An innovative FPGA internal core clock jitter prediction methodology

Soh, Lian Nee; Teng, Hui; Boyle, Peter; Wong, Man On; Fong, Chee Seong

doi:10.1109/apemc.2010.5475881

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Principle Of Pulse Laser Phase Ranging1

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2020

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“…It can be seen that the low mixer 'amplifies' the phase difference between two signals of the same frequency. Since the local oscillator signal of the mixing circuit comes from the PLL output signal of FPGA and the output signal of PLL has slight jitter [29,30], the edge of the output signal after mixing with only one D-flip-flop will inevitably generate burrs. In order to eliminate the burr caused by jitter, we introduce a digital buffing circuit based on the mixing circuit to construct a complete lower mixer, as shown in figure 5.…”

Section: Principle Of Pulse Laser Phase Rangingmentioning

confidence: 99%

Time-of-flight ranging method by measuring pulse laser phase based on field-programmable gate array digital mixing

Tao

Gong

Hou

et al. 2020

Meas. Sci. Technol.

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We propose a time-of-flight ranging method by measuring the pulse laser phase based on field-programmable gate array (FPGA) digital mixing, in which accurate laser ranging with a total digital system is realized by combining one FPGA chip with a simple laser transmitting and receiving circuit. The system has the advantage of simple structure, reliable operation, low manufacturing cost and easy integration. Experimental results show that compared with the pulse laser ranging method using commercial time-to-digital converter chips, it can realize precise measurement of distance, and the measurement error can be significantly reduced. In addition, this method has better performance of ranging accuracy.

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Section: Principle Of Pulse Laser Phase Rangingmentioning

confidence: 99%