Abstract
Low phase noise frequency source is the key block in the electronic systems. This paper reviews the recently published frequency discriminator based phase noise filter (PNF) techniques for the high fidelity clock. The proposed linear and Bang-Bang phase detector based PNFs are detailed in terms of the design concern, phase noise sensitivity improvement and advantages compared with other techniques. The proof-of-concept demonstrations achieve large phase noise suppression with good sensitivity for a 10 GHz clock. In addition, the benefit of PNF application in the array system is addressed. Outlook and future work of the PNF are also discussed.
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