The numerically controlled oscillator is often supposed to operate after interpolation in a conventional digital up converter, but such a converter works at quite high frequencies and consumes more power. In this paper, a type of low power structure digital up converter is proposed which carries out mixing and interpolating gradually, where the numerically controlled oscillator and the interpolation filter can both work at a lower frequency. Low power structure can move signal to any position within the whole Nyquist Band. Furthermore, the interpolation filter adopts a half-band filter with the structure of two parallel branches, which combines the functions of stuffing zero, filtering and modulation, and makes programmable modulation by exchanging input paths. A simulation is carried out on the Xilinx KC705 development kit, which indicates that its maximum work frequency of the low power structure reaches 392$$MHz while its power consumption reduces by 33.3% compared to the conventional structure.

数控振荡器通常应该在常规的数字上变频器中进行插值后才能工作，但是这种转换器工作在相当高的频率下并且消耗更多的功率。本文提出了一种低功率结构的数字上变频器，它可以逐步进行混合和内插，其中数控振荡器和内插滤波器都可以在较低的频率下工作。低功耗结构可以将信号移动到整个奈奎斯特频带内的任何位置。此外，插值滤波器采用具有两个并行分支结构的半带滤波器，结合了填充零，滤波和调制的功能，并通过交换输入路径进行可编程调制。在Xilinx KC705开发套件上进行了仿真，$$与传统结构相比，其功耗降低了33.3％。