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hertz |
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hertzSI unit of frequency (the number of repetitions of a regular occurrence in one second). A wave source has a frequency of 1 Hz if it produces one wave each second. Human beings have an audible range from approximately 20 Hz to 20,000 Hz. Radio waves are often measured in megahertz (MHz), millions of hertz, and the clock rate of a computer is usually measured in megahertz. The unit is named after German physicist Heinrich Hertz. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Although the new device can switch on and off at only the modest frequency of 3 gigahertz, frequencies 100 times as rapid as that appear feasible, Holonyak says. 4 gigahertz ZigBee ready prototype design, consummating a development agreement with Ember Corporation to bring ZigBee technology to Wellspring's Aqura wireless submetering system. John Zolper, DARPA program manager and deputy director, Microelectronics Technology Office, said, "The demonstration of a 152 Gigahertz static divider is a key milestone in developing circuit technology for establishing a new class of high-performance mixed signal circuits for the Department of Defense. |
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