介绍了ＥＤＡ技术，分析了ＶＨＤＬ语言及基本特点，通过例子介绍了ＶＨＤＬ语言在电路设计中的仿真应用．-Introduced the EDA technology, analyzes the VHDL language and the basic characteristics, through the example introduced in the circuit design language VHDL Simulation Application.