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Internet of Things Designline
posted in June 2002
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Advancing the Set-Top Box
Design How-To  
6/27/2002   Post a comment
Designers need to manage multiple specifications and integrate PVR, WLAN, cable modem, telephony and a host of other technologies in order to develop set-top boxes and residential gateways for worldwide markets
Circuit techniques minimize temperature dependence for DPPs
News & Analysis  
6/26/2002   Post a comment
The digitally programmable potentiometer (DPP) has two temperature dependent parameters, writes this now-famous applications guru. The temperature dependence of an analog circuit using a DPP is reduced if the main temperature coefficient can be shifted from the end-to-end resistance of the pot to a more ratiometric value. Catalyst Semiconductor's Chuck Wojslaw gives details.
Motion control technology jumps into the driver's seat
News & Analysis  
6/26/2002   Post a comment
Today's motion control technology - specifically variable speed motor control - offers a navigation path to the high performing, fuel-efficient vehicles of the future. Running a car from multiple motors (instead of a single fan belt) enables peppy acceleration, precision steering and ride control - all with greater fuel economy. Power management electronics plays a key role, says visionary Alex Lidow.
Optimizing the Partition of Net Processing, Traffic Management Functions
Design How-To  
6/25/2002   Post a comment
Off-the-shelf network processors and traffic managers have arrived for 10-Gbps/OC-192c networking designs. But to be effective, designers must optimally partition packet processing and traffic management functions.
Database Modeling in UML
News & Analysis  
6/25/2002   Post a comment
When it comes to providing reliable, flexible, and efficient object persistence for software systems, today's designers and architects are faced with many choices. From the technological perspective, the choice is usually between pure Object-Oriented, Object-Relational hybrids, pure Relational, and custom solutions based on open or proprietary file formats. In this feature article, Geoffrey Sparks addresses one of those choices, the layering of an object-oriented class model on top of a purely r
Robots called electronics driver of 21st century
News & Analysis  
6/24/2002   Post a comment
As the competitive field narrows for World Cup soccer, Honda Motor's Asimo robot kicked a soccer ball to start the RoboCup competition last Thursday (June 20) as part of the Robotrex 2002 exhibition, where developers and builders forecast a broad, expanding market for robots.
Wireless mesh shares MP3 files
News & Analysis  
6/24/2002   Post a comment
You pull up to a light, and the car next to you is playing a song you wish you could hear from the beginning.
Rights concerns limit distribution
News & Analysis  
6/24/2002   Post a comment
Imagine yourself in the following scenario: You drive out to the mall on a Saturday afternoon to buy a pair of the latest Air Jordans.
Reservation approach guaranties quality sound delivery
News & Analysis  
6/24/2002   Post a comment
Audio, however it is transmitted, challenges a system's real-time capabilities.
Memory systems define consumer options for portable audio players
News & Analysis  
6/24/2002   Post a comment
Although experimentation will continue with portable Internet audio players, three device classes will dominate the market for the next few years: portables based on flash memory, optical spinning media, and hard disk drives.
Internet Audio
News & Analysis  
6/24/2002   Post a comment
IP transport the ideal vehicle for Internet audio
News & Analysis  
6/24/2002   Post a comment
Selecting transport mechanisms for a digital media device is one of the most important choices designers have to make.
Endpoint techniques bolster audio quality for VoIP
News & Analysis  
6/24/2002   Post a comment
Once a novelty, Voice-over-Internet-Protocol (VoIP) has become a serious alternative for enterprise phone systems.
Distribution/protection dilemma
News & Analysis  
6/24/2002   Post a comment
What if there was a free publishing Web site, called, say, Bookster?
Codec designs fine-tuned with spectral band replication
News & Analysis  
6/24/2002   Post a comment
Over the past two years, two new audio codecs have made their inroads into the market.
Better test strategies needed for quality digital audio
Design How-To  
6/24/2002   Post a comment
When they work well, Internet audio devices seem to be the essence of simplicity; press "play" and hear your music.
Studios pause as audiophiles embrace digital
News & Analysis  
6/21/2002   Post a comment
The next big format for music may be just plain bits. Many audiophiles who have amassed collections of vinyl records, cassette tapes and compact disks see digital as the ultimate format-though it's not clear where users will house liner notes and album cover art.
Going Serial in Gigabit Ethernet Designs
Design How-To  
6/20/2002   Post a comment
As the Ethernet sector moves to 1- and 10-Gbps speeds, designers must swap out parallel interface formats for serial schemes. SGMII and XAUI provide nice migration paths.
Merging WLAN, WWAN Radios in Mobile Designs
Design How-To  
6/19/2002   Post a comment
To deliver WLAN and cellular functionality in the same system, designers must closely manage performance, power, size, weight, and cost requirements. To deliver WLAN and cellular functionality in the same system, designers must closely manage performance, power, size, weight, and cost requirements.
Linux System Development on an Embedded Device
News & Analysis  
6/19/2002   Post a comment
Embedded Linux development for embedded devices such as broadly involves three tiers: the bootloader, the Linux kernel, and the GUI. In this article, IBM's Anand K. Santhanam and Vishal Kulkarni focus on some basic concepts involving these three tiers; provide some insights into how the bootloader, kernel, and filesystem interact; and investigate some of the numerous options available for the filesystem, GUI, and bootloaders.
Après DAC—But Wait, There's More
Design How-To  
6/18/2002   Post a comment
The Design Automation Conference is over, but some additional product announcements promise exciting design advancements down the road. TechOnLine's Jim Lipman discusses some of the ones that were of particular interest to him.
RF net scales broadband to local area
News & Analysis  
6/17/2002   Post a comment
Local multipoint distribution service (LMDS) is primarily aimed at providing fast network access for buildings within a radius of several kilometers using wireless technology.
Portable wireless appliances: access point for home nets
News & Analysis  
6/17/2002   Post a comment
Powerline and wireless physical-layer technologies allow reliable data transfer between multimedia appliances at faster data rates than ever before.
Gateway lets consumer control home appliances over mobile wireless nets
News & Analysis  
6/17/2002   2 comments
A new interconnect approach for wired and wireless networks lets consumers remotely control a range of products in the home network — TV, VCR, security camera, CD-ROM, thermostat — from a mobile phone or a web pad.
DOCSIS 2.0: Upping Upstream Performance in Cable Modem Designs
Design How-To  
6/17/2002   Post a comment
New Specification provides a boost in return channel operation while combating tough noise problems.
Provisioning for AAL2 Services in NPUs
Design How-To  
6/13/2002   Post a comment
Net processor architectures have evolved to a point where they can handle key ATM functions, such as flow control and QoS, required by 3G infrastructure designers.
Test techniques provide insights for noise-sensitive applications
News & Analysis  
6/12/2002   Post a comment
If there is an analog-to-digital (A/D) converter in the signal path of your signal-condition system, there are three fundamental tools that can be used when assessing the circuit's performance. These include frequency analysis (FFTs), time analysis, and DC analysis techniques. In this tutorial, Microchip Technology's famous apps engineer, Bonnie Baker, offers some waveforms - and advisories for interpreting them.
Engineers note: Capacitors are key to voltage regulator design
News & Analysis  
6/12/2002   1 comment
Why do LDOs hate ceramic bypass capacitors? Why do LDOs oscillate? Some 99 percent of the "design" problems associated with linear and switching regulators can be traced to the capacitors: the wrong type, the wrong value, or bad physical placement. National Semiconductor's power supply technologist, Chester Simpson offers some long overdue advisories.
Mitigating Interference in Multi-Radio ICs
Design How-To  
6/12/2002   Post a comment
Designers are being asked to merge GPS, GSM, and Bluetooth in the same piece of silicon. To get there, designers must deal with phase noise, intermodulation, blocking, and more.
Secure Flow Processing Enhances QoS in Routers
News & Analysis  
6/11/2002   Post a comment
By merging QoS capabilities with stateful processing engines, designers can improve the transmission of VoIP, video conferencing, and other real-time data streams.
Virtual concatenation, LCAS benefit next-gen Sonet/SDH nets
Design How-To  
6/10/2002   Post a comment
To support the massive Internet expansion of recent years, carriers significantly increased the capacity of backbone and core networks.
Network vendors brew Ethernet/SONET hybrid
News & Analysis  
6/10/2002   Post a comment
System vendors are welcoming new technologies for carrying Ethernet over synchronous optical networks (SONET), a development that will enable additional services on their previously SONET-only platforms.
Manufacturing approach simplifies high-interconnect optical subsystems production
News & Analysis  
6/10/2002   Post a comment
The fiber optic switching component business is accustomed to expensive manufacturing facilities requiring the large workforce needed to align countless fiber optic strands.
MEMS-based light valves manage wavelengths for DWDM optical networks
News & Analysis  
6/10/2002   Post a comment
The recent business downturn has put significant pressure on makers of optical gear to reduce costs while simultaneously improving performance.
Cost and reliability concerns dominate DWDM multiplexer design
Design How-To  
6/10/2002   Post a comment
Dense Wavelength Division Multiplexing (DWDM) is used to increase the bandwidth capacity of fiber-based systems in the telecommunication and CATV industries.
Building up to transparent and reconfigurable optical networks
News & Analysis  
6/10/2002   Post a comment
Transparent and reconfigurable, or agile, optical networking promises both economy and flexibility, but its promise has yet to be fulfilled.
Successfully Using Linux and Open Software in an Embedded System Design
News & Analysis  
6/10/2002   Post a comment
Fueled by time-to-market pressures and the need to reduce overall system cost, many developers are migrating to Linux and open-systems software in their embedded systems designs. There are some real challenges that face an embedded designer who wishes to use Linux in his product. LynuxWorks' Greg Rose presents questions developers should ask while planning embedded designs, how Linux stacks up, and how to overcome some of those challenges.
Debugging Embedded Bluetooth Designs
Design How-To  
6/7/2002   Post a comment
The Bluetooth market is primed for growth, pushing designers to quickly get systems to market. By using visualized message sequence charts, designers can accelerate development cycles.
Complete SoC Design, Verification Reign at DAC Exhibits
Design How-To  
6/7/2002   Post a comment
So you're going to the Design Automation Conference and don't know where to start on the exhibit floor? Save your shoe leather—TechOnLine's Jim Lipman takes you on a DAC virtual tour of some the most interesting products in several key technology areas.
MEMs eye dynamic optical products
News & Analysis  
6/6/2002   Post a comment
The current slowdown in telecommunications spending clearly indicates that increased bandwidth capacity will not automatically translate into increased demand for the optical components and subsystems needed to enhance the network infrastructure.
Static crosstalk analysis assures silicon success
Design How-To  
6/5/2002   Post a comment
With the rapid move to ultradeep submicron designs and feature size processes of 0.13 micron and below, ensuring the integrity of signals as they traverse conductors on a chip is becoming a challenge.
Signal integrity permeates design process
Design How-To  
6/5/2002   Post a comment
Designers agree that they must address signal integrity when using a 0.13-micron process or below. But less clear is just how and where in the design flow signal integrity should be dealt with.
Signal integrity drives post-layout verification
Design How-To  
6/5/2002   Post a comment
Accelerant Networks is a developer of high-integration ICs that allow rapid development of intelligent, high-speed backplane connection systems.
IC layout must avoid crosstalk problems
Design How-To  
6/5/2002   Post a comment
With process technologies evolving from 0.18 micron to 0.13 micron and on to 90 nanometers, signal integrity effects are strongly influencing the performance of integrated circuits.
How crosstalk causes problems
Design How-To  
6/5/2002   Post a comment
Signal integrity effects are becoming ever more visible for geometries of 0.13 micron and below.
Early power estimates guide IP selection
Design How-To  
6/5/2002   Post a comment
Aura Communications is a fabless semiconductor company that has developed an enabling technology for low-cost, low-power, wireless personal-area networks.
Deep submicron design is more than just 'noise'
News & Analysis  
6/5/2002   Post a comment
Designers have brought designs as low as 0.18 micron to tapeout without signal integrity closure, although at the expense of performance.
Crosstalk, power haunt UDSM designs
News & Analysis  
6/5/2002   Post a comment
A clear understanding of design-integrity issues and the ability to control related problems are prerequisites for first-time success in silicon.
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