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PLL phase noise

时间:04-09 整理:3721RD 点击:
Hi Guys
PLL is tested, the ouput frequency of oscillator is attached, for me, it looks very noise, any one know what is the problem? The input signal is a square wave instead of a sin wave. Also, what does VBW means?
Thanks

Could you provide less information about your circuit? We are overwhelmed by the detailed description.

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