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EM4T (Energy Meter For Traction) - the energy meter for all international rail networks
LEM has developed the EM4T - an energy meter designed for use across all rail networks.

In its basic single-phase version, the EM4T energy meter can be used in all existing rail networks (600V to 3000V DC, 15kV / 16,7Hz and 25kV / 50Hz AC). It is the only multi-network energy meter able to measure both AC and DC currents and can therefore be used for cross-border traffic.

The EM4T obtained the PTB approval as designed and tested in accordance with any valid traction and accounting standards. The input variables(current and voltage) are connected to the EM4T measuring circuits via differential input designed for connection of all current and voltage transducers/transformers currently available on the market.

The energy values are collected and stored in load profiles. The measured data recordings contain details such as date, time, events such as network change, train numbers, frequency… The EM4T is available in accuracy classes 1%, 0,5%, and 0,2%.

Characteristics

Available in accuracy classes of 1%, 0,5%, and 0,2%
Can be utilized with power supplies (24V and 110V DC nominal)
4 input channels for metering of both AC and DC signals of any existing traction network (600V DC to 3kV DC, 15kV AC 16,7Hz, 25kV AC 50Hz)
Timeframe for storing the load profiles between 1 to 60 minutes
A modem has been integrated for data transmission in a ‘LEMABox’. The LEMABox is available as an option (the EM4T will be implemented in the same box)

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Hittite Microwave Corporation, the world class supplier of complete MMIC based solutions for communication & military markets, has introduced the HMC-C070 MicroSynthTM product, which is a fully integrated broadband synthesizer module. Operating from 5.5 to 10.5 GHz, the HMC-C070 MicroSynthTM delivers excellent phase noise performance, and is ideal for military radar, EW, ECM, test & measurement and lab instrumentation applications.

Combining high performance SiGe, GaAs pHEMT, and InGaP HBT technologies into a highly compact 1.36″ x 0.75″ hermetic package, the HMC-C070 MicroSynthTM delivers excellent phase noise performance of -117 dBc/Hz at 1 MHz, and features a hermetic package, which is significantly smaller than existing solutions. This broadband synthesizer also features auto and manually triggered sweep functions, making it a valuable building block for test and measurement applications. Typical output frequency range is 5.5 to 10.5 GHz with an average output power of +21 dBm, which is enough to drive two mixers. In fractional-N mode, the HMC-C070 MicroSynthTM can realize step sizes as low as 1.2 Hz, which is ideal for high performance frequency hopping communications systems.

The HMC-C070 also features fully integrated low noise regulators and an output buffer amplifier which results in excellent ripple rejection and output power performance. Specified for -40°C to +85°C temperature operation, the module features field replaceable SMA connectors, and is designed to withstand harsh environmental conditions. This rugged module may be upscreened to meet higher military standards upon request.

The HMC-C070 MicroSynthTM complements Hittite’s expanding line of frequency generation products which are available in die, SMT and connectorized module formats, with frequency coverage up to 46 GHz. All connectorized module products are available from stock and can be ordered via the company’s e-commerce site or via direct purchase order.

Hittite Microwave Corporation is an innovative designer and manufacturer of analog and mixed-signal ICs, modules, subsystems and instrumentation for digital, RF, microwave and millimeterwave applications covering DC to 110 GHz. Our RFIC/MMIC products are developed using state-of-the-art GaAs, GaN, InGaP/GaAs, InP, SOI, SiGe, CMOS and BiCMOS semiconductor processes utilizing MESFET, HEMT, pHEMT, mHEMT, HBT and PIN devices. Our custom and standard products support a wide range of wireless / wired communications and radar applications for Automotive, Broadband, Cellular/4G, Fiber Optics, Microwave & Millimeterwave Communications, Military, Test & Measurement, and Space markets.

Hittite Microwave Corporation
20 Alpha Rd.,
Chelmsford, MA 01824
978-250-3343 phone
978-250-3373 fax
www.hittite.com

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Central Semiconductor Corp. announces the release of the CMNTVS12V 12V Transient Voltage Suppressor package in the ultra-miniature SOT-953 surface mount case. This new circuit protection device can handle up to 18W of peak power and an ESD voltage of 8kV. Designed to protect static sensitive data interfaces against ESD damage, the low profile CMNTVS12V is ideal for small portable hand held electronic devices such as cell phones, digital cameras, memory card ports, music players, or any device with an active data port. The SOT-953 utilizes 61% less board space compared to four individual SOD-923 devices and has a nominal profile of 0.45mm. 5.6V and 6.8V versions may also be requested.

Pricing for the CMNTVS12V starts at US$ 0.12 each for 8,000 pcs on 7” tape and reel.

Applications:
• Memory Card Ports
• Instrumentation Data Ports
• Mobile Phone / Smart Phone data/charger port
• PDA and digital cameras data/charger port

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National Semiconductor Corp. (NYSE:NSM) today introduced WEBENCH® Visualizer, a powerful comparison and selection tool that enables engineers to rapidly select an optimal power system design. WEBENCH Visualizer creates a graphical snapshot of options across multiple criteria, such as power efficiency, footprint and system bill of materials (BOM) cost. Drawing from 25 different switching power supply architectures and 21,000 components, engineers can navigate through billions of power supply design alternatives in seconds. Design criteria can be modified and the real-time effects observed, allowing engineers to select the best DC-DC power supply based on their unique needs. “With WEBENCH Visualizer, National has enabled analog experts to be superior business decision makers because we’ve given them all of the tools to produce the best possible design in the shortest time,” said Phil Gibson, vice president of Technical Sales Tools at National Semiconductor. “We’ve also given non-power experts the ability to do extraordinary things with analog power designs.” National’s WEBENCH Visualizer tool supports a variety of power supply topologies such as buck, boost, buck-boost, SEPIC and flyback. Several alternative circuit configurations are also available to address specific needs like fixed-frequency and constant-on-time architectures as well as current-mode and voltage-mode control loops. With the broadest power parts library from 110 manufacturers, designers can specify a wide range of parameters:

• VIN from 1V – 100V
• VOUT from 0.6V – 300V
• Power up to 300W
• Efficiency up to 96 percent
• Frequency up to 3 MHz
• Footprint from 14 mm by 14 mm

How WEBENCH Visualizer Works
The WEBENCH Visualizer tool features an optimizer dial that enables engineers to “dial-in” their preference for footprint, system BOM cost and power efficiency. The tool instantly creates 50-70 designs from 48 billion possible design options. It then highlights the smallest and most efficient designs, with one recommended as a starting point for further optimization. A second visualizer control panel allows engineers to adjust their design options for voltage, current and temperature. In seconds, an updated set of solutions appears, highlighting each design’s topology, schematic, footprint, efficiency, operating values and BOM cost/count. The tool’s interactive filter allows engineers to further fine-tune the power supply design to meet the target system’s exact requirements. Once a design is selected, National’s WEBENCH design environment offers the ability to further tune and optimize that design through additional component options and electrical and thermal simulation. With the “Build It!” feature, National ships a custom power supply prototype kit within 24 hours. To view a video demonstration or begin an analysis with the WEBENCH Visualizer tool, go to www.national.com/visualizer. The WEBENCH Visualizer tool is an extension of National’s award-winning WEBENCH tools for LEDs and power design. These tools offer instant access to the latest simulation models, parametric data and package information, enabling designers to simultaneously compare the performance of multiple devices in multiple circuit requirements.

About National Semiconductor
National Semiconductor is a leader in analog power management technology. Its products include easy-to-use integrated circuits, PowerWise products that enable more energy-efficient systems, and SolarMagic products which improve the energy output of solar arrays. The company celebrates its 50th anniversary this year. Headquartered in Santa Clara, Calif., National reported sales of $1.46 billion for fiscal 2009. Additional information is available at www.national.com.