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type="text/css"></style> <div id="ct" class="ct2 wp cl"> <div class="mn"> <div class="bm_haa cl"> <div class="bm_h cl"> <a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a><h1 class="xs2">文章</h1> </div></div> <div class="kjkjb"> <div class="bm vw" style="margin-bottom:0;"> <div class="h hm"> <div class="zxtoux"><img src="http://www.oecr.com/uc_server/avatar.php?uid=10207&size=small" /></div> <h1 class="ph">石墨烯有望使CPU主频1000GHz成为可能 </h1> <p class="xg1"> 时间：2009-4-16 01:36<a class="zz" href="home.php?mod=space&uid=10207">作者：乏味</a> 阅读<em id="_viewnum">(1564)</em> 评论: 0</p> <div class="zxfb" ><a href="http://www.oecr.com/portal.php?mod=rss&catid=57" class="y xi2 rss" target="_blank" title="RSS">订阅</a></div> </div> <!--[diy=diysummarytop]--><div id="diysummarytop" class="area"></div><!--[/diy]--> <div class="s"> <div class="ss"><div><span>导读： </span>在整个计算机行业的发展历程中，人们总是在不断追求更高的运算性能，提升处理器的运行频率无疑是最简单有效的方法。而我们知道，CPU的工作频率是由外频乘以倍频来得出的。因此，如果能够增大倍频的提升空间，就能够迅 ...</div> </div> <!--[diy=diysummarybottom]--><div id="diysummarybottom" class="area"></div><!--[/diy]--> <div class="d"> <!--[diy=diycontenttop]--><div id="diycontenttop" class="area"></div><!--[/diy]--> <table cellpadding="0" cellspacing="0" class="vwtb"><tr><td id="article_content"><P>在整个计算机行业的发展历程中，人们总是在不断追求更高的运算性能，提升处理器的运行频率无疑是最简单有效的方法。而我们知道，CPU的工作频率是由外频乘以倍频来得出的。因此，如果能够增大倍频的提升空间，就能够迅速的成倍提高性能。<BR> <BR>但倍频的提升并不是随意的。倍频信号由倍频器产生，当倍频不断提升时，输出信号的倍频噪声也会随之增大，必须进行滤波。并且，产生高倍频需要消耗的电能也相当可观。这也就是CPU频率提升迟迟无法获得重大突破的重要原因。<BR> <BR>不过日前，美国麻省理工学院研究人员使用新<a href="http://material.oecr.com" target="_blank" class="relatedlink">材料</a>制成的倍频器，有可能冲破这种限制，让处理器工作在令人惊讶的频率上。<BR> <BR>这种材料名为石墨烯（graphene），2004年由英国科学家发现。它是一种完美的单层碳原子二维<a href="http://material.oecr.com" target="_blank" class="relatedlink">晶体</a>，所有碳原子以正六边形排列。我们耳熟能详的碳<a href="http://material.oecr.com" target="_blank" class="relatedlink">纳米</a>管在某种意义上就可以看作是卷成卷的石墨烯。自从这种材料被发现以来，全世界科学家都在探究它在<a href="http://electronic.oecr.com" target="_blank" class="relatedlink">电子</a>、微处理器行业中的应用。<BR> <BR><A href="http://www.oecr.com/batch.download.php?aid=91" target=_blank><IMG border=0 src="http://www.oecr.com/attachments/2009/04/10207_200904160138121XPXU.jpg" ?></A></P> <P>石墨烯微芯片</P> <P><A href="http://www.oecr.com/batch.download.php?aid=92" target=_blank><IMG border=0 src="http://www.oecr.com/attachments/2009/04/10207_2009041601381516VIw.jpg" ?></A><BR><BR>石墨烯晶体</P> <P>麻省理工学院电子工程和计算机科学系副教授Tomas Palacios日前宣布，他使用石墨烯材料制成了只需要单个晶体管的倍频器，能够输出纯净的高倍频信号，同时能效也非常高。<BR> <BR>Tomas Palacios表示，在现有技术条件下，产生4、5GHz以上的频率难度都相当高。而石墨烯倍频器可以让系统运行在500GHz到1000GHz的范畴内。虽然目前该设备还处在实验室阶段，但在一两年内就有望实现应用。有关石墨烯倍频器技术的论文，将发表在5月号的《IEEE电子器件快报》上。</P></td></tr></table> <!--[diy=diycontentbottom]--><div id="diycontentbottom" class="area"></div><!--[/diy]--> <script src="data/cache/home.js?eOg" type="text/javascript"></script> <div id="click_div"><table 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