Pragmatic TCM Using 8-PSK in Satellite Communications Design How-To 4/30/2002 Post a comment Satellite transponders employ specialized modulation schemes to improve bandwidth utilization. S. Jayasimha of India's Signion Systems describes the implementation of a Trellis-coded modulation technique using an "industry standard" 64-state, rate 1/2 convolutional code on M-ary PSK constellations.
Year-old Bermai packs all functions for 5-GHz wireless LANs in one chip News & Analysis 4/29/2002 Post a comment LAS VEGAS -- In a move that's certain to raise the stakes in wireless local area networks, startup Bermai Inc. plans to formally launch its single-chip solution for 5-GHz wireless LANs at the NetWorld+Interop trade show here this week. The year-old fabless chip company is jumping into a crowded market, claiming to be the first to offer a single "radio chip" for the emerging 802.11a wireless LANs.
IXYS to acquire Clare in $55 million merger deal News & Analysis 4/23/2002 Post a comment SANTA CLARA, Calif. -- Power semiconductor maker IXYS Corp. here today announced an agreement to acquire Clare Inc. of Beverly, Mass., a supplier of high-voltage ICs, solid-state relays, mixed-signal ASICs and drivers for organic light emitting diode (OLEDs).
Intrinsity aims 2-GHz Adaptive Signal Processors at beating DSPs News & Analysis 4/22/2002 Post a comment AUSTIN, Tex. -- In a move to applying its dynamic logic technology to high-speed embedded processing applications, Intrinsity Inc. today announced plans to offer a 2-GHz adaptive signal processor, based on a matrix-computing engine and a souped up 32-bit RISC core, licensed from MIPS Technologies Inc.
Xicor buys analog development startup to expand mixed-signal efforts News & Analysis 4/17/2002 Post a comment MILPITAS, Calif.--Xicor Inc. today announced it has acquired privately-held Analog Integration Partners LLC, a developer of analog signal processing and data conversion circuits based in Milpitas. The purchase was completed on Tuesday for $15 million in stock and cash, said Xicor, also based in Milpitas.
Programmable EMI for automotive microcontrollers News & Analysis 4/17/2002 Post a comment A typical high-end car of today makes use of 50 to 60 microcontrollers to perform tasks in all areas. Today's high-end microcontrollers in automotive applications are 32bit processors running at 50MHz clock speed and more. The problem is that these microprocessors interfere electromagnetically with other applications in the car, like the audio entertainment system or other parts of the control system. There are several methods that can be used to keep EMI to an absolute minimum.
Integrated active video filters in multimedia News & Analysis 4/17/2002 Post a comment The increased demand for consumer multimedia systems challenges system designers to provide cost-effective solutions to capitalise on the growth potential in graphics display technologies. These applications will require cost effective filtering solutions to deploy high-quality display technologies rapidly and effectively to the target audience.
Precision thermal monitor makes simple (yet accurate) heat source News & Analysis 4/15/2002 Post a comment Fred Hamilton's circuit uses thermal coupling between a transistor diode and a load resistor to read temperature and airflow. (We redrew the circuit for publication in Planet Analog magazine, but we could resist reproducing Fred's hand-drawn diagram here: It reminded us so much of the "pease-o-grams" from . . . you know . . . that other famous National guy.
ST to buy Alcatel Micro for $343 million, sell mixed-signal business to AMI News & Analysis 4/15/2002 Post a comment PARIS -- In a complex series of transactions, STMicroelectronics today announced it has agreed to acquire Alcatel Microelectronics from telecom giant Alcatel SA for 390 million euros ($343 million) in cash. But in an usual twist, STMicroelectronics turned around and announced it had also agreed to sell the mixed-signal business of Alcatel Microelectronics to AMI Semiconductor Inc. of Pocatello, Idaho.
Wireless hits data rate barrier News & Analysis 4/15/2002 Post a comment Broadband wireless access systems are faced with a major challenge: to provide subscribers with high data rates over nonline-of-sight fading channels at wireline reliability. The requirement for high reliability arises from performance expectations set by competing broadband technologies-namely, cable modems and digital subscriber lines, both of which operate over wires.
OFDM kills multipath distortion News & Analysis 4/15/2002 Post a comment High-spectral-efficiency quadrature amplitude modulation (QAM) is used over many communications media such as twisted pair, coaxial cable, fiber optics and radio to carry high-speed digital communications.
Free-space optics leaps last mile News & Analysis 4/15/2002 Post a comment While the fiber-optic backbone is already widely installed, only 5 percent of commercial buildings in the United States have fiber to their door, even though most are within a mile of a fiber-optic line, and many are within a few hundred feet.
Fixed wireless access rides wave of support News & Analysis 4/15/2002 Post a comment Despite the much-publicized demise of fixed broadband wireless access (FBWA) providers such as Winstar and now XO Communications, and the cessation of rollouts by Sprint and Worldcom, the FBWA market is alive and well, thanks to a ground-swell of support for wireless Internet service providers (W-ISPs) operating in the unlicensed bands.
Adaptive biasing offsets temp drift News & Analysis 4/8/2002 Post a comment The main objective of an electronic circuit that deals with sensors is to provide a "clean" signal to a control unit that behaves in a directly proportional way to the physical quantity to be measured.
Canada's SiGe Semi moves into fiber optics IC market News & Analysis 4/8/2002 Post a comment OTTAWA, Canada -- SiGe Semiconductor Inc. today announced its entry into the IC market for optoelectronics with the launch of two transimpedance amplifiers and an automatic gain control device for fiber-optic modules in routers, modems and cross connect systems supporting 2.5-gigabits-per-second OC-48 and STM-16 transmission rates.
UMC and Micronas collaborate on flat-panel video TV chip News & Analysis 4/2/2002 Post a comment HSINCHU, Taiwan -- United Microelectronics Corp. here and Germany's Micronas GmbH announced collaboration in the production of a new low-cost flat-panel video controller IC, using UMC's 0.18-micron mixed-signal CMOS process technology. The device, designed by Micronas, is aimed at simplifying and lowering the cost of video and TV in systems using liquid-crystal displays (LCDs) or plasma displays instead of picture tubes.
Blog Doing Math in FPGAs Tom Burke 2 comments For a recent project, I explored doing "real" (that is, non-integer) math on a Spartan 3 FPGA. FPGAs, by their nature, do integer math. That is, there's no floating-point ...