Development of a novel signal generator with high precision and adjustable frequency
Jie Zhu · Electronic Design Engineering · 2012
Basing on analyzing the principle of direct digital synthesis(DDS),a kind of signal generator of wide frequency range set,adjustable frequency and fast response is developed with MSP 430F135 microcontroller as main control circuit,AD9833 chip as core.The system structure and software and hardware of this signal generator are designed detailedly.To address the shortcoming of large computation,low efficiency of frequency setting,more storage space occupied or significant cumulative errors of frequency setting when calculating frequency control word with traditional methods,a novel calculation way for frequency control word is researched in this paper.This new method does not need large computation and more space and simultaneously it can decrease the error greatly and it can be applied effectively in designing signal generator.