A Method to Improve the Accuracy of Adjustable Phase Difference of Signal Generator

Abstract:

Direct digital frequency synthesis (DDFS) technology is applied widely in traditional fields which need signal source since it has a lot of advantages such as high frequency resolution, fast frequency setting and conversion speed and so on. Based on the working principle of DDFS, it is very important to calculate the phase control word when synthesizing the continuous adjustable phase difference signals. To address the shortcoming of large computation, low efficiency of phase difference setting, more storage space occupied or significant cumulative errors of phase setting when calculating phase control word with traditional methods, a novel algorithm for computing phase control word is studied in this paper. This new method does not need large computation and more space and simultaneously it can decrease the error greatly, which plays an important role in improving the phase setting speed and precision in signal generator.

• Periodical: Advanced Materials Research (Volumes 301-303)
• Pages: 823-827
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.301-303.823
• Online since: July 2011
• Authors: Jian Guo, Bing Wu Liu, Ping Ping Dong
• Keywords: Continuous Adjustable Phase Difference, Direct Digital Frequency Synthesis, Dual Signal Generator, Phase Control Word

References

[1] G. Qing, Y. Hailing, C. Shangsong. Design of Dual Tunable Phase Difference Signal Generator. Electronic Measurement Technology. Vol. 30(2007), pp.191-193.

[2] Ren Lijun, Tong ziquan, Zhao Aiming. The Design of Two-channel Function Generator with Phase-shift. Electrical measurement & Instrument. Vol. 39(2002), pp.17-20.

[3] Xu Xiaohong. The Development of Digital Synthesis Two-channel Function Generator. Harbin University of Science and Technology (2004).

[4] Zhao Yue. The Signal Generator Based on DDS. Measurement and Testing Technology. Vol. 37(2010), pp.9-10.

[5] Zhang Haitao, Miao Pu, Li Zhen. Research and Simulation on DDS Spurious Suppression. Computer Simulation. Vol. 28(2011), pp.397-401.

[6] Xu Lixia, Wang Weixing, Yu Long, Huang Yuanzhou. Design of Sine Signal Generator Based on Double MCU. Measurement and Control Technique. Vol. 26(2007), pp.32-34.

[7] Xu Yun, Chi Zhongjun, Zhang Kaihong, Zhou Hong. Study of Double Channel Arbitrary Wave Generator Based on Direct Digital Frequency Synthesis. Chinese Journal of Scientific Instrument. Vol27(2006), pp.515-519.

[8] Zhang Han-dong, Liu Juan. Analysis of the Spurious Caused by Phase Truncation in DDS and the Ways to Restrain It. Automation & Instrumentation. Vol. 3(2007), pp.26-28.