Compared with prior art, the invention reduces the time of rough tuning as well as provides higher tuning precision according to the needs.

本发明与传统结构相比，既缩小了粗调谐所需时间，又可以根据需要获得较高的 调谐精度。

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The invention discloses a dual-loop frequency synthesizer and a tuning method of rough adjustment loop thereof, belonging to the field of frequency synthesizer in wireless transceiver.

本发明公开了一种双环路频率综合器及其粗调环路的调谐方法，属于无线收发机中的 频率综合器技术领域。

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