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随着计算机技术和可编程器件的发展,电子电路设计已逐步改变了由书面设计到硬件搭试再到制作样机的过程。尤其对于数字系统,中小规模的74LS 系列和 CD 系列器件已大量地被可编程逻辑器件 PLD 所替代,许多片由中小规模器件构成的电路可以放置在一片 PLD 中,同样,在电工及电子技术应用中,需要能够在当器件被焊接在电路板后,对电路系统进行改进和重构。常规方法对此比较困难,
With the development of computer technology and programmable devices, the design of electronic circuits has been gradually changed from written design to hardware test to prototype production process. Especially for digital systems, small and medium sized 74LS series and CD series devices have been largely replaced by PLDs, many of which are small and medium-sized devices that can be placed in a single PLD. Similarly, in applications such as electrical and electronic applications Need to be able to improve and reconstruct the circuit system when the device is soldered on the circuit board. Conventional methods are more difficult,