Digital frequency counter is being used for wide range of applications. Digital frequency counter extensively uses digital circuits and hence fairly good knowledge of digital circuits and of digital integrated circuits is required to understand the operation of the frequency counter. However a person who is not familiar with any electronics circuits and experiments has in written this article.

數(shù)字頻率計(jì)數(shù)器被廣泛的應(yīng)用。 數(shù)字頻率計(jì)數(shù)器廣泛采用數(shù)字電路，因此需要較好的數(shù)字電路和數(shù)字集成電路的知識(shí)，從而去了解頻率計(jì)數(shù)器的操作。 但是，還是有人不熟悉任何電子電路及實(shí)驗(yàn)，所以寫(xiě)這篇文章介紹數(shù)字頻率計(jì)數(shù)器。