本文研究了一种新颖的频率合成器,它采用数据取样技术,在时钟信号控制下,通过数字运算,在时域上合成所需要的频率信号。这种合成器不仅能做到易程控、频率分辨率高,而且还具有换频速度快,信号的相位连续及能输出信号的数字序列的特点。本文讨论了方案的工作原理、设计考虑以及对所产生的噪声作了分析。在研制的样机上论证了方案。经测试,量化噪声<-70dB。 In this paper, we study a novel frequency synthesizer that uses data sampling techniques to synthesize the required frequency signals in the time domain through digital operations under the control of a clock signal. This synthesizer can not only be easy to program, high frequency resolution, but also has the characteristics of fast frequency conversion, continuous signal phase and the digital sequence can output signals. This article discusses the working principle of the scheme, design considerations, and analysis of the resulting noise. The prototype was developed on the program. After testing, quantization noise <-70dB.