353 results found for TechView: Communications, displaying items 1 - 20
October 29, 2009
SAW Oscillator Competes For Clock Duties Against Entrenched Crystal Oscillators
Crystal oscillators dominate the clock circuit space because of their superior precision, stability, and low cost. But Epson Toyocom offers some very attractive alternatives. Its EG-4101/4121A SAW oscillator has the stability and performance to challenge crystal oscillators in wireless basestations and LAN and SAN applications.
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Louis E. Frenzel
October 20, 2009
Low-Power Short-Range Radio IC Simplifies Product Wireless
Adding wireless capability has never been easier with RFM’s TRC105 transceiver, which covers from 300 to 510 MHz. It enables two-way wireless communications in a wide range of applications, including automated meter reading (AMR), medical, home and industrial automation, security systems, two-way remote keyless entry (RKE), automobile immobilizers, asset tracking systems, sports and recreation equipment, low-power two-way telemetry systems, wireless toys, and controlled entry/access.
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Louis E. Frenzel
October 13, 2009
SoC Integrates DSL, Wi-Fi, And Cordless Phone Functionality
Integrating more circuits onto smaller pieces of silicon real estate, the system-on-a-chip (SoC) is becoming the new norm in semiconductor devices. Broadcom’s BCM6362 is riding that wave, with an ADSL2+ modem, an 802.11n wireless local-area network (WLAN) transceiver, a Digital Enhanced Cordless Telecommunications (DECT) cordless telephone circuit, and Voice over Internet Protocol (VoIP) in a single 65-nm device.
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Louis E. Frenzel
October 13, 2009
Fast Crosspoint Switches Implement Migration To 10-Gbit Networking
If you’re designing core/metro routers, blade servers, network storage equipment, broadcast video routers, and other gear with physical-layer switches, you now can have a fast crosspoint switch to do the job. Vitesse Semiconductor’s VSC3314-11 and VSC3316 can switch, transmit, and recover high-speed signals over lossy PCBs, backplanes, and cable.
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Louis E. Frenzel
October 13, 2009
Clock Generator Beats All Jitter Specs For Broadcast Video Apps
The highly integrated Si5324 clock IC from Silicon Laboratories is optimized for professional broadcast video applications. It replaces traditional multi-component video PLL solutions with a single clock IC while providing 80% less jitter than competing solutions. It's ideal for video capture, conversion, editing, display, and distribution equipment that must be synchronized within video studios.
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Louis E. Frenzel
October 8, 2009 Man-Wearable Radio Implements Movable Tactical Mesh Network
Engineers in industrial environments probably have felt the need to connect some serial port device of interest to their Ethernet local-area network (LAN). Industrial devices still widely use RS-232 serial interfaces because of their robust nature. But making them accessible via your regular Ethernet LAN is tricky at best—at least, it used to be. The B&B Electronics Vlinx ESP211-232 mini serial server solves this problem (...
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Louis E. Frenzel
September 30, 2009
Connect Any RS-232 Device To Your LAN
Engineers in industrial environments probably have felt the need to connect some serial port device of interest to their Ethernet LAN. Industrial devices still widely use RS-232 serial interfaces because of their robust nature. But making them accessible via your regular Ethernet LAN is tricky at best—at least, it used to be. The B&B Electronics Vlinx ESP211-232 mini serial server solves this problem.
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Louis E. Frenzel
September 24, 2009 Cable TV Tuners Deliver Higher Performance WIth Ultra-Low Power Consumption
MaxLinear developed its MxL20xRF family of silicon tuners for the global digital cable market. These devices target set-top-boxes (STBs), digital video recorders (DVRs), cable modems, embedded multimedia terminal adapters (EMTAs), cable gateways, and cable-enabled televisions. The MxL20xRF family uses MaxLinear’s proprietary digital CMOS process to deliver the highest performance in accordance with the ANSI/ SCTE40, DOCSIS/EURODOCSIS, and ITU-T...
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Louis E. Frenzel
September 24, 2009 Dual RF Tuner Brings Flexibility To Satellite Set-Top Boxes
Satellite TV installations use a set-top box (STB) that works with a remote low-noise block (LNB) converter at the antenna so the Ku band signals (10.95 to 14.5 GHz) are downconverted to the 950- to 2150-MHz range, making them more friendly to the coax connection between the LNB and STB. But this creates compromises in multi-set installations, as extra wiring is often needed. Any other special arrangement typically results in a more complex and...
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Louis E. Frenzel
September 10, 2009
WLAN Chips Lower Cost And Complexity Of Home Gateway Products
The XWAY WAVE 1000 family of single-chip wireless local-area network (WLAN) ICs from Infineon provide a high-performance and cost-effective solution for wireless network access points that comply with the 802.11n draft standard for data rates up to 150 Mbits/s as well as the 802.11 b/g standard.
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Louis E. Frenzel
August 27, 2009 RF Front-End Modules For Bluetooth And ZigBee Simplify Layout And Cut Costs
Front-end modules are becoming hot wireless products because of the great benefits that they bring. The â??front endâ?? is usually considered the receiver low-noise amplifier (LNA), the transmitter power amplifier (PA), and the transmit/ receive (Tx/Rx) switch, as well as any additional impedance matching or filter components. In past designs, all of these components were individual parts that required extra design attention not to mention...
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Louis E. Frenzel
August 24, 2009
LNA Boosts ISM Band Performance Without Penalty
In many industrial, scientific, and medical (ISM) band wireless applications, receiver sensitivity greatly limits the range and reliability of the radio link. One way to get greater sensitivity is to add more gain. But that works well only if the noise figure is good enough. The Maxim Integrated Products MAX2634 solves that problem for some applications. This low-noise amplifier (LNA) for the 315- and 433-MHz ISM bands improves receiver sensitivity and offers an ultra-low 1.25-dB noise figure.
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Louis E. Frenzel
August 24, 2009
UHF And S-Band VCOs Offer Ultra-Low Phase Noise And High Harmonic Suppression
The ZRO0837H1LF voltage-controlled oscillator (VCO) from Z-Communications operates from 830 to 845 MHz. It offers a tuning voltage range of 0.5 to 4.5 V with a tuning sensitivity of 7 MHz/V. Meanwhile, the company’s CRO3562A-LF VCO suits the S band and operates from 3560 to 3564 MHz with a tuning voltage of 1.5 to 4.5 V and a sensitivity of 8 MHz/V.
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Louis E. Frenzel
August 24, 2009
WSN Platform Makes Remote Monitoring Easier Than Ever
The NI WSN is a plug-and-play system. Just add your sensors and away you go. Two WSN nodes available initially include the WSN-3202, available with four-channel analog I/O input units that handle inputs in the ±10-, ±5-, ±2-, or ±0.5-V ranges with a 16-bit analog-to-digital converter (ADC). The WSN-3212 has four thermocouple input channels with a 24-bit ADC with a sampling rate of 0.5 sample/s.
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Louis E. Frenzel
July 27, 2009
Patch Cord Provides Fiber Dispersion Compensation
Proximion Fiber Systems AB has introduced a fiber patch cord with built-in dispersion compensation (DC) for use in new and existing high-speed fiber networks. Dispersion is the limiting factor in reaching maximum data rates of 10 Gbits/s and higher without errors in fiber-optical systems. Special dispersion compensation products have been available, but this one comes in patch-cord form and can replace space-consuming boxes while saving money.
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Louis E. Frenzel
July 27, 2009
Linear, Low-Loss MOSFET Mixer Fits Radio Apps To 900 MHz
The PE4150 mixer IC from Peregrine Semiconductor suits use in radios in the 300- to 900-MHz range. This 50-? quad MOSFET core device also is ideal for mixer designs requiring low conversion loss and high linearity such as UHF portable radios. It can be used as an upconverting or downconverting mixer as well.
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Louis E. Frenzel
July 27, 2009
Upstream Cable TV Amplifier Boasts Low Power Consumption
As cable TV (CATV) companies upgrade their systems to the new DOCSIS 3.0 specifications, low power dissipation has become a major factor. While the downstream path is still the focus of most systems, the upstream needs have increased as more two-way monitor and control functions have been implemented and Voice over Internet Protocol (VoIP) systems have become common. The MAX3518 from Maxim Integrated Products addresses these upstream amplification needs.
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Louis E. Frenzel
July 8, 2009
Clock IC Uses GPS 1-pps Signal For Datacom Sync
Designers can use the widely available 1-pps Global Positioning System (GPS) satellite signal derived from onboard atomic clocks to achieve super-accurate clocks for critical networking and datacom applications. The Analog Devices AD9548 clock generator/synchronizer takes the 1-pps signal in and generates up to four synchronized outputs. It suits optical and wireless network nodes like basestations, cable infrastructure, and other equipment that requires the precision of a Stratum 2 clock.
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Louis E. Frenzel
July 8, 2009
Octal T1/E1/J1 Transceiver/Framer Keeps Legacy Backhaul Available
The bottleneck in most cellular systems implementing 3G and soon 4G data-centric networks is the backhaul. Legacy T1/E1/J1 wired telephone networks have sufficed for years. But wouldn’t it be nice if carriers could continue with the proven links? Exar is making that possible with its XRT83VL38 octal long-haul and short-haul line interface unit (LIU) for T1, E1, and J1 applications as well as its XRT86VX38 framer/line interface unit combo (LIU).
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Louis E. Frenzel
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