SigmaTel profit falls, foresees loss News & Analysis 1/31/2006 Post a comment Mixed-signal multimedia semiconductor supplier SigmaTel Inc. reported fourth-quarter earnings of $4.6 million, or 12 cents per share on sales of $82.0 million, compared to $19.5 million, or 52 cents per share on sales of $78.6 million in the year-ago quarter.
How to design a dimming fluorescent electronic ballast Design How-To 1/30/2006 1 comment Dimming fluorescent lamps is an attractive feature that provides mood and brightness effects as well as having tremendous energy savings potential. But how can you design one. It is a difficult task that requires knowledge of fluorescent lamp electrical behavior, control theory experience and resonant converter design skills. Learn how with this article.
PoE controller can be powered from AC adapter Product News 1/27/2006 Post a comment National Semiconductor says its LM5071, for power-over-Ethernet (PoE) applications, is the industry's first single-chip PD controller with DC/DC converter that can be powered from alternative sources such as an AC adapter.
8-MHz buck regulator suits ultra-thin portables Product News 1/26/2006 Post a comment Micrel says its MIC2285 is the industry’s first 8-MHz, 500-mA synchronous buck regulator for portable applications. As such, the regulator, working off a 2.7- to 5.5-volt input, is suited for space-sensitive applications including ultra-thin cell phones, PDAs, GPS systems, digital cameras, and portable media players.
IR meets guidance, expects flat quarter News & Analysis 1/26/2006 Post a comment Semiconductor supplier International Rectifier Corp. posted GAAP net earnings of $24.3 million, or 34 cents per share on sales of $278.8 million in its second fiscal 2006 quarter ended December.
High-performance controllers boost the PoE connection Product News 1/26/2006 Post a comment PoE product recap - With power-over-Ethernet (PoE) the closest thing to “the next big app” in the largely mature power area, vendors are bringing new controller systems to market with higher levels of integration, higher power capability, and a lower cost per port.
No need to fear: SEPIC outperforms the flyback Design How-To 1/25/2006 Post a comment This apples-to-apples comparison of SEPIC versus flyback dc/dc converter topologies is not based only on simulation, but on actual circuits. It's revealing, illuminating, and informative, if power-supplies are your concern. And even if your specifics are different, this article will help you understand the issues and figures of merit.
Strong power amp sales drive RF Micro profit News & Analysis 1/24/2006 Post a comment RFIC semiconductor supplier RF Micro Devices Inc. posted net earnings of $14.7 million, or 7 cents per share on sales of $208.0 million in the third fiscal 2006 quarter ended Dec. 31, 2005, up from $0.58 million on sales of $168.9 million in the year-ago quarter.
12-bit A/D converters tout low power Product News 1/24/2006 Post a comment Austriamicrosystems today launched a family of fully differential 12-bit, 8-channel, 400 ksamples/s, low power analog-to-digital (A/D) converters for battery-powered remote sensor and data-acquisition devices.
SWIFT DC/DCs power DVDs to DSPs Product News 1/24/2006 Post a comment Texas Instruments' wide-input TPS5430 SWIFT converter delivers 3 amps at greater than 90 percent efficiency for consumer electronics and industrial point-of-load power systems. A second converter, the company's low-input TPS5413 synchronous step-down device, provides similar output for 5- and 3.3-volt distributed power systems and broadband and networking infrastructure.
MOSFET-driver chip boosts DC/DC efficiency Product News 1/24/2006 Post a comment Two new MOSFET-driver chips from Vishay Intertechnology, the SiC714CD10 and SiC711CD10, simplify the design of single and multiphase DC/DC converters and contribute to a significant increase in efficiency over discrete solutions.
Sipex settles shareholder suit News & Analysis 1/23/2006 Post a comment Analog IC supplier Sipex Corp. has announced that the Superior Court of the State of California approved the settlement of a shareholder suit against the company’s current and former directors and officers.
Audio amplifiers cut power consumption Product News 1/23/2006 Post a comment National Semiconductor Corp. expanded its ceramic speaker driver family today with two Boomer audio power amplifiers in tiny packages that are said to provide high capacitive loads for portable applications like cell phones, smartphones, and notebook computers.
Cloaking the non-idealities of DC-DC converter stability Design How-To 1/20/2006 Post a comment Power supply circuits present difficult integration challenges in the form of power density and delivery. The main challenge in power supply circuits is guaranteeing stability over a wide range of LC and load combinations. Here's a solution that can help meet your needs.
Reset ICs drop in at low cost Product News 1/20/2006 Post a comment STMicroelectronics' 20-strong series of three-pin reset ICs, the STM18xx series, are designed as lower current, low cost drop-in replacements for the industry standard DS18xx (Dallas/Maxim) series for voltage monitoring in high volume MCU-based applications.
Cree, Cal Micro report sales, earnings News & Analysis 1/19/2006 Post a comment Semiconductor supplier Cree Inc. reported net income from continuing operations of $20 million, or 26 cents per share, on sales of $105.6 million in the second fiscal 2006 quarter ended December.
Audio subsystem houses Class D speaker Product News 1/19/2006 Post a comment National Semiconductor Corp.'s audio subsystem with a mono Class D speaker driver is said to integrate all the analog and digital functions needed for smart phones and voice-over-Internet Protocol (VoIP) phones.
Fairchild posts fourth-quarter loss News & Analysis 1/19/2006 Post a comment Semiconductor supplier Fairchild Semiconductor recorded a net loss of $4.7 million, or 4 cents per share on sales of fourth quarter sales of $370.8 million, compared with net earnings of $15.8 million, or 13 cents per share on sales of $379.4 million in the year-ago quarter.
Fast switches put the reins on power draw Product News 1/18/2006 Post a comment Key features of recently released analog switches that can route audio signals from a variety of sources for portable applications from Analog Devices, Austriamicrosystems, Fairchild Semiconductor, Intersil, Maxim Integrated Products, Vishay Intertechnology and Texas Instruments include, fast switching time, low on resistance R(ON), low power consumption, dual and bidirectional versions and tiny packages.
Minimizing Servoamplifier-Sourced Noise Design How-To 1/17/2006 Post a comment PWM servo amplifiers energize servo motors with current waveforms under control of fast-rise voltage pulses. The faster the rise rate of the drive pulses, the lower the energy dissipation in the servo amplifier's MOSFET or IGBT power semiconductors, and amplifier efficiencies in 95% region become possible. Unfortunately, there's a rise-rate tradeoff: the faster the rise rate, the more likely is the amplifier to source noise currents that interfere with neighboring circuits.
Class D amp provides high audio power output Product News 1/17/2006 Post a comment STMicroelectronics unveiled a filterless 3-watt Class D power amplifier today for mobile phones and other portable applications that is said to provide higher audio power output while preserving and extending battery life.
Low power codecs extend battery life Product News 1/13/2006 Post a comment Texas Instruments' family of low-noise, stereo codecs with power consumption as low as 14 milliwatts (mW) promise to extend the battery run-time in portable applications like cellular handsets, MP3 players with record functionality and digital still cameras.
LED drivers, with staggered outputs, cut EMI Product News 1/11/2006 Post a comment Allegro Microsystems' A6278 and A6279 are 8- and 16-output LED drivers. They feature circuitry for detecting an open-LED condition and are reportedly the industry's only devices with a staggered output delay, thus improving noise (EMI/EMC) immunity.
Local area network switches protect consumer devices Product News 1/11/2006 Post a comment Pericom Semiconductor Corp.'s pair of mutliplexer/demultiplexer Gigabit Ethernet local area network (LAN) switches are said to sport the highest level of electrostatic discharge (ESD) protection for susceptible products ranging from PC's to televisions.
A Designer's Guide to CMOS RF Models Design How-To 1/11/2006 Post a comment CMOS RF models are important, but they need to be understood and updated to reflect changes in process technologies and applications; the BSIM3 to BSIM4 transition accomplishes this
Texas Instruments micro-power op amp targets battery-powered applications Product News 1/10/2006 Post a comment Texas Instruments has introduced a family of precision, micro-power op amps from the company's Burr-Brown product line. The OPA379 family operates within a 1.8 V to 5.5 V supply voltage range and features high performance single-supply operation, very low quiescent current (2.9 A) and low noise (80 nV/rtHz) relative to the quiescent current.