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关于adf4159杂散的问题

swjtuliwang 在 2017-6-4 詢問的問題
最後回覆由EmmaChen於2017-6-7提供

我注意到在adf4159的数据手册中提到“one such mechanism is the feedthrough of low levels of on-chip reference switching noise out through the RFINX pins back to the VCO,resulting in reference spur levels as high as -90dBc“,问题就来了,我在PCB 板上通过什么样的手段将reference swithcing noise out through the RFINX pins back to the vco?

另在adf5355中提到 ”feed through of low levels of on-chip reference switching noise,through the prescaler back to the vco,can result in reference spur levels as high as -80dBc“.

adf5355和adf4159对于提高 reference spur levels 的方法是不是矛盾的?

結果