说明：  系统应用FPGA技术，通过VHDL编程，在CPLD上实现。电子琴的基本原理是产生各个音符对应的频率，将频率放大后驱动喇叭发出音响。该电子琴包括手动弹奏与自动演奏两种功能，其中手动弹奏时还可录音回放。文中叙述了电子琴的设计原理和分块实现的方法，详细介绍各模块的设计及模块之间的连接组合方法，还包括电子琴
(According to incomplete statistics, these companies represent about 40 of the domestic fiber laser marking market. It should be noted that this part of the market there is a significant reduction in price, a price close to the cost almost achieved. Although this is to walk in front of several vendors in a sufficient amount to promote the production scale, improve quality, and reduce costs, but to the entire industry brought "a good product but can not profit" )