Cutting RF power in W-CDMA phones News & Analysis 6/30/2004 Post a comment The spread-spectrum wireless communications standard, IS-95/3GPP, embodies stringent specifications for linearity and adjacent-channel power ratio (ACPR), says this Maxim engineer. The power amplifier does not operate continuously in voice mode. When the phone user isn't speaking, it runs at a half rate (50 percent of the time) or at a one-eighth rate, so there's no worry about the phone's heating during voice mode. But in data mode the PA runs continuously until the data transmission is complet
Power reduction remains top priority for 3G mobiles News & Analysis 6/30/2004 Post a comment Earlier this year, Vodafone chief executive officer Arun Sarin said that product quality deficiencies would slow the rollout of third-generation (3G) mobile phones. They are bulky, they get hot, and they don't have enough battery life," he said. Rob Keenan uses this as the kick-off point from an EE Times' article package on cell phone power managmenet. The big issue is in W-CDWA power consumption, he warns.
DVD players, LCD screens driving DTV adoption News & Analysis 6/30/2004 Post a comment High-quality LCD and plasma screens capable of showing crisp, vivid images, coupled with the popularity of DVD players, are coaxing a growing number of consumers to buy digital televisions. For CMP's TechWeb.
MIT-Spinout plant Angriff auf Datenwandler-Markt News & Analysis 6/30/2004 Post a comment Mit 17 Millionen Dollar Risikokapital und einer streng geheimen Technik aus den Laboratorien des 'Massachussetts Institute of Technology' (MIT) will das Startup-Unternehmen Kenet den Markt für ultraschnelle A/D-Wandler aufmischen.
500-mA LDO stresses thermals Product News 6/29/2004 Post a comment Advanced Analogic Technologies' AAT3239
is a low-dropout regulator (LDO) designed for high continuous load currents and with particular attention to the device's thermal characteristics for maintaining an overall high level of performance. The 500-mA source, for battery-powered applications, features fast line and load transient response, high-speed turn-on and shut-down, and a high power-supply-rejection-ratio (PSRR).
Sharp takes stake in German TV manufacturer Loewe News & Analysis 6/28/2004 Post a comment Japan's Sharp Corp. is taking a stake in the battered German consumer electronics maker Loewe AG, a move that will allow Loewe to accelerate its move to flat-screen TV production. Sharp will hold a nearly 10-percent stake in Loewe worth 4.3 million euros ($5.2 million) in the form of a shared capital, the German company said. From Kronach, Germany, Christoph Hammerschmidt filed this report.
Low-power memory system for 3G designs News & Analysis 6/28/2004 Post a comment With the need to process increasing amounts of audio and video data, third-generation (3G) wireless devices now need mass storage along with significant performance and low power consumption.
Charge pumps offer low-power backlighting News & Analysis 6/28/2004 Post a comment One drawback to the new suite of features being added to mobile phones is the higher current consumption for display backlighting. Color LCDs require white light to provide backlighting for the best clarity, and typical white LEDs consume substantially more current than the green ones used in first-generation mobile phones.
SoC IP Blocks Solve the 3G Power Management Issues News & Analysis 6/28/2004 Post a comment At 130 and 90 nanometers, power consumption, both dynamic and static, is a major hurdle to overcome in the development of system-on-chip designs for third-generation (3G) cellular handsets and other battery-powered mobile applications.
Miniature VCXO Available In Frequencies Up To 180MHz Product News 6/24/2004 Post a comment Nihon Dempa Kogyo (NDK) announces the availability of the NV7050SA series, a miniature Voltage Controlled Crystal Oscillator (VCXO) available in the frequency range of 1.544~180MHz. The miniature hermetically sealed 6 pad SMD package measures only 7.0x5.0mm with a thickness of only 1.6mm. The NV7050SA delivers a CMOS output in the 1.544~80MHz frequency range and a PECL output in the 80~180MHz frequency range.
New, larger OLED displays for mass production Product News 6/24/2004 Post a comment One Stop Displays is the first to offer a 1.6" color OLED in mass production quantities. The new 1.6" offers 262k color depth, a digital interface, and the same spectacular viewing characteristics representative of organic technology.
Broadband gain amplifier has best distortion characteristics in class Product News 6/24/2004 Post a comment A new 850 MHz programmable gain, broadband amplifier from Linear Technology has the best distortion characteristics of any amplifier in its class. The LT5514 exhibits an output third-order intercept (OIP3) of 49dBm at 70MHz, and has 2nd and 3rd order distortion products lower than -87dBc, while delivering 2V peak-to-peak output into a 200-Ohm load. Its combination of low noise and high spurious-free output capability makes it ideal for 12- and 14-bit, 65Msps or faster A/D converters in high perf
Programmable skew control resolves clock network issues News & Analysis 6/23/2004 Post a comment Here's an admittedly promotional piece from our old friend Shyam Chandra at Lattice Semiconductor. Referencing the company's latest programmable clock generator " an outgrowth of the iSP programmable analog building blocks " the article does offer insights into ways complex clock trees can implemented.
Clamping circuit protects GSM power amplifiers News & Analysis 6/23/2004 Post a comment ANADIGICS has been granted a patent for a new active clamping circuit that protects GSM power amplifiers from damage under extreme operating conditions. The new clamping circuit is simpler than previous designs and takes up less board real estate.
Controller for bus converters allows greater than 95 percent efficiency News & Analysis 6/23/2004 Post a comment Intersil announced the release of the ISL6744, a double-ended controller intended for unregulated bus converters in 48-V DC-DC and off-line AC-DC power supplies. The ISL6744 controller works over a wide range of input voltages, and works with isolated-bus applications including 400-V power-factor-corrected AC/DC converters and 48-V intermediate buses for telecom, datacom, and server systems. It has been designed to provide efficiency optimization with its ability to accurately program the outp
65-MHz rail-to-rail amplifiers combine high speed and high drive current News & Analysis 6/23/2004 Post a comment Intersil's new EL5111 (single amp), EL5211 (dual amp), EL5411 (quad amp) and EL5611 (6X) offer a wide 65 MHz of bandwidth at -3 dB and an exceptional 90 V/s slew rate along with a common mode input ability beyond the supply rails and rail-to-rail output capability that enable maximum dynamic range at any supply voltage. The high 180-mA output short-circuit drive current capability helps ensure sharp pictures and stable brightness.
Freescale goes ZigBee with Developers Starter Kit News & Analysis 6/23/2004 Post a comment Freescale Semiconductor, provides manufacturers with a single-source ZigBee-Ready platform. ZigBee technology from Freescale enables wireless products for a variety of monitoring, automation, and control applications in the home, industrial, and health related environments.
Smart controller consolidates motor designs News & Analysis 6/23/2004 Post a comment Touting an increased level of integration, Apex Microtechnology has designed its MSA240 and MSA260 as complete "PWM amplifier" solutions for DC brush motor drives. These boards include a smart controller, oscillator, comparator, error amplifier, current-limit comparators, and a full-bridge output. The error amp also can be applied as a differential amplifier on the input to allow interfacing with most motor control chip sets.
Triple-regulator packs power punch News & Analysis 6/23/2004 Post a comment Linear Technology's LT1941, for xDSL, hard disk drives and microprocessor core applications, is a triple-output (nonisolated) switching regulator IC with internal power switches. Two step-down converters provide a nominal 1.8 volts at 2.5 amps and 3.3 volts at 1.4 amps and the third source can be configured as a boost, inverter (nominal -12 volts at 350 mA) or SEPIC converter.
Charge-pump for LED backlights touts 1% accuracy News & Analysis 6/23/2004 Post a comment Analog Devices says its ADM8845 charge pump, which has individual current-control blocks for six white light-emitting diodes (LEDs), achieves the most accurate current-matching in the industry - to within 1 percent for uniformly backlighting the micro color thick-film transistor (TFT) liquid-crystal displays (LCDs) used in cell phones, PDAs, and digital cameras. Two control inputs allow the LEDs to be switched on and off in two independent blocks (four LEDs, and two LEDs), suiting the ADM8845 fo
Programmable clock generator offers flexible skew control Product News 6/23/2004 Post a comment Lattice Semiconductor today introduced its revolutionary new family of ispClock in-system programmable clock generator devices. The first devices in the ispClock5500 family, the 10-output ispClock5510 and 20-output ispClock5520, combine a high- performance clock generator with a flexible, Universal Fan-out Buffer. The on-chip clock generator can provide up to 5 clock frequencies ranging from 10MHz to 320MHz using a high-performance PLL and clock multiply and divide facilities. The Universal F
New color LCD display drivers offer fast response for high speed moving images Product News 6/23/2004 Post a comment Dialog Semiconductor today launched the first two products in its new color liquid crystal display (LCD) driver family. Using multi-line addressing (MLA) LCD technology, the new DA8912A and DA8913A incorporate fully integrated graphic display RAM with high speed interfaces and various power management functions to enable a single, low power chip for managing the display in next generation mobile phone handsets and portable electronic products.
Moto's Freescale pegs IPO at $2.4 billion News & Analysis 6/22/2004 Post a comment Freescale Semiconductor Inc., the semiconductor subsidiary of Motorola Inc., confirmed plans to conduct an initial public offering of shares through the filing of an amended S-1 registration with the Securities and Exchange Commission.
NTT Docomo puts wallet's contents in phone News & Analysis 6/22/2004 Post a comment Tapping the contactless Felica IC communications technology embedded in four new phones for its i-mode mobile network, NTT Docomo Inc. will launch a service next month that puts electronic money, e-tickets, personal ID and other services onto i-mode handsets.
Controller for bus converters allows greater than 95 percent efficiency Product News 6/22/2004 Post a comment Intersil announced the release of the ISL6744, a double-ended controller intended for unregulated bus converters in 48-V DC-DC and off-line AC-DC power supplies. The ISL6744 controller works over a wide range of input voltages, and works with isolated-bus applications including 400-V power-factor-corrected AC/DC converters and 48-V intermediate buses for telecom, datacom, and server systems. It has been designed to provide efficiency optimization with its ability to accurately program the outp
65-MHz rail-to-rail amplifiers combine high speed and high drive current Product News 6/22/2004 Post a comment Intersil's new EL5111 (single amp), EL5211 (dual amp), EL5411 (quad amp) and EL5611 (6X) offer a wide 65 MHz of bandwidth at -3 dB and an exceptional 90 V/s slew rate along with a common mode input ability beyond the supply rails and rail-to-rail output capability that enable maximum dynamic range at any supply voltage. The high 180-mA output short-circuit drive current capability helps ensure sharp pictures and stable brightness.
Family of sigma-delta ADCs offers optimal combination of low noise, low power Product News 6/22/2004 Post a comment Analog Devices today introduced a new family of
sigma-delta analog-to-digital converters (ADCs) that deliver an unprecedented low-noise and low-power solution for applications in industrial and medical instrumentation markets. Unlike traditional precision data-converter solutions, which compromise on either power
or noise, the new ADCs feature both low noise (40 nVrms) and low power(400 uA), while offering a complete range of analog functions in less board area.
One button reset control turns microprocessor on and off News & Analysis 6/21/2004 Post a comment Even sitting in a drawer, your MP3 player still east power. To save battery life, it's best to turn off the central processor as well as its peripherals and power supply components, a Maxim guru says. Here's a one-button circuit for turning the whole thing off.
Thumb drives are hitching a ride to a speedy ramp-up News & Analysis 6/21/2004 Post a comment Thumb drives so called for their diminutive size are quickly becoming a mass-market phenomenon, but despite their capacious storage, they lack a couple of key attributes: They have no speed standards and you can't boot a Windows computer from them. Rick Merritt has this report.