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problems of clock circuit

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xiaofeixia

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this is my clock circuit, but it's easy to be ruined when testing.
i want to know what is the matter if there is not a 50 ohm match when testing?
thanks a lot

Added after 59 seconds:

there r=50ohm and vdd=1.8v
 

echo47

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I can't see your image on photo.163.com. It appears as a broken link.
 

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