Vhdl-based Electronic Design Automation And Applications

The Electronic Design Automation (EDA) technology has become an important design method of analog and digital circuit system as the integrated circuit抯 growing. The EDA technology, which is closely connected with the electronic technology, microelectronics technology and computer science, can be used in designing electronic product automatically. It was firstly put forwarded in 70s. And till now there has been three stages of the EDA. That is the computer aided design (CAD) of electronic circuit in 70s, the computer aided engineering (CAE) in 80s and the electronic system design automation (ESDA) in 90s. The ESDA, which is called EDA now, is based on the automatic synthesizer and the hardware description language (HDL). The design result of EDA can not only be verified by FPGAICPLD but also be implemented through the Application Specific Integrated Circuit (ASIC). One important characteristic of the EDA is that the design documents should be completed by the HDL. The VHDL is one of the standard hardware description languages validated by IEEE, which was firstly introduced in 1982. And it was widely used by electronic designer now. We firstly present some background information of EDA, FPGA./CPLD and VHDL in this thesis. The principle of frequency measurement then was introduced while more attention is put on the multi-cycle synchronous frequency measurement method and the average measuring technology which are used in the thesis. The design of a digital cymometer system, which is fulfilled by the VHDL, is also be discussed. Finally the current development trend of the EDA and my several experiences about the designing of the system are related.