基于DSP和DDS技术相位及频率严格可调的多路同步信号发生器

DSP and DDS Based Multiplex Synchronous Signals Source with Frequency and Phase Adjustable

基于DSP芯片TMS320f2812控制多片DDS芯片AD9833构成的信号发生器,能够产生频率和相位均严格可调的多路信号。该电路应用于是定子嵌入式电磁悬浮微马达的旋转驱动电路,实现转子的旋转驱动。通过C语言编译并采用串行方式加载芯片控制字,实现软件控制信号频率和相位差的调整。产生的信号具有频率稳定性好,低频频率准确度高及频率分辨率高,相位差精准等特点。

The signal generator based on a DSP chip TMS320F2812 and multiple DDS chips AD9833 can generate multiple signals with strictly adjustable frequency and phase.This circuit is used in a rotation drive circuit of electromagnet levitation micromotor with stator embedded.The control words are compiled by C and loaded serially to adjust frequency and phase difference by software.The generated signals are stable and accurate with high resolution frequency and accurate phase difference.