PHPWIND
HELLOCQ
UID:120
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用这种电路。原理大致是两个一样的频率f1混频,差频为零(f1-f1=0),和频为f1+f1=2f1 [表情]
UID:5738
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想找一个12mhz的温补晶体改良以下频率计的温定度!
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