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posted in September 2002
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Sound Blaster Audio—The Trojan Horse for Motherboard Integration of DSPs
Design How-To  
9/27/2002   Post a comment
The evolution of HW/SW solutions from innovative, expensive add-on functions to indispensable, low cost motherboard implementations is the goal of most new PC technologies. Video/graphics controllers is a prime example of core ICs for PC architectures. As multimedia continues to drive PC demand, new silicon implementations, such as sound controllers and scalable signal processing accelerators will be added—each using DSP technology. From a business perspective, this is how that extension wi
Turning to Digital Crystals in GSM Transceivers
News & Analysis  
9/26/2002   Post a comment
VC-TCXO modules bring a size and cost penalty to next-generation GSM handset designs. Fortunately, DCXOs architectures are emerging that will addresses size and cost concerns in mobiles.
What Design Language is Right for You?
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9/26/2002   Post a comment
In the "design-language wars," change isn't necessarily good. Wally Rhines, Mentor Graphics' chairman and CEO, tells why the tried and true HDLs you now use, through evolution, might be the design and verification languages you're still using tomorrow.
Combining HFCs and Fixed Wireless for Broadband Deployment
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9/25/2002   Post a comment
To tap into new revenue streams, carriers must up the broadband ante for small- and medium-sized businesses. Linking fixed broadband wireless technology with existing HFC could help.
Hardware/Software Co-Design for SoC Development
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9/25/2002   Post a comment
Despite several vendors' promotions of their hardware/software co-design tools, existing tools do a poor job at allowing hardware and software expertise to be mixed. In this article, co-development tool vendor Tenison EDA discusses what the company feels is really needed for successful HW/SW co-design in an SoC environment.
Dealing with the EDGE Evolution
News & Analysis  
9/24/2002   Post a comment
EDGE is being touted as the next wireless plateau in the US sector. But to get there, designers must first deal with new modulation schemes, QoS support mechanisms, link adaptation, and more.
Shared, Switched, or Networked? The Uncharted Future of On-Chip Buses
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9/24/2002   Post a comment
Scrambling to keep up the the spiraling bandwidth requirements of high-speed processing cores, SoC designers are looking at various on-chip bus options. Jack Shandle describes three bus flavors—shared, switched, and networked—and discusses how some major microprocessor core and silicon IP companies are addressing the problem of moving data on silicon.
Silicon on Insulator
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9/23/2002   Post a comment
Material innovations transform mainstream processor design
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9/23/2002   Post a comment
Some in the industry express skepticism about the potential of SOI to improve integrated circuits' performance or reduce their power demands, or both.
SOI sharpens the leading edge as silicon scales to 90 nanometers
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9/23/2002   Post a comment
Over the last 40 years, the electronics industry, a major economic contender weighing in at the $1 trillion range, has relied on a single raw material-silicon-as the foundation for all electronics-based products.
Expanding MEMS with low-cost SOI wafers
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9/23/2002   Post a comment
The industrial use of silicon on insulator (SOI) substrates is quickly spreading.
Better models, production methods expand SOI applications
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9/23/2002   Post a comment
Silicon-on-insulator (SOI) will continue to find its place in high-performance applications and branch out into some of the networking and communications space.
Oxide isolation ramps next-gen process
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9/23/2002   Post a comment
Roughly every two years for the last decade and a half, a scaled CMOS technology generation has been introduced with about 70 percent smaller linear dimensions than its predecessor and transistors approximately 30 to 40 percent faster.
Buried oxide sharpens dopant profile
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9/23/2002   Post a comment
Silicon-on-insulator (SOI) sub-strates are considered among the most promising materials for the continued production of faster ICs with low power consumption.
ICs tailored for exotic substrates
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9/23/2002   Post a comment
As we move into the 21st century, substrate manufacturers will acquire more responsibility in IC development with more complex, partially processed substrates tailored to specific applications.
Future points to SOI with strained silicon
News & Analysis  
9/23/2002   Post a comment
This is an exciting time for anyone involved in silicon-on-insulator technology, as leading companies move from partially depleted SOI to strained silicon channels on SOI substrates.
Digital Regulation of Accelerator Power Supplies
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9/23/2002   Post a comment
Particle accelerators require magnet power supplies with very high performance. Digital technology advances have made it possible to implement very complicated regulation schemes using DSPs or PLDs. Hooman Hassanzadegan presents a new digital-regulation scheme based on state estimation that may replace traditional analog PID regulators. The article presents a state-space model of the proposed system, including power supply, regulator, and estimator, along with Matlab and Simulink simulations.
Fault Finder: Identifying Cable Problems with VCT
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9/19/2002   Post a comment
New silicon-based technology integrates cable tester functionality directly into the network system equipment, such as NIC cards and switches.
Current steering topologies guide D/A converter design
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9/18/2002   Post a comment
Digital to analog converters form the heart of many communications and mixed-signal circuits. From the August issue of Planet Analog magazine, an AMI engineer shows how current-steering trees can weigh bits accurately, while minimizing crosstalk and silicon area.
Know where your data goes before you make USB go fast
News & Analysis  
9/18/2002   Post a comment
USB has taken the computer peripheral world by storm. In a few short years, it has risen to be the dominant personal computer peripheral interface in almost every category, including printers, scanners, digital cameras, mice and keyboards. It is a "must have" interface for almost any peripheral. You want to add it to your design, so you pick the new 480 Mbits/s speed, right? Wrong, say Cypress engineers. Similar to any other engineering decision, there are tradeoffs involved. This article looks
Current limiting key to hot-swap circuit protection
News & Analysis  
9/18/2002   Post a comment
Many approaches are available for protecting a system against electrostatic discharge (ESD), surge current, overcurrent, undervoltage, overvoltage, and other problems. Each accomplishes a specific set of tasks. Some protection circuits are associated with a particular industry or company, and others are linked to a specific standard such as UL, USB, IEEE, CSA, or IEC. This piece - a preview from the September 23rd PA magazine -looks at live insertion issues.
The Multimedia Home Platform: Creating a Multimedia World in the STB
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9/18/2002   Post a comment
The MHP spec has been developed to accelerate the development and implementation of multimedia services in set-top box designs. Here's a look at the key technical elements that make up this multimedia spec.
LA-1: Standardizing the Look-Aside Processor Interface
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9/17/2002   Post a comment
Developed by the NPF, the LA-1 interface standardizes the movement of data between network processing elements and co-processors. Here's a brief look at some of LA-1's key technical elements.
What is the economic impact of GMPLS in metro optical networks?
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9/16/2002   Post a comment
The metropolitan optical network — given its need to support a diverse range of services using a variety of transport technologies — is an ideal candidate forgeneralized multiprotocol label switching (GMPLS)-based control and provisioning.
Sliced architectures extend Sonet/SDH for high- speed data
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9/16/2002   Post a comment
Initially deployed for voice traffic, Sonet/SDH has played a major role in today's service provider networks, combining voice, video, and data on a single robust transport mechanism.
Flexible bridging links optical and Ethernet networks
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9/16/2002   Post a comment
With network investments in a lull, infrastructure spot renovations are more common than teardowns and rebuilds.
Wavelength reach affects all optical performance
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9/16/2002   Post a comment
During the past three years, some of the most significant advances in optical networking have been made in the areas of system reach and photonic — or all-optical — switching.
Wavelength shifting hikes fiber capacity
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9/16/2002   Post a comment
New multiplexing technologies are emerging to fill the need for fiber in metropolitan networks.
Optical layer needs management
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9/16/2002   Post a comment
While it remains a challenging time for the telecommunications industry, advances are being made to reduce costs and improve service levels.
A Text-Dependent Approach to Speaker Identification
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9/16/2002   Post a comment
Speaker identification is a powerful, non-invasive, inexpensive biometric technique. Fueled by rapid advances in algorithms and computer technology, security systems based on speaker identification are ready to become pervasive as commercial products. A. Sankaranarayanan provides an introduction to the technology of automatic speaker identification.
Solving the Power Management Conundrum
News & Analysis  
9/12/2002   Post a comment
Designers looking to reduce consumption in 2.5G and 3G mobiles must improve power management in the analog and digital portions of a phone design. Here's some approaches on the horizon that might help.
Peering Into the CSIX Interface
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9/11/2002   Post a comment
The CSIX interface provides the promise of a common interface for the packet-processing portion of networking designs. Here's a look at the key CSIX elements and its impact on traffic manager/switch fabric designs.
Designing a DSP broadband modem for mesh radio networks
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9/10/2002   Post a comment
Recently our engineering team at Plextek was involved in the initial design and construction of a broadband wireless access system for Radiant Networks Plc (Essex, England).
Hitting the 10-Gbit Mark with SPI-4.2
News & Analysis  
9/10/2002   Post a comment
SPI-4.2 has become a pop star in the comm chip space. But to keep its stardom alive, designers must prove that this I/O can effectively handle 10-Gbit streams. And that's going to require proper configuration and usage.
Wireless communications platforms need ASIPs
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9/9/2002   Post a comment
The complexity of system-on-chips for embedded wireless devices is increasing while, at the same time, greater flexibility of the implementation is being demanded.
Voice packets resist interference
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9/9/2002   Post a comment
Interoperability of wireless devices is a growing concern, due to the rise in popularity of systems using unlicensed bands, spread spectrum and frequency hopping.
The essentials for designing a digital radio receiver
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9/9/2002   Post a comment
Digital receivers, sometimes called digital downconverters or digital drop receivers, are the fundamental building block of the software radio industry.
Standard socket interface tapped
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9/9/2002   Post a comment
Emerging 2.5G/3G wireless markets are introducing new data types and application performance requirements into the handheld-terminal market.
SoC teams 8-bit core with FPGA
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9/9/2002   Post a comment
Most broadband solutions use high-end 32-bit processors coupled with large external memories and specialized media-access controllers (MACs), ASICs or FPGAs.
FPGAs boost wideband receivers
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9/9/2002   Post a comment
Hardware multipliers have enabled FPGAs to invade such DSP territory as software radio, where they are now challenging both ASICs and programmable DSPs.
DSP/ASIC approach offers processing benefits for 802.11b implementation
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9/9/2002   Post a comment
With the advent of new high-bandwidth wireless data technologies such as 802.11b (Wi-Fi, WLAN), design efforts based on legacy chipset architectures have become a formidable problem.
DSP hardware extensions speed up 3G wireless multimedia
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9/9/2002   Post a comment
On top of the well-known signal-processing demands of broadband wireless devices, data-intensive 2.5G and 3G applications will require even more processing power.
T-Mobile's PocketPC Phone Edition: Are We There Yet?
Teardown  
9/5/2002   Post a comment
The Phone Edition smart-phone hybrid from Voicestream/T-Mobile is a promising but still somewhat flawed step toward pocket-friendly "any kind, anytime, anywhere" communications. The design also telegraphs a potential for new players to upset the power balance as smart-phone components become merchant market items.
Heading out onto the fiber
News & Analysis  
9/4/2002   Post a comment
Optical communications quenches the industry's thirst for ever greater bandwidths, but placing information onto fiber is not without its challenges. This paper, originally published in a sister publication (Microwave Engineering) looks at some of the modeling issues associated with components and signal conditioning stages required for Electro-Optic Transmission.
Understanding gain-and-load dependencies the key to successful rail-to-rail op amp use
News & Analysis  
9/4/2002   Post a comment
Single-supply op amps with rail-to-rail operation are designed to support new-generation battery-powered portables. But their behavior can be quite different from that of conventional operational amplifiers with dual 15V rails. Read the data sheet performance curves carefully: They depict gain and load limitations, explains this Texas Instruments/Burr-Brown products veteran.
Simplifying Adaptive Filter Design in Echo Cancellers
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9/4/2002   Post a comment
Echo cancellation has traditionally been relegated to a few engineers with a special skill set. But through the use of online and offline filtering, echo cancellation is now a much easier task to handle when developing VoP system designs.
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