搜索 - 科创

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引用第8楼小特斯拉圈圈于2010-06-21 17:05发表的 :FKP250?和IRFP250一样吗？，IRFP250挺好的。IRFP250应该是玩高压的极品了。。我试过所有的管子里面，IRFP2...

好吧...我公布答案:1号和2号是火山玻璃.所谓的Apache Tears,产地是Superior, Arizona,American.形成条件是火山熔融物飞溅.3号是绿色蓝宝石.产地是Queensl...

引用 ddomax:嗯，图中情况是变不到低频，经过downconvert才到基带。我指的是不采用二次变频的情况下Feedthrough出来的频率就很低了吧，用高通滤波就能滤掉。而引用的图中是用了二次变...

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