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发帖时间:2021-06-15 03:01:01

« Notre système s'apparente grosso modo au liquide de refroidissement d'un moteur de voiture », souligne M. Krupenkin. « Le radiateur est l'équivalent d'un dissipateur thermique (situé au-dessus du microprocesseur) et le moteur serait l'équivalent du microprocesseur en tant que tel », ajoute-t-il.

Plymouth, Mich. — Optrex America's new T-51750 6.5-inch diagonal color TFT LCD module with VGA resolution incorporates a range of new features including an ultra-slim outline, high front-of-screen performance, and economical chip-on-glass (COG) construction. Applications include medical diagnostic, test and measurement, marine/GPS, home appliance, office equipment, avionics and automotive.

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The T-51750 module offers a slim, symmetrical outline, measuring 158.0 (W) x 120.36 (H) x 7.0-mm (11.55 mm, including component height). With a luminance of 400 nits and a 300:1 contrast ratio, it provides excellent front-of-screen performance, said the company.

The Optrex T-51750 module is supplied with two field-replaceable CCFL backlights with a minimum lifetime of 30,000 hours. Key features include low power consumption (4.8 W) and an anti-glare, low reflectance (AGLR) coating.

The module is supplied with a reverse-scan capability that enables users to select either a normal scan or reverse scan to obtain the best image (depending on whether the mounted display will be typically viewed from above or below).

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Pricing for the T-51750GD065J-FW-AA 6.5-inch module is $213.00 in OEM quantities.

Call (734) 416-8500www.optrex.com

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El Segundo, Calif. – International Rectifier's IR3101 is a complete driver IC with proprietary HVIC and latch-immune protection for appliance motor drives. The chip simplifies half-bridge inverter designs for one-, two- or three-phase motor drives for refrigerator compressors, fans and pumps up to 400 watts (up to 250 watts with no heat sink).

The output features two built-in HEXFET power MOSFETs, with FredFETs for better noise immunity and low losses. Propagation delays for the high- and low-side power FredFET devices are matched for better synchronized switching characteristics and lower output distortion. The device can operate up to the maximum input voltage rating of 500 volts up to 150&degC. Its fully-isolated MiniSIP package includes ESD protection on all leads and has isolation ratings to 1500V rms (minimum).

Currently, there are ongoing efforts within a number of communication application standards bodies have included ECC as a required or recommended security mechanism. These efforts include:

Wrap Up Since ECC is an extremely efficient compact algorithm, it makes fewer processing demands on resource-constrained devices than RSA. In addition, it is standardized, ensuring interoperability between devices. And, as a well-researched and proven system, it answers manufacturers' concerns about reliability.

Ultimately, the benefits of ECC are many: linear scalability, a small software footprint, low hardware implementation costs, low bandwidth requirements, and high device performance. For these reasons, ECC has gained the support of a number of leading companies and recently received a strong validation from the NSA.

It's clear that security is an essential component of communication today and will continue to be so for the long term. As this article has shown, ECC is a superior algorithm when it comes to enabling that security. Since it offers the highest strength-per-bit of any public-key cryptography system known today, there should be no doubt that ECC is the next generation of public-key cryptography.

About the Author Scott Vanstone is the founder and executive vice president of strategic technology at Certicom. He is also a professor of mathematics and computer science at the University of Waterloo. Scott holds a Ph.D. from the University of Waterloo and can be reached at .

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