September 2, 2002 Magazine Archive

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ISSUE DATE: SEPTEMBER 2, 2002

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AC-DC switcher IC, Thermal analysis tools, DDR FCRAM controllers, Embedded in ED

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September 2, 2002 - In This Issue

More About The Rambus Yellowstone Signaling Technology
In the Yellowstone signaling scheme, only the host controller needs to pack the FlexPhase adjustment circuits. The cost of the memories or other Yellowstone components is competitive, then, because they donÕt have to add the timing-control circuits.... — Dave Bursky

Letters: Readers Respond To Spam
Dave Bursky's August 5 editorial, "E-mail Spam: Enough Is Enough! The Time For Action Is Now!" generated a lot reader response! Here are some of your letters. Charge It! To stop spam, the government can charge for... — Various

[Technology Report]
Soaring Power Consumption Drives Thermal Analysis Tools
Recently, one industry analyst noted that server farms in Seattle are dissipating as much power as the rest of the Seattle metro area, including the Boeing plants in Everett. Also, 25% of the total cost of their operation is for power and air... — Tets Maniwa

[Product Innovation]
AC-DC Switcher IC Yanks The Plug On Linears
Over the past few decades, switching power supplies have become an increasingly popular alternative to linear power supplies. Also commonly called switchers, they offer higher efficiency, smaller size, and lighter weight than linears. These advantages... — David G. Morrison

[Design Application]
DDR FCRAM Boosts Performance In DDR SDRAM Designs
A modified form of synchronous DRAM technology, double-data-rate, fast-cycle random access memory (DDR FCRAM) is primarily focused at the networking market segment. Yet due to its high performance, it also suits such applications as graphics, gaming,... — Wasim Alim , et al.

[Ideas For Design]
Use Multiplier Core For FM Stereo Multiplexed Transmission System
A versatile four-quadrant analog multiplier core from Analog Devices, the AD633, is widely used in applications like modulation and demodulation, automatic gain control, power measurement, and voltage-controlled amplifiers. This wide spectrum of... — Saurav Gupta , et al.

[Ideas For Design]
Low-Side Current-Sensing Circuit Uses Synchronous V-To-F Converter
A voltage-to-frequency converter (VFC) can easily measure current flow and convert it to a digital signal understood by the timer/counter input of a microcomputer (µC) or microprocessor. It's a straightforward task to add a single opto-isolator... — John Wynne

[Ideas For Design]
Shunt Capacitance Can Suppress Magnetic Headset Oscillation
The nominal impedance of a magnetic headset isn't necessarily a good description of its actual impedance as a function of frequency. A headset's fairly complex equivalent circuit may even lead to parasitic oscillations in a driving amplifier. But... — John Dunn

[Editorial]
Corporate America Should Do More To Advance Medical Technology
Anyone who has ever spent time in a hospital or come close to entering one is probably praying for the day when the medical sensors and healing devices seen in shows like Star Trek become reality. Although such devices remain many years off,... — Dave Bursky

[Pease Porridge]
What's All This Dilution Stuff, Anyhow?
One of my friends sent me a wee bottle of scotch whisky to take on my trek in Nepal. He planned to bring the rest of the whisky to a 45th school reunion on June 9. He would drink a toast with our fellow alumni in Mount Hermon, Mass., at 11 p.m. on... — Bob Pease

[Viewpoint]
The Humble Potentiometer Speaks Your Microprocessor's Language
The digital revolution led to the reduced usage of potentiometers as trimmers. Yet it also has acted as a catalyst for the increased demand of potentiometers as a means for the user or the machine to communicate with the... — David H. Meehan

[Editor's Notebook]
And The Winner Of This Year's Science And Engineering Fair Is...
I have a vested interest in science fairs. My kids have been involved with them for many years. Along with some excellent science teachers and mentors, and two parents who are engineers, the fairs have helped keep my children's interest in science and... — William Wong

[Embedded in Electronic Design]
Patently Standard?
Many products live and die by standards. They can also exist and terminate based on patent royalties. The combination can place embedded developers be-tween a rock and a hard place when it comes to designing systems that must employ the latest... — William Wong

[Embedded in Electronic Design]
Key Embedded Java Standards
Though Sun Microsystems (www.sun.com) started the JCP and remains the dominant factor in the creation and approval of Java Specification Requests (JSR), a host of companies, organizations, and individuals also play a role. JSRs tend to gain... — William Wong

[Embedded in Electronic Design]
Hardware Directory: Architecture Targets Multiprocessor System-On-A-Chip Applications
Two processors can work better than one when they're tuned to a particular application area. Tensilica's new Xtensa-V architecture makes this possible for any number of processors in addition to providing improvements in a single-processor... — William Wong

[Embedded in Electronic Design]
Hardware Directory: GPP/DSP Chip Offers Higher Performance Using Less Power
Texas Instruments (TI) has been very successful with its OMAP dual-processor chip in the cellular telephone market. Its latest OMAP incarnation, the OMAP5910, targets other multimedia devices, such as PDAs, set-top boxes, and other embedded... — William Wong

[Embedded in Electronic Design]
Software Directory / ECMA-335: The Other Virtual Machine
The Java virtual machine (JVM) is not alone in the world. Microsoft decided that it could do the JVM one better with its .Net environment. While larger, .Net is far from an open system. Its core virtual machine (VM) and primary programming language,... — William Wong

[Embedded in Electronic Design]
News Clips
SoC Plays MP3 With RISC/DSPThe Cirrus Logic CS7410 targets portable MP3 players. It packs a 32-bit RISC core, a 16-bit audio DSP, an 18-bit delta-sigma digital-to-analog converter (DAC), 256k of ROM, and 80k of RAM... — William Wong

[Celebrating 50 Years]
Flashback
FLASHBACK >10 YEARS AGO SEPTEMBER 3, 1992 The field of analog-to-digital converters (ADCs) has seen numerous advances over the past couple of years, particularly in 12-bit devices. For example, you... — Staff

[Forefront]
Programmable Analog Arrays Enable Dynamic Changes Within Modules
The AN220E04, also known as the Anadigmvortex, is the first of a family of second-generation field-programmable analog arrays (FPAAs). It's based on fully differential switched-capacitor technology coupled to a digitally controlled analog switch... — Tets Maniwa

[Forefront]
Low-Voltage Differential Signaling Scheme Delivers Roadmap To 6.4-GHz Data Rates
A novel signaling interface that delivers up to 8 bits per clock cycle promises to open the door to low-power, high-speed chip-to-chip or board-to-module data transfers. Created by Rambus Inc. of Mountain View, Calif., the Yellowstone signaling scheme... — Dave Bursky

[Forefront]
SoC Test Platform Speeds Time-To-Volume
The Octet configurable system-on-a-chip (SoC) platform from Credence Systems combines a comprehensive software package and built-in flexibility to speed time-to-volume. Built on a standard 1024-pin architecture, Octet includes options for... — Lisa Fakhry

[Forefront]
Linux Development Platform Eases FPGA Design
For the first time, developers of FPGA systems using the popular Xilinx products can build and deploy their systems on a Linux platform, thanks to the Linux Professional Edition from MontaVista Software. The platform will support Xilinx's Virtex-II... — Roger Allan

[Forefront]
High Security, Low Power
Pulling only 6 mA, M-Systems' Superscalar Modular Arithmetic Processor (SuperMAP) coprocessor handles the RSA 1024 algorithm with ease—and that's just one of the cryptographic algorithms SuperMAP supports, making this core IP ideal for embedded... — William Wong

[Forefront]
Of Note...
Version 2.1 of Altera's Quartus II FPGA development software, which is aimed at the Stratix device family, supports integration of multiple high-speed clock domains and complex IP cores in system-on-programmable-chip designs. A pushbutton means... — Staff

[New Products]

• High-Density Cable Interface Connectors Pack 136 Circuits In A Two-Row Design — Lisa Fakhry

• RF Socket Shortens Signal Path To 0.008 in. — Lisa Fakhry

• Connectors Distribute Power To Bus Bars And Backplane Assemblies — Lisa Fakhry

• Through-Hole DC Power Jack Integrates Custom LED — Lisa Fakhry

• Gigabit RJ-45 Connectors Take On 1000BaseTX Duties — Lisa Fakhry

• Circular Plastic Connectors Use Overmolding To Relieve Wire Strain — Lisa Fakhry

• Micro-Pitch Connectors Maximize Interconnect Density — Lisa Fakhry

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