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Applikationsstudien sollen später die Forschungsergebnisse ergänzen. So wollen die Projektteilnehmer die die Entwicklung der Technologie mit Endverbraucher-Interessen abstimmen.

MTSW-115-07-F-S-135_Datasheet PDF

Applikationsstudien sollen später die Forschungsergebnisse ergänzen. So wollen die Projektteilnehmer die die Entwicklung der Technologie mit Endverbraucher-Interessen abstimmen.

SAN FRANCISCO &#151 At the International Solid-State Circuits Conference (ISSCC) here, a team from the Massachusetts Institute of Technology (MIT) described an analog bionic ear processor” with zero-crossing detection for the hearing impaired.

Built around a 1.5-micron BiCMOS process from AMI Semiconductor Inc. (AMI), the processor is an analog device that is designed to replace traditional cochlear implant devices for those who are deaf or experience hearing loss.

MTSW-115-07-F-S-135_Datasheet PDF

Cochlear implant devices provide sound perception through direct electrical stimulation of the hearing nerve. The electrical stimulation bypasses the inner ear, which is the most common culprit of hearing loss.

A cochlear implant consists of internal and external devices. The internal device is surgically implanted under the skin and is comprised of a receiver, a magnet, and a bundle of fine wires. The external device includes the sound processor, a cable and a microphone, which is housed in an earpiece.

These devices are power-hungry products. They are also done in the digital domain by digitizing the output of a microphone front-end and feeding it to a digital signal processor (DSP).

MTSW-115-07-F-S-135_Datasheet PDF

MIT proposes a better solution in the analog domain, which is said to reduce power consumption for these applications. The bionic ear processor” is based on a single chip that measures 9.23- x 9.58-mm2 . The chip consists of a microphone front-end circuit, an automatic gain control circuit, bandpass filters, envelope detectors, a logarithmic A/D device and a digital output product.

The entire device could be implanted in a body and can run on a 100-mAh battery with at most 1000 wireless recharges and no battery replacements for at least 30 years,” according to MIT.

MTSW-115-07-F-S-135_Datasheet PDF

In this chip digitizing is delayed to the very end while there is still room for 750-microWatts of stimulation power,” according to MIT. The input to the chip is current from the drain of a Knowles FG3329 electret microphone and the output of the chip is a 7-bit number that represents the log spectral envelope energy of each of 16 channels with a sampling rate for each channel programmable from 500Hz to 2kHz.”

MANHASSET, N.Y. — Following the resolution of Nextel Communications' spectrum problems, the carrier's next challenge will be to merge its spectrum hodge-podge into Sprint Corp.'s frequencies. Sprint is in the process of acquiring Nextel.

Features include over-current and over-voltage protection, remote sensing, output adjustment trim, and remote on/off capability. The units, measuring 0.9-by-2.28-by-0.33 inches, share the industry-standard eighth-brick pin-out. In addition to being RoHS compliant, the DC-DC converters are CE marked and safety approved to UL60950, CSA60950 and EN60950 specifications.

The PAE50 and PAE100 series are available now, with prices starting at $38 each in 1k-unit quantities.(800) LAMBDA-4www.lambda.com

PARIS – Déception chez Thales. Au titre de l’exercice 2004, le groupe français d’électronique de défense publie un chiffre d’affaires de 10,288 milliards d’euros, en baisse de 2,7% par rapport à 2003. A périmètre et taux de change constants, la variation est limitée à -0,25%.

Par voie de communiqué, Thales a indiqué jeudi (10 février 2005) que les variations de périmètre de consolidation (essentiellement la déconsolidation de Thales Geosolutions, cédée fin 2003) ont eu pour effet une sortie nette de chiffre d’affaires de 239 millions d’euros. En revanche, les fluctuations des taux de change d’une année sur l’autre n’ont eu qu’un impact global faible, de -15 millions d’euros. Il apparaît, en effet, que la baisse du dollar américain a été annulée par la hausse de la livre sterling et du dollar australien.

Au cours de l’exercice 2004, la part des ventes réalisées en Europe a progressé de 58% à 61%. La raison est double : d’une part, la hausse du chiffre d’affaires au Royaume-Uni, grâce au dynamisme de l’activité défense (optronique et naval), a permis de compenser l’effet de déconsolidation de Thales Geosolutions et, d’autre part, l’activité en France (programme Rafale, système de défense aérienne, communications, systèmes d’informations) a enregistré une croissance honorable.

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