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《Spectrum, IEEE》2003,40(5):25-26
After recordable CDs hit the market in 1991, momentum on copying the discs began to build. Copies of original CDs were perfect and could themselves be copied ad infinitum. When blank disc prices dropped, people began copying CDs for their friends, just as they had with cassettes. As a result, recording companies began looking for ways to put the genie of infinitely copyable digital music files back into the bottle, based on the Red Book standard. Some of the techniques being used by the industry are discussed in this article. 相似文献
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本文分析了用于ADC和DAC的时钟/时钟源/时钟驱动器的特点. 相似文献
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Gene A.Frantz 《电子产品世界》2005,(18):112-114
在TI大屏幕电视市场的同事很是值得羡慕,不管他们开发什么新式显示技术,无论是DLP,等离子,还是LED、LCD,拥有这些显示技术的设备总是变得越来越大,而且离AC电源插座的距离也不会超过6英尺.对于便携市场领域而言,我们也努力实现更好的显示功能,不过需要解决两大难题.首先,封装空间非常有限,而且似乎越来越小;其次,必须保证设备能以越来越小的电池为其供电.这些已经是昨天的事情了.今天,我们的客户有了新的要求,希望获得多功能便携式设备,将传统上彼此不同但又相互联系的技术放入一部便携式设备之中. 相似文献
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《Spectrum, IEEE》2010,47(1):4-4
On a typically cloudless day in Mountain View, Calif., Google engineers are brainstorming feverishly, making emphatic notations on a whiteboard. Arcane tech problem? New business plan? Latest twist in the plot to rule cyberspace? No, these engineers are arguing the relative merits of superhuman powers. The choices? Invisibility versus flight, invisibility versus teleportation, flight versus teleportation, and the power to kill from 200 meters versus the power to move people with your mind. 相似文献