采用等精度测频原理的频率计 要求： 设计一个用等精度测频原理的频率计。 频率测量测量范围1~9999； 其精度为 ； 用4...

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采用等精度测频原理的频率计 要求： 设计一个用等精度测频原理的频率计。 频率测量测量范围1~9999； 其精度为 ； 用4位带小数点数码管显示其频率； 并且具有超量程、欠量程提示功能。-With equal precision frequency measurement principle of the frequency of meter requirements: design of a frequency measurement with the principle of equal precision frequency counter. Frequency Measurement Measuring Range 1 ~ 9999 its accuracy with four with a decimal point LED display its frequency and has a super-range, less range prompts.