296 results found for TechView: Communications, displaying items 1 - 20
August 28, 2008 IC Power Amp Targets Mobile WiMAX Apps
The mobile version of the WiMAX broadband wireless technology is beginning to roll out as laptop manufacturers add it to their PCs and as other companies make wireless access points for the home and office. Now, all of these designers have access to a WiMAX power amplifier (PA) thanks to SiGe Semiconductor. The SE7262L is a 2.5-GHz PA for batterypowered devices. It delivers 28.5 dBm of output power (708 mW) with an efficiency of 20%—not bad...
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Louis E. Frenzel
July 24, 2008 Cut Cost, Power While Delivering 10-Gbit/s Ethernet Over 30 m Of Copper
Designers can deliver up to 10 Gbits/s of Ethernet over 30 m of copper cable thanks to a pair of developments from Phyworks Ltd. The 24 AWG twin-ax cable is terminated in SFP+ connector assemblies that employ the company’s PHY2060 active equalizer, CDR, and retimer IC (see the figure). The PHY2060 was originally developed for optical-fiber applications, but it adapts well to the copper...
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Louis E. Frenzel
July 24, 2008 Powerline Modem Uses OFDM To Overpower Noise And Transmit Data Reliably
Powerline communications (PLC) has been available for many years, but it hasn’t always lived up to its expectations. Electrical utilities regularly use the technology to monitor and control ac power lines. Some companies have even tried offering broadband Internet services. But the high-speed limitations of the ac lines as well as noise and interference issues have impeded its progress. Still, designers can use PLC for monitoring and control...
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Louis E. Frenzel
July 24, 2008 Five-Port Ethernet Switch Targets Cost-Sensitive Low-Port Apps
The KSZ8995FQ five-port Ethernet switch from Micrel targets applications with low port counts like industrial Ethernet, managed media converters, and fiber to the premises (FTTP) customer premise equipment (CPE) where low bill of materials (BOM) costs are essential. It includes five full 10/100-Mbit/s transceivers, five media access control (MAC) units, a high-speed non-blocking switch fabric, a dedicated address lookup engine, and an on-chip...
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Louis E. Frenzel
July 9, 2008
Optical Interface For HD video In Home Entertainment Systems Makes Sense
The Omron Electronic Components SX51 fiber-optic cable assembly includes a transmitter and receiver module on each end of the cable, making it bidirectional. It’s designed to address the data-transfer challenges inherent in the uncompressed bandwidth-intensive applications associated with HDMI rev. 1.3-compliant HD video and HDCP Video extender markets.
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Louis E. Frenzel
June 12, 2008 AC Powerline Connections Still A Viable Home Networking Choice
Using the ac powerline at home to interconnect PCs, peripherals, and consumer electronics via broadband techniques isn’t new. Several companies still make powerline modems. However, the wireless approach to home networking using Wi-Fi has become the most widespread networking option. It’s fast and convenient, and it doesn’t require any new wires. But you can also say that about the other home networking options. MoCA uses the installed base coax cable in a home,...
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Louis E. Frenzel
April 24, 2008 Superior Dispersion Compensation Paves The Way For 40- And 100-Gbit/s Fiber Transmission
The primary limiting factor in transmitting very high data rates on fiber-optic cable is signal dispersion. Dispersion is the lengthening of a pulse over distance due to the variation of the speed of light through the fiber at different wavelengths. Also called chromatic dispersion, it can be minimized but not eliminated. However, designers can compensate for it. Dispersion is holding back the deployment of 40- and 100-Gbit/s fiber transmission systems. As Internet traffic grows and...
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Louis E. Frenzel
March 13, 2008 Smaller SFP+ Optical Transceivers Save Space And Power
The lower cost and wider availability of network interface cards (NICs) and other optical components have led to the recent upsurge in 10-Gigabit Ethernet (10GE) networking. According to a recent report by research firm IDC, installation of 10GE ports will more than double from 1.4 million in 2007 to over 3 million by 2010 as more and more network switches and other datacom equipment adopt 10GE technology. Avago’s SFP+ (small form-factor...
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Louis E. Frenzel
March 13, 2008 Access Processor Aggregates Multiple Protocol Traffic For Carrier Ethernet Transmission
An excess of acronyms represents the protocols used in carrying various types of data traffic. Nowhere is this more profound than in cellular communications, where basestations must maintain the older legacy protocols as well as implement all the new ones. The challenge in making equipment that can handle this job lies in pulling all those different protocols together and transmitting them over a lower-cost medium. That lower-cost medium is...
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Louis E. Frenzel
March 13, 2008 GPON Platform Ready For FTTH Rollout
The adoption of passive optical networks (PONs) is growing as large carriers like AT&T and Verizon implement their video and data plans for consumers. Many smaller local carriers are beginning to offer fiber to the home (FFTH) systems as well. PONs are also being adopted worldwide in Japan, France, and China. While growth is evident, though, PONs haven’t hit the accelerator to faster adoption. In the meantime, chip vendors are beginning to offer silicon...
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Louis E. Frenzel
January 31, 2008 Chips Help Carrier Ethernet Replace Legacy Networking Solutions
With the Brooklyn-10 and Hudson large-scale networking chips from Lightstorm Networks, designers can use carrier Ethernet to replace existing Sonet/SDH and ATM/frame-relay infrastructures. The Hudson is an operations, administration, and maintenance (OAM) service accelerator or coprocessor for the Brooklyn-10 carriergrade, 20-Gbit/s layer 2 switch. Carrier Ethernet is scalable. It provides service management, quality of service, protection, and voice and circuit...
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Louis E. Frenzel
November 5, 2007 Ethernet Transceiver First To Include IEEE-1588 Precision Time Protocol
By far, Ethernet is the most widely used local-area networking (LAN) technology. More than 90% of all LANs use it in some form, wired by CAT5 or CAT6 or even wireless. Now, the industry is beginning to adopt Ethernet for a wide variety of automation, data-acquisition, test and measurement, and other real-time applications. Yet one of the biggest problems with Ethernet in industrial applications is the non-deterministic nature of the data ...
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Louis E. Frenzel
November 5, 2007 Quad Equalizer Lets You Go Faster And Longer With High-Speed Serial Channels
When implementing systems using gigabit serial data transmissions in cables or in backplane transmission lines, you're very limited in the lengths you can achieve because of the severe attenuation and distortion. An established way to compensate is to use equalization at the receiver. The equalizer anticipates the distortion and adds corrective measures that enable you to implement higher-speed interfaces over longer signal paths. Now, you can buy...
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Louis E. Frenzel
November 5, 2007 Serial-To-Wi-Fi Module Enables Wireless M2M Without Programming
Connecting a device to the Internet for remote monitoring or control in machine-to-machine (M2M) applications isn't easy. Yet Wi-Fi is quickly becoming the most asked for requirement in M2M applications, such as point of sale, medical devices, and security. While the hardware is well known, the project is more of a software development effort. Now you can add Internet connectivity via any Wi-Fi 802.11 wireless local-area network (WLAN) access point or hot spot with a...
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Louis E. Frenzel
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