高精度中频双极性PWM信号发生器的FPGA实现

针对DSP芯片的PWM驱动信号精度与载波频率不能兼顾的矛盾，提出了一种基于FPGA器件的高精度中频双极性PWM信号发生器，该PWM信号发生器采用VHDL语言予以实现，具有集成度高、抗干扰能力强、中频范围内频率可调而不改变PWM精度的特点。仿真结果表明在中频范围内，该PWM信号发生器可以方便的改变PWM驱动信号频率，而其精度不会变化。在长脉冲激光驱动电路中实验中，该PWM信号发生器很好地解决了PWM精度与频率之间的矛盾，并具有较强的抗干扰能力。

High precision driver signal of if bipolarity PWM based on FPGA

This paper presents a FPGA based device precision intermediate frequency (IF) bipolar PWM signal generator PWM drive signal to solve the contradiction between the accuracy and the carrier frequency cannot be balanced in DSP chip. The PWM signal generator using VHDL language to be realized, with high integration, strong anti jamming capability, the frequency range of the intermediate frequency can be adjusted without changing the accuracy of PWM. Simulation results show that in the IF, the PWM signal generator can easily change the frequency of the PWM drive signal, and its accuracy will not change. In the experiment a long pulse laser driver circuit, the PWM signal generator PWM good solution to the conflict between precision and frequency, and has strong anti jamming capability.