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ＡＤ９９０１是美国ＡＤＩ公司生产的超高速鉴频鉴相器，可处理高达２００ＭＨｚ信号，既具备模拟混频器的相位稳定性，也具有传统鉴频鉴相器内的锁定速度。本文详细地介绍了它的工作原理、性能及其应用。
AD9901 is the United States ADI company produced high-speed phase frequency detector can handle up to 200MHz signal, both analog phase mixer with phase stability, but also with the traditional phase-frequency detector phase lock speed. This article describes in detail its working principle, performance and its application.