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Intersil has announced three new products  for video applications with signal transmission over coaxial or CAT 5 cabling. Two of these devices, the TW3801 camera modem PHY and the TW3811 receiver modem PHY, form part of the Security Link over Coax (SLOC) family. This is a new product family for Intersil, arising from the company’s springtime acquisition of Techwell, a fabless mixed-signal video IC provider. The third new offering is the ISL59601/2/3/4/5 series of MegaQ adaptive composite video equalizers.

The SLOC modems are designed for simultaneous transmission of an analogue composite video, blanking, and sync (CVBS) signal and digital IP video signal over a single coaxial cable over distances up to 500 m. The allows users to install newer, megapixel IP cameras without having to replace or modify their existing coax infrastructure.
This approach provides latency-free viewing and camera control, enabling system makers to build systems that support both latency-free closed-circuit TV and networked IP surveillance.

The devices in the MegaQ family are designed to automatically equalise video signals over both Cat 5 and coax and deliver excellent video quality at distances up to 1.6

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Researchers at the University of California at Santa Cruz (UCSC) have developed a new technique that utilises vapour-filled optical waveguides on a silicon chip to process data streams encoded by light, so the optical signals can be slowed down and switched on-chip. This avoids the current need to convert optical signals to electrical signals for applications that detect, buffer, multiplex or store photonic information.

In what is claimed to be the world's first demonstration of electromagnetic optical switching on a fully self-contained silicon chip, the technique utilises quantum interference effects in an on-chip hollow-core optical waveguide filled with rubidium vapour. A control laser is used to switch the optical signal on and off and to slow the data stream's speed by a factor of as much as 1,200.

The light from the control laser causes the rubidium atoms to adopt a coherent superposition of two quantum states, which makes the vapour transparent to the optical signal. This allows the channel to be switched on and off. This electromagnetically induce transparency allows optical signals to be both switched and slowed by a quantum effect, potentially enabling the fabrication of quantum communication networks using silicon photonic chips.

According to Holger Schmidt, an electrical engineering professor at UCSC, this technique could potentially be used to produce  fully optical switches, single-photon detectors, quantum memory devices, and other exciting possibilities. The researchers have already successfully used rubidium vapour waveguides to create an atomic spectroscopy device on a single chip, which the group fabricates as a set of 32 devices on a single silicon wafer.

Image: UCSC

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By: May Smith
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May Smith is a webmaster who manages a website about record keeping
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Glucose is a compound that is naturally found in the body. It supplies energy for the body and now, it is found to be capable of generating significant amount of energy that could possibly, if further improved, supply energy for implanted devices. This discovery is very significant to medical device suppliers (like pacemaker and artificial organs).

They call the technology as the "glucose biofuel cell". The device can convert the available glucose and oxygen into usable electricity. The device was tested by using two rats. It was implanted in the abdomen of the rats, and was able to attain the power of 6.5 microwatts. Wasn't bad, knowing that the standard pacemaker requires 10 microwatts to keep the heart beating properly. The device could nearly reach the standard power and if refined and improved could reach beyond that level. There is no reason why the device could not work in human. Researchers are very optimistic about improvement of its efficiency.

The question now is: how does this technology work inside a living body? Glucose, a source of energy for cells, is utilized by this device in generating energy. Enzymes are used to facilitate the oxidation process that causes the production of energy. Enzymes are contained in a graphite disc and protected by a dialysis bag. In this way the glucose and oxygen can enter while enzymes inside are prevented of going out. This technique also aims to protect the enzymes from an acidic environment because high acidity alters the process of oxidation. The process then produces a certain amount of energy. This energy is then transported to the machine.

Researchers are planning to test the "glucose biofuel cell" in larger animals. They are also looking forward for other improvements in their discovery, like making the device more biocompatible and prolonging its generating capacity. There will be a series of experiments that are expected to be done before the device can be practically used in humans. Maybe years from now, the device could be found in the market. Support from some companies could be a great help for its progress. The device may be very practical in the medical field. Glucose is an unlimited source of energy and it may be a substitute for batteries. This power-generating device does not need to be surgically removed and replaced.According to the researchers, the following experiments will aim to prove its effectiveness to larger animals and prolong its functioning. Improvement for the device would also include the incorporation of biocompatible materials. There will be a lot of experiments and enhancements that need to be done before its practical use. Possibly in a few years from now or, a shorter time, there may be some companies that will support the studies. It may be very useful in the field of medicine. It aims to replace batteries, which require regular operations.

In addition, besides the targeted pacemaker, the biofuel cell could find application in devices such as insulin pumps, artificial urinary sphincters, bone growth simulators and drug delivery devices as well as implanted medical sensors running for years. There's really an endless flowing of ideas and possibilities at the moment. The experiment may also lead for the development of failed experiments and as well as a motivation for those that are yet to be tried. It has reminded again those people concerned about the artificial organs. The technology is still considered to by young and its practical or commercial use is still far from reach.


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