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ADAV400 multi-channel audio codec

19.01.2006

In the near future, ANALOG DEVICES will release the ADAV400 multi-channel audio codec for advanced audio signal processing.

The microcircuit has 4 analog stereo inputs and 4 analog stereo outputs, a digital tunable delay line up to 400 ms, a PWM interface for digital amplifiers. The microcircuit will be produced in the LQFP-80 package.

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Nanotube switch 13.01.2006

French researchers have made a switch from a nanotube. Scientists from the research division of the French Commissariat for Nuclear Energy have made an interesting electromechanical device out of a carbon nanotube.

A successful experiment was preceded by an accurate calculation. He showed that if both ends of a nanotube are fixed, suspended above a conductor, and an electrical voltage is applied to it, the nanotube will bend under the action of an electrostatic force.

The magnitude of this bend can be influenced by changing the length or type of the nanotube, the potential difference, and many other parameters. Scientists have made such a device and found that the nanotube really bends. And bending over, it can touch the electrode and become a switch, that is, close the electrical network - after all, carbon is a good conductor.

Moreover, after touching the electrode, Van der Waals forces begin to act, which do not allow the nanotube to straighten out, even if the voltage in the conductor that attracted it is very small. It is this feature that allows us to hope that on the basis of such devices it is possible to create storage devices that require very little energy to store a record.

Nanoswitches will also be useful for creating ultra-low force sensors, oscillators and ultra-fast switches in communications.

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