Abstract
Digital pulse width modulation (DPWM) has advantages of strong anti-interference ability, high efficiency and good flexibility, therefore it has been widely used in switching power supply, communications, power control and transform and other fields. This paper proposed a high resolution DPWM control circuit based on field programmable gate array (FPGA), which solved the problem of low resolution and instability of the traditional DPWM control circuit. The principle of the proposed circuit is presented in this paper, and the circuit has been successfully implemented on the Xilinx Artix-7 FPGA development board. The experiment shows that, when the frequency of the circuit is 50 MHz, the resolution of DPWM can reach 78ps, and the proposed DPWM control circuit has wide application prospects.
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