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Article

Phase Difference Measurement Method Based on Progressive Phase Shift

by 1, 1,*, 2, 2 and 2
1
School of Aerospace Science and Technology, Xidian University, Xi’an 710071, China
2
Key Laboratory of Electronic Equipment Structure Design, Ministry of Education, Xidian University, Xi’an 710071, China
*
Author to whom correspondence should be addressed.
Electronics 2018, 7(6), 86; https://doi.org/10.3390/electronics7060086
Received: 15 May 2018 / Accepted: 30 May 2018 / Published: 1 June 2018
This paper proposes a method for phase difference measurement based on the principle of progressive phase shift (PPS). A phase difference measurement system based on PPS and implemented in the FPGA chip is proposed and tested. In the realized system, a fully programmable delay line (PDL) is constructed, which provides accurate and stable delay, benefitting from the feed-back structure of the control module. The control module calibrates the delay according to process, voltage and temperature (PVT) variations. Furthermore, a modified method based on double PPS is incorporated to improve the resolution. The obtained resolution is 25 ps. Moreover, to improve the resolution, the proposed method is implemented on the 20 nm Xilinx Kintex Ultrascale platform, and test results indicate that the obtained measurement error and clock synchronization error is within the range of ±5 ps. View Full-Text
Keywords: phase difference measurement; progressive phase shift; field programmable gate array; programmable delay line phase difference measurement; progressive phase shift; field programmable gate array; programmable delay line
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MDPI and ACS Style

Zhang, M.; Wang, H.; Qin, H.; Zhao, W.; Liu, Y. Phase Difference Measurement Method Based on Progressive Phase Shift. Electronics 2018, 7, 86. https://doi.org/10.3390/electronics7060086

AMA Style

Zhang M, Wang H, Qin H, Zhao W, Liu Y. Phase Difference Measurement Method Based on Progressive Phase Shift. Electronics. 2018; 7(6):86. https://doi.org/10.3390/electronics7060086

Chicago/Turabian Style

Zhang, Min, Hai Wang, Hongbo Qin, Wei Zhao, and Yan Liu. 2018. "Phase Difference Measurement Method Based on Progressive Phase Shift" Electronics 7, no. 6: 86. https://doi.org/10.3390/electronics7060086

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