiver circuit, the clock distribution circuit consumes a considerable amount of power because of the relatively high signal amplification that is required over multiple stages. To achieve higher speeds with low power consumption, therefore, what has been needed is to reduce the power consumed by the transceiver circuit by developing a new, low-power clock distribution circuit.

Newly Developed Technology

By building a tiny oscillator circuit into each transceiver and synchronizing the oscillators, Fujitsu researchers succeeded in developing a low-power clock distribution method (figure 3) that eliminates the need to use conventional clock distribution circuits.

All of the reference clocks (oscillator output) are set so that they are synchronized with the clock generator output. As a result, the frequency and phase of the reference clock for each transceiver circuit match the frequency and phase of the clock generator output. Because the signal between each oscillator required for synchronization used less amplification compared to conventional clock signal transmissions, less power is consumed.

In achieving synchronization, a low amplification signal that is proportional to the amplification difference between neighboring oscillators is fed back into each oscillator (figure 4). Because this feedback is designed to drive the amplification difference to zero, ultimately the amplification difference becomes zero and the frequency and phase of the output clock for each oscillator become uniform. All neighboring oscillators are connected, with one connected to the clock generation circuit, meaning the operation of all oscillators is synchronized to the clock generation output. In this way, the generation and transmission of a low amplification differential signal enables the generation of multiple synchronized clocks.

This technology enabled a 75% reduction in the power consumed by the 16 GHz clock distribution circuit, resulting in a 20% reduction in the overall power consumed by the transceiver circuit.

Results

It is anticipated that the application of this technology will make a significant contribution to improving the performance of the next generation of servers and supercomputers.

Future Plans

Fujitsu Laboratories and Fujitsu Laboratories of America will work to apply this technology to product areas related to big data, such as the backplane interfaces that link printed circuit boards together in servers.


About Fujitsu Laboratories

Founded in 1968 as a wholly owned subsidiary of Fujitsu Limited, Fujitsu Laboratories Limited is one of the premier research centers in the world. With a global network of laboratories in Japan, China, the United States and Europe, the organization conducts a wide range of basic and applied research in the areas of Next-generation Services, Computer Servers, Networks, Electronic Devices and Advanced Materials. For more information, please see: http://jp.fujitsu.com/labs/en.

About Fujitsu Laboratories of America

Fujitsu Laboratories of America, Inc. is a wholly owned subsidiary of Fujitsu Laboratories Ltd. (Japan), focusing on research on Internet, interconnect technologies, software development and solutions for several industry verticals. Conducting research in an open environment, it contributes to the global research community and the IT industry. It is headquartered in Sunnyvale, CA. For more information, please see: www.fla.fujitsu.com.

About Fujitsu Limited

Fujitsu is the leading Japanese information and communication technology (ICT) company offering a full range of technology products, solutions and services. Approximately 170,000 Fujitsu people support customers in more than 100 countries. We use our experience and the power of ICT to shape the future of society with our customers. Fujitsu Limited (TSE: 6702) reported consolidated revenues of 4.4 trillion yen (US$47 billion) for the fiscal year ended March 31, 2013 For more information, please see www.fujitsu.com.



Source: Fujitsu Limited

Contact:
Fujitsu Limited
Public and Investor Relations
www.fujitsu.com/global/news/contacts/
+81-3-3215-5259

Technical Contacts:

Fujitsu Laboratories Ltd.
ICT Systems Laboratories
E-mail: [email protected]


Copyright 2013 JCN Newswire. All rights reserved. www.japancorp.net

More Stories By JCN Newswire

Copyright 2008 JCN Newswire. All rights reserved. Republication or redistribution of JCN Newswire content is expressly prohibited without the prior written consent of JCN Newswire. JCN Newswire shall not be liable for any errors or delays in the content, or for any actions taken in reliance thereon.

Latest Stories
SYS-CON Events announced today that Sheng Liang to Keynote at SYS-CON's 19th Cloud Expo, which will take place on November 1-3, 2016 at the Santa Clara Convention Center in Santa Clara, California.
Ask someone to architect an Internet of Things (IoT) solution and you are guaranteed to see a reference to the cloud. This would lead you to believe that IoT requires the cloud to exist. However, there are many IoT use cases where the cloud is not feasible or desirable. In his session at @ThingsExpo, Dave McCarthy, Director of Products at Bsquare Corporation, will discuss the strategies that exist to extend intelligence directly to IoT devices and sensors, freeing them from the constraints of ...
Technology vendors and analysts are eager to paint a rosy picture of how wonderful IoT is and why your deployment will be great with the use of their products and services. While it is easy to showcase successful IoT solutions, identifying IoT systems that missed the mark or failed can often provide more in the way of key lessons learned. In his session at @ThingsExpo, Peter Vanderminden, Principal Industry Analyst for IoT & Digital Supply Chain to Flatiron Strategies, will focus on how IoT de...
Complete Internet of Things (IoT) embedded device security is not just about the device but involves the entire product’s identity, data and control integrity, and services traversing the cloud. A device can no longer be looked at as an island; it is a part of a system. In fact, given the cross-domain interactions enabled by IoT it could be a part of many systems. Also, depending on where the device is deployed, for example, in the office building versus a factory floor or oil field, security ha...
24Notion is full-service global creative digital marketing, technology and lifestyle agency that combines strategic ideas with customized tactical execution. With a broad understand of the art of traditional marketing, new media, communications and social influence, 24Notion uniquely understands how to connect your brand strategy with the right consumer. 24Notion ranked #12 on Corporate Social Responsibility - Book of List.
Businesses are struggling to manage the information flow and interactions between all of these new devices and things jumping on their network, and the apps and IT systems they control. The data businesses gather is only helpful if they can do something with it. In his session at @ThingsExpo, Chris Witeck, Principal Technology Strategist at Citrix, will discuss how different the impact of IoT will be for large businesses, expanding how IoT will allow large organizations to make their legacy ap...
Fact is, enterprises have significant legacy voice infrastructure that’s costly to replace with pure IP solutions. How can we bring this analog infrastructure into our shiny new cloud applications? There are proven methods to bind both legacy voice applications and traditional PSTN audio into cloud-based applications and services at a carrier scale. Some of the most successful implementations leverage WebRTC, WebSockets, SIP and other open source technologies. In his session at @ThingsExpo, Da...
For basic one-to-one voice or video calling solutions, WebRTC has proven to be a very powerful technology. Although WebRTC’s core functionality is to provide secure, real-time p2p media streaming, leveraging native platform features and server-side components brings up new communication capabilities for web and native mobile applications, allowing for advanced multi-user use cases such as video broadcasting, conferencing, and media recording.
What does it look like when you have access to cloud infrastructure and platform under the same roof? Let’s talk about the different layers of Technology as a Service: who cares, what runs where, and how does it all fit together. In his session at 18th Cloud Expo, Phil Jackson, Lead Technology Evangelist at SoftLayer, an IBM company, spoke about the picture being painted by IBM Cloud and how the tools being crafted can help fill the gaps in your IT infrastructure.
SYS-CON Events announced today that Niagara Networks will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Niagara Networks offers the highest port-density systems, and the most complete Next-Generation Network Visibility systems including Network Packet Brokers, Bypass Switches, and Network TAPs.
DevOps at Cloud Expo – being held November 1-3, 2016, at the Santa Clara Convention Center in Santa Clara, CA – announces that its Call for Papers is open. Born out of proven success in agile development, cloud computing, and process automation, DevOps is a macro trend you cannot afford to miss. From showcase success stories from early adopters and web-scale businesses, DevOps is expanding to organizations of all sizes, including the world's largest enterprises – and delivering real results. Am...
What happens when the different parts of a vehicle become smarter than the vehicle itself? As we move toward the era of smart everything, hundreds of entities in a vehicle that communicate with each other, the vehicle and external systems create a need for identity orchestration so that all entities work as a conglomerate. Much like an orchestra without a conductor, without the ability to secure, control, and connect the link between a vehicle’s head unit, devices, and systems and to manage the ...
SYS-CON Events announced today that Interface Masters Technologies, a leader in Network Visibility and Uptime Solutions, will exhibit at the 19th International Cloud Expo, which will take place on November 1–3, 2016, at the Santa Clara Convention Center in Santa Clara, CA. Interface Masters Technologies is a leading vendor in the network monitoring and high speed networking markets. Based in the heart of Silicon Valley, Interface Masters' expertise lies in Gigabit, 10 Gigabit and 40 Gigabit Eth...
In this strange new world where more and more power is drawn from business technology, companies are effectively straddling two paths on the road to innovation and transformation into digital enterprises. The first path is the heritage trail – with “legacy” technology forming the background. Here, extant technologies are transformed by core IT teams to provide more API-driven approaches. Legacy systems can restrict companies that are transitioning into digital enterprises. To truly become a lea...
In his session at @ThingsExpo, Kausik Sridharabalan, founder and CTO of Pulzze Systems, Inc., will focus on key challenges in building an Internet of Things solution infrastructure. He will shed light on efficient ways of defining interactions within IoT solutions, leading to cost and time reduction. He will also introduce ways to handle data and how one can develop IoT solutions that are lean, flexible and configurable, thus making IoT infrastructure agile and scalable.