Digital supply controller breaks away Product News 4/19/2005 Post a comment Product Review - Touted as the first fully digital switchmode power controller to deliver both flexibility and performance, the highly-integrated Si8250 digital power supply controller from Silicon Laboratories (Austin, Texas) partitions the chip architecture into a control section and a system management section, each with its own dedicated, programmable processor.
Verstärker-IC für Militär- und Nachrichtentechnik News & Analysis 4/18/2005 Post a comment Der auf Mikrowellenschaltungen spezialisierte Chiphersteller TX—Mimix Broadband hat einen zweistufigen Eintakt-MMIC-Hochleistungsverstärker auf Gallium-Arsendid-Basis (GaAs) für das X-Band vorgestellt. Der Eintakt-Chip kommt mit einer integrierten Gate-Bias-Schaltung und soll eine einfachere Vorpolung ermöglichen.
RS485 transceivers are tweaked for higher data rates and fail safe transmission Product News 4/15/2005 Post a comment Never as fast as LVDS, never as consumer savvy as 1394, never as addressable as CAN bus nodes, RS485 transceivers nonetheless support a wide variety of data communication and control applications. They are used extensively in instruments and in factory-floor applications because of their simple wiring and noise immunity. A number of suppliers are turning these bread-and-butter components into glamour items with 40 Mbits/s transmission speeds, low-voltage operation and fail safe data integrity. S
Power filter cleans up low-voltage supplies Product News 4/14/2005 Post a comment Picor's QPO-2 System-in-a-Package is an active power filter that reduces a supply's output ripple and noise (also called periodic and random deviation, PARD) by more than 30 dB from 1 kHz to 500 kHz. Inserted between the output of a 0.3- to 5.5-volt supply and the load, the QPO-2, which handles up to 20 amps, improves transient response and ensures quiet point-of-load regulation when used with most switching power supplies. It's particularly suited to applications in test and measurement, distri
Fairchild Semi posts loss, expects flat Q2 News & Analysis 4/14/2005 Post a comment Fairchild Semiconductor reported a net loss of $10.4 million, or 9 cents per share on sales of $362.8 million in the first quarter of 2005, as the semiconductor supplier saw seasonally slow overall sales, falling prices, and declining gross margins negate strong demand in the power market.
Fastest OR-ing controller is also most efficient Product News 4/13/2005 Post a comment International Rectifier, with its IR5001S controller-driver for "active OR-ing" of multiple power supplies and reverse polarity protection applications, claims big gains in efficiency over traditional diode solutions as well as a significant improvement in response time to system faults over competing controller/MOSFET-based OR-ing methods.
New microcontroller features signal-chain-on-chip functions Product News 4/13/2005 Post a comment Texas Instruments Inc. has launched what it claims is the industry's first signal-chain-on-chip microcontroller family for high precision sensing and measurement applications. The MSP430F42x0 MCU features an ultra-low power core and integrated peripherals, including a 16-bit sigma delta analog-to-digital (ADC) converter, up to 32-Kilobytes of flash memory and a liquid crystal display (LCD) driver with an internal charge pump.
What's this about all the noise? Power DesignLine Blog 4/13/2005 Post a comment Noise has always been a component of switched mode power supplies and as with most designs there are trade-offs you have to consider for you SMPS design. Paul Greenland, Marketing Director of National Semiconductor gives you a shopping list of items to look out for when designing with switchers, so you can minimize your trade off gotchas.
TFT-LCD driver brings power to the big screen Product News 4/13/2005 Post a comment Texas Instruments' touts its TPS65160 as a complete, high-accuracy power supply chip that provides all four operating voltages for the thin-film-transistor liquid-crystal display (TFT-LCD) panels serving in today's large-screen monitors and TVs.
Storage disk arrays pose challenges for chassis design Blog 4/11/2005 Post a comment We had heard from Teradyne's Chris Heard at DesignCon about some of the issues involved in the packaging of RAID storage cabinets. A visit from Maxtor confirmed some of the things we had been hearing: Though drives were getting smaller, they were getting packed tighter together on a rack. Heat and cable routing is becoming a problem. Here is Chris' commentary from Planet Analog magazine.
Isolated digital signal coupler transfers fast or slow pulses News & Analysis 4/11/2005 Post a comment Optocouplers are the usual choice for coupling digital signals between isolated circuits that have different ground levels. Optocouplers have disadvantages, however. Their most important parameters (current transfer and propagation time) change with age. They have relatively high static power consumption, and for most types the speed is limited. Maxim's applications engineers present an alternative scheme that relies on magnetically-coupled FET drivers.
White LED backlights: Choosing a serial or parallel connection Design How-To 4/11/2005 Post a comment Early white LED drivers had to use a constant current configuration to account for inconsistent quality in the manufacture of the light sources. While quality has improved, allowing constant voltage regulation, a boost regulator can be tricky to implement. The design key, suggests an Analogic Tech engineer, to make proper choices between serial and parallel LED drives. This article is from Planet Analog magazine.
Motor microstepper translates into simpler designs Product News 4/8/2005 Post a comment Allegro MicroSystems' A3982 is a complete bipolar motor driver IC with input logic translator to simplify motor stepping and direction for basic office automation and industrial applications. In general operation, this PWM-type device drives the motor one step for each input pulse. There are no phase sequence tables or high-frequency control lines, or complex interfaces for the designer to program.
Integrated video filter targets HDTV apps Design How-To 4/8/2005 Post a comment This video filter from Fairchild Semiconductor is selectable for standard definition (SD), progressive scan (PS) or high definition (HD) standards, and offers tri-level sync and a bypass mode that permits the passing of 1080p and HDTV signals.
Buck regulator is the most compact Product News 4/7/2005 Post a comment Sipex Corporation's SP7653, the newest addition to the company's PowerBlox series of ultraminiature buck regulator ICs, runs at the highest switching frequency in the family to cut overall real-estate requirements by 60 to 70 percent (thanks to a much smaller inductor) compared to its closest family member. The chip, in a 4-by-7 mm DFN package and working at 1.3 MHz, delivers 3 amps at output voltages down to 0.8 volt for applications such as cable and DSL modems.
16-bit converters optimized for precision measurement apps Product News 4/6/2005 Post a comment Extending its delta-sigma data converters offering, Texas Instruments Inc. (TI) today introduced a pair of high-speed, high-precision analog-to-digital converters (A/D converters) for very linear high-speed operation, and demanding measurement applications in scientific instrumentation, automated test equipment, data acquisition, medical imaging and vibration analysis.
An introduction to digital Circuits - Part 6 of an introduction to analog circuit design Design How-To 4/5/2005 Post a comment There are many good reasons to mix analog and digital circuits, writes Reno Rossetti. In this final part of his tutorial on analog building blocks, he looks at fundamental digital building blocks. Understanding the logic gates allows them to build higher level functions like flip-flops, shift registers and communications I/O. They even build the control logic for power management ICs. Part 6, the final part of this tutorial series, shows how.
Philips' RFID chip solution supports next-generation EPCglobal spec Product News 4/5/2005 Post a comment Philips Electronics has supplied first engineering samples of an RFID chip compliant with EPCglobal's Ultra High Frequency (UHF) Electronic Product Code (EPC) Class 1 Generation 2 (G2) standard. With an increasing number of mandates from major retailers and organizations such as the Department of Defense, Consumer Packaged Goods (CPG) companies and other suppliers around the world are moving towards implementing RFID technology in their supply chains.
SiGe Semiconductor WiMAX transceiver has multiple baseband interfaces Product News 4/5/2005 Post a comment SiGe Semiconductor has announced a transceiver chipset designed to optimise performance of WiMAX systems, broadband wireless access (BWA) applications, and wireless local loop equipment. The transceiver features a broad transmit tuning range and multiple baseband interfaces, allowing equipment manufacturers to reduce cost and time-to-market by re-using a proven RF chain to address worldwide requirements.
RoboGames: battling bots, but no killer app News & Analysis 4/4/2005 Post a comment Steve Ohr showed up at the RoboGames in San Francisco last week, snapped some pictures and talked to some people. Local television and CNN News were quick to capture the clatter and sparks of the robot combat machines, Ohr observed. Events which required more intelligence and programming school, such as maze-running, fire-fighting, autonomous navigation — even Aibo soccer — were more difficult to sit through, he said. They point to many more years of applications development. Here is
PMBus, MCUs and You Power DesignLine Blog 4/4/2005 Post a comment "Make no mistake about it," says Don Alfano of Silicon Labs, PMBus will forever change the way system power management is implemented, and your next design won't be competitive if it isn't PMBus enabled.
A/D converter performance guaranteed Product News 4/4/2005 Post a comment National Semiconductor Corp. today introduced 12 low-power, 10- and 12-bit analog-to-digital converters (A/D converters) that offer guaranteed performance across three speed ranges between 50 kilosamples per second (Ksamples/s) and 1 megasamples/s (Msamples/s).
Infineon's GEMINAX PRO Low Power ADSL2+ Chipset is first class D-based design Product News 4/4/2005 Post a comment Infineon Technologies has launched GEMINAX PRO, the industry's highest-integration and lowest-power ADSL2+ chipset. Consisting of a 16-channel ADSL2+ Digital Front End (DFE) and a 4-channel Analog Front End (AFE), with integrated low-power Class D line drivers, the chipset reduces power dissipation, footprint and overall system costs by up to 30%, in comparison to other chipsets currently available.
Settable equalizer increases copper throughput to 6.25 Gbits/s Product News 4/4/2005 Post a comment A settable analog equalizer boosts the integrity of NRZ data patterns at 6.25 Gbits/s data rates, and legacy application frequencies of 2.5 Gbits/s, 3.125 Gbits/s, and 5 Gbits/s. The device has the small size and low power consumption of fixed-frequency equalizers, and the flexibility of self-adaptive types " without any of their data errors. Steve Ohr took a briefing with company principals, and generated this review.
Driver ICs illuminate LEDs for small signage Product News 4/1/2005 Post a comment The HV9921/22 family of three-pin constant-current ICs from Supertex is suited to driving low-current LED strings in signage and general lighting applications. These buck-controller chips can be powered from a 20- to 250-volt DC source derived from a universal mains source with front end rectifier. The HV9921 delivers 20 mA, and the HV9922 provides 50 mA.
Dual PWM dials into telecom, consumer apps Product News 4/1/2005 Post a comment Intersil Corporation's ISL6440 is a dual PWM controller IC optimized for converting wall adapter, battery or network intermediate-bus DC input supplies into the system supply voltages required for a wide variety of datacom, telecom, and consumer products.