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+- A Record-Setting Silicon Resonator at 4.5 GHz -> on Sunday March 30 2008, @04:12AM bibekpaudel
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bibekpaudel writes "Researchers at Cornell University have created a silicon microresonator that vibrates at 4.51 gigahertz, the highest frequency ever recorded in such a silicon device. Other researchers have demonstrated silicon microresonators that vibrate up to 1.5 gigahertz, say the Cornell researchers.The Cornell device is 8.5 micrometers long and 40 micrometers wide, compared with a width of about a millimeter for a quartz resonator.
For decades, quartz-crystal oscillators have served as clocks in all sorts of electronic gadgets. Placing a voltage across the crystal causes it to resonate at a predictable frequency, allowing all parts of a circuit to operate in synchrony. But these quartz clocks are relatively bulky, their size a significant barrier to shrinking circuits.
The high-frequency resonators could find uses as timekeepers for telecommunications and microprocessing. One of the advantages of silicon microresonators is that they can be integrated directly into microchips using conventional manufacturing techniques, making them cheaper to produce and easier to fabricate small."
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For decades, quartz-crystal oscillators have served as clocks in all sorts of electronic gadgets. Placing a voltage across the crystal causes it to resonate at a predictable frequency, allowing all parts of a circuit to operate in synchrony. But these quartz clocks are relatively bulky, their size a significant barrier to shrinking circuits.
The high-frequency resonators could find uses as timekeepers for telecommunications and microprocessing. One of the advantages of silicon microresonators is that they can be integrated directly into microchips using conventional manufacturing techniques, making them cheaper to produce and easier to fabricate small."
Link to Original Source
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