采用EDA软件和FPGA可编程逻辑器件进行电子设计，以电子秒表为例，说明设计过程和方法。
This article introduces a new method of design electronic products with the EDA software and the FPGA programmable logic component.
这个秒表和电子计时触板一共多少钱? ?。
How much are the stopwatch and the elcctronic timing pad altogether?
展品：计算器，电子钟，定时器，秒表，办公用品。
Exhibits: Calculator, Lcd Clock, Timer, Stopwatch, Office Supplies.
分析了电子计数器时间间隔法测定电秒表的原理、误差及不稳定性，并且介绍了一种简便的门控法。
This paper analyses principle, error, and unstable state of determining the electric stop watch by means of time-interval method of electric counter. A simple gate-control method is presented at last.
分析了电子计数器时间间隔法测定电秒表的原理、误差及不稳定性，并且介绍了一种简便的门控法。
This paper analyses principle, error, and unstable state of determining the electric stop watch by means of time-interval method of electric counter. A simple gate-control method is presented at last.
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