Jun Wang and  Tingcun Wei,  A High Time Resolution Digital Pulse Width Modulator Based on Field Programmable Gate Array’s Phase Locked Loop Megafunction.   journal   = {International Journal of Electrical and Computer Engineering}, [online]. World Academy of Science, Engineering and Technology.
    October 2016, vol. 119(11). 1390 - 1393
    [viewed 07 March 2021]. Available from: https://publications.waset.org/pdf/10005808.