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1010 results found, displaying items 341 - 360
Bob's Mailbox
Dear Bob: It was with initial interest (eyes resting on the large-font title), then mounting dismay that I engaged in the misfortune of reading your article "What's All This Input Impedance Stuff, Anyhow?"* Being familiar with the...
I2C-Programmable DC-DC Converter Chip Gives Handhelds A Hand
When I ask companies about design-ins, most bring up the worldwide lack of qualified power-supply designers. The need grows more acute as the number of rails in new products, particularly in battery-powered consumer products, increases. One...
Expect A Rush Of New Designs With Arrival Of VoIP Codec
According to Juniper Research, Voice over Internet Protocol (VoIP) will account for over 12% of all telephony revenues by 2009 as it evolves from a replacement service for the public switch telephone network to a new converged service for home and...
New Industrial Analog Process Technologies
Sponsored by: ANALOG DEVICES
In the early days of analog ICs, chip designers had a large arsenal of circuit elements that let them create products with exceptionally high performance. Over time, to keep analog IC prices competitive, analog process technologies followed the...
What's All This Merit Badge Stuff, Anyhow?
Yes, I used to be a Boy Scout, and I think I earned about six Merit Badges. Did they have an Electricity or Electronics Merit Badge back in 1954? Probably, but I did not earn that one. I did pass swimming, though. So how can we get kids interested...
Multigigabit Analog Equalizer Cleans Up After Backplane Messes
Aerial transmission over FR-4 backplanes of up to 6.25 Gbits/s, with trace lengths up to 30 in., is now possible for multigigabit switch, router, storage-area-network, and server backplanes. Slicing through the Gordian knot of jitter is the...
Automotive ISM-Band Transmitter Meets Worldwide Standards
The AS3977, a novel multichannel narrow-band RF transmitter from Austria Microsystems, supports frequency-division multiple-access and time-division multiple-access modes for redundant data transmission over distances up to one mile for...
Go Hybrid On AMS Verification
Sponsored by: CADENCE DESIGN SYSTEMS
Meet in the Middle Although top-down analog/mixed-signal (AMS) design methodologies have been promoted by academia for many years, few people use them, especially in the U.S. Analog-flavored HDLs like Verilog-AMS and...
Bob's Mailbox
Dear Bob: I was just looking through Electronic Design and noticed something in "Bob's Mailbox"* about the 555. Interestingly enough, I did an improved version of the then NEC555, or ICM555. The TI TLC555 all-CMOS timer was designed...
Investigators “See” Crimes On Audiotape With Magnetic Imaging
Even in the 21st century, old-fashioned audiotape can be critical evidence in criminal investigations. But determining a tape's authenticity has required painstaking manual work and a sharp pair of ears—until now. The National Institute of...
Woofers Run With The Big Dogs With Motor-Driven Mini Voice Coils
Driving a multitude of small diaphragms with motors instead of speaker coils promises big bass-audio response in small volumes. Supported by three papers, Tymphany Corp. demonstrated this concept at the Audio Engineering Society (AES) conference...
FPAAs Offer Twice The Analog Bang For Nearly The Same Buck
Two new Anadigm field-programmable analog arrays (FPAAs) for programmable analog implementations in high-volume audio, indus- trial, and medical systems offer twice the processing capability of the company's entry-level devices. However, the...
Four-Band Power Amp Eyes GSM/GPRS Cell Phones
The MMM6035 50-Ω power amplifier is destined for dual-, tri-, and quad-band GSM/GPRS cell phones (see the figure). This tiny two-chip module comprises a dual-amplifier die and a CMOS power-control die. Such a combination simplifies...
Space-Ready MOSFETs Shrug Off Cosmic Rays
Year to year, power MOSFETs don't change very much—a little faster, a little better on-resistance, nothing really radical. That sameness can also be said for susceptibility to cosmic rays. So it's surprising when International Rectifier...
Dates For Analog/Mixed-Signal Wafer Runs Scheduling Now
Fabless companies looking to prototype new analog and mixed-signal designs may want to contact PolarFab, which is scheduling 2005 runs on its PolarShuttle multiproject, fast-track wafer program. PolarShuttle combines designs from multiple...
Solve The Issues Associated With Analog-To-Digital IP Integration
The huge increase in variety and number of ways people interact with electronic communications systems is no secret. More cell phones, wireless computers, and other multifunction, media-rich products such as PDAs, MP3 players, and digital cameras...
Data Converters For Cell-Phone Basestation Design
Sponsored by: ANALOG DEVICES
Cell-phone basestations are regularly updated to expand system capacity as well as implement new standards and data services. Complete replacement of equipment is too expensive, so most carriers look to vendors for system upgrades. Soon, many...
LVDS For Bus Signaling
Sponsored by: NATIONAL SEMICONDUCTOR
Because of its low-power and low-noise characteristics, the low-voltage differential-signaling (LVDS) standard technology is an important candidate for the physical layer in high-speed data-serializing schemes. It provides more than twice the noise...
Simulation Vs. Silicon: Avoid Costly Mistakes With Accurate Models
When first-pass silicon arrives back from the foundry, accurate simulation models are critical to first-time success. Of course, we all prefer to avoid expensive learning experiences. So every designer's ultimate goal is to hear the response...
Bob's Mailbox
In my last column, I promised to tell you how we fixed the "selective-fit" problem with the K2-XA op amp.* Let's take care of that before we get to this month's letters. The "final solution" for the K2-XA was to add a transistor to the circuit...
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