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Accurate and low jitter time-interval generators based on phase shifting method
P Kwiatkowski1, Z Jachna, K Różyc
1Military University of Technology, Kaliskiego 2, 00-908 Warsaw, Poland.
Abstract:
The paper describes two time-interval generators based on the phase shifting method. The first one utilizes the digital clock manager units integrated in a field programmable gate array (FPGA) device and has jitter below 65 ps (rms) over the range of 4 ns-50 ms, while the second one utilizes a separate direct digital synthesizer and has jitter below 15 ps (rms) over the range of 10.2 ns-50 ms. The phase shifting method can be used to design new low-cost and high-precision time-interval generators using the popular FPGA technology.
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