论文部分内容阅读
目前,通用的标准数字集成电路,如74系列、4000系列、14500系列,已广泛用于业余制作和一般产品中。这些集成电路通常都是小规模集成电路(SSI)或中规模集成电路(MSI)。 除此之外,在数字电路家族中有一类专用集成电路(ASIC)。专用集成电路,电子爱好者用得不多,主要是批量生产厂家使用。在复杂的电路系统中,往往用到许多块集成电路,使印刷电路相对复杂,占用印刷电路板面积大,可靠性下降。如果要改进电路,则需要重新设计电路板,生产厂家为了解决这一问题,可以根据自己的需要,向集成电路厂家提出要求,由集成电路厂家设计专用集成电路,然后再试制、批量生产。通常,专用集成电路的设计周期和生产
At present, the common standard digital integrated circuits, such as 74 series, 4000 series, 14500 series, have been widely used in amateur production and general products. These integrated circuits are usually small scale integrated circuits (SSI) or medium scale integrated circuits (MSI). In addition, there is a class of application specific integrated circuits (ASICs) in the digital circuit family. Specialized integrated circuits, electronic enthusiasts with limited use, mainly used by mass manufacturers. In complex circuit systems, often used in many blocks of integrated circuits, the printed circuit is relatively complex, occupy the printed circuit board area, reliability decreased. If you want to improve the circuit, you need to redesign the circuit board, the manufacturer in order to solve this problem, according to their own needs, IC manufacturers to make the request by the integrated circuit manufacturers design ASIC, and then trial production, mass production. Often, ASIC design cycles and production