本文通过在QuartursⅡ开发平台下，一种能够实现等占空比、非等占空比整数分频及半整数分频的通用分频器的FPGA设计与实现，介绍了利用VHDL硬件描述语言输入方式，设计数字电路的过程。-In this paper, the development platform in Quarturs Ⅱ, one can achieve such duty, such as the duty cycle of non-integer frequency division and semi-integer frequency divider of the FPGA general-purpose design and implementation, describes the use of VHDL hardware descr iption language input , digital circuit design process.