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Content tagged with Internet of Things Designline posted in June 2002
Circuit techniques minimize temperature dependence for DPPs
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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
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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.
Database Modeling in UML
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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
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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
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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
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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
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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
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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
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6/24/2002   Post a comment
IP transport the ideal vehicle for Internet audio
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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
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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
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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
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6/24/2002   Post a comment
Over the past two years, two new audio codecs have made their inroads into the market.
Studios pause as audiophiles embrace digital
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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.
Linux System Development on an Embedded Device
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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.
RF net scales broadband to local area
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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
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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
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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.
Test techniques provide insights for noise-sensitive applications
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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.
Secure Flow Processing Enhances QoS in Routers
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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.
Network vendors brew Ethernet/SONET hybrid
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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
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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
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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.
Building up to transparent and reconfigurable optical networks
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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
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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.
MEMs eye dynamic optical products
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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.
Deep submicron design is more than just 'noise'
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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
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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.
ALF facilitates SI-aware design flow
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6/5/2002   Post a comment
Many of the challenges facing EDA tool users graduating to ASIC-style system-on-chip (SoC) design at 0.13 micron and below can be addressed through the use of new methodologies taking advantage of the Advanced Library Format (ALF).
Physical Design Flow Taps Partition Layout
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6/4/2002   Post a comment
Detailed and precise hierarchical design planning is essential to achieving closure on large designs. In this article we describe a new hierarchical design flow and its...
Language Attributes Ensure IC Verification
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6/4/2002   Post a comment
Hardware verification languages (HVLs) have survived past the critical early-adopter stage and are now aggressively entering the mainstream.
FPGA Designs Take on Timing Closures
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6/4/2002   Post a comment
Over the last couple of years, FPGAs have made amazing advances in performance and capacity. Solutions, such as physical synthesis, are now needed that allow designers to take advantage of these improvements.
Rosetta Blooms for System-level Design
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6/4/2002   Post a comment
The EDA industry has made significant progress in developing system-level design tools and languages for functional verification.
Comms SOC Design Challenges Tool Capability
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6/4/2002   Post a comment
Continuing advances in process technology give us the ability, in principle, to design ever-more-complex communications systems-on-chip at higher speeds.
MEMS Overview
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6/4/2002   Post a comment
In the "smaller is better" world of microelectromechanical systems (MEMS), device processing is king. This overview from Sandia National Laboratories describes the intricate manufacturing processing you need to add to a CMOS device to build viable MEMS-based SoCs.
Clocking Strategies for QDRII, DDRII Designs
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6/4/2002   Post a comment
To meet the high-speed requirements of designers, second-generation QDR and DDR memories are on the way. In addition to delivering wider bus widths, these memory schemes provide a host of clocking options.
System C: a realistic SoC debug strategy
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6/3/2002   Post a comment
As Moore's Law steams ahead, the resulting rush to retool for ever-smaller geometries has led to the realization by most leading companies designing systems-on-chip that the emphasis in SoCs is on that "S," for system.
Reconfigurable IP requires a flexible software development toolset
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6/3/2002   Post a comment
Until recently SoC technology was considered the exclusive domain of high-tech multinational companies. That's because of the high entrance barriers: the need for diverse and complex expertise, the high costs of hardware and software development tools and the shipment volumes required to justify the cost of ASIC development.
Embedded real-time behavior requires "design-in" processes
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6/3/2002   Post a comment
In embedded environments, where the reliability of one element of a design often dictates the reliability of the whole, issues such a real-time correctness is best achieved through "design-in" techniques rather than the traditional "test-in" timing performance procedures at the end of development.
Dealing with determinism in DSPs with pipelines and caches
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6/3/2002   Post a comment
To increase the performance of time-critical code, new DSPs are adopting RISC architectural features such as caches and pipelines.
Comprehensive tool chains needed to debug multiple processor cores
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6/3/2002   Post a comment
The increasing reliance on complex multicore designs is driving the need for comprehensive debugging tools that can answer a variety of challenges.
Adapting traditional embedded debug strategies to SoC designs
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6/3/2002   Post a comment
Embedded systems are becoming more complex. The trend in silicon design has been to put the whole system on a single chip.
Smart Basestations Maximize Capacity
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6/1/2002   Post a comment
Advanced processors are allowing the adoption of smart antennas and multiuser detection to triple basestation capacity-for a start.
Simulation Tools Converge On Large RFICs
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6/1/2002   Post a comment
The complexities of RFICs demand the use of highly integrated tools that can readily assimilate the latest simulation software and concepts.
Reduce Power-Supply Effects on ADSL Data Rates
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6/1/2002   Post a comment
Careful selection of the supply's switching frequency can improve the data rate, size, power consumption and cost of ADSL modems.
Advanced MEMS Usher in All-Optical Networks
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6/1/2002   Post a comment
However, using MEMS puts the onus on designers to examine how those devices will be optimally controlled, tested and packaged.


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8 comments
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No 2014 Punkin Chunkin, What Will You Do?
Martin Rowe
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Making the Grade in Industrial Design
Rich Quinnell
13 comments
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Book Review: Controlling Radiated Emissions by Design
Martin Rowe
1 Comment
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