Direct digital synthesis (DDS) is an all digital frequency synthesis technique. Because of its special theory and construction, it has many kinds of modulation capability.

直接数字式频率合成(DDS)技术是一种全数字频率合成技术，其特殊的原理和结构使它具有多种调制能力。

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AIM: to compare the performance of two exciting sources based on direct digital synthesis (DDS) technology and to present some advice for the future system design.

目的：比较两种基于直接数字合成技术的阻抗激励源的性能，为以后阻抗系统设计提供指导。

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Direct digital synthesis (DDS) is an advanced all digital frequency synthesis technology, based on the PM function of DDS, this paper gives the design scheme of a DDS digital phase shifter.

直接数字式频率合成技术(DDS)是一种先进的全数字频率合成技术，本文基于DDS的相位调制功能，给出了一种DDS数字移相器的设计方案。

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